LITIX? Basic
1 Overview
Applications
? Exterior LED lighting applications such as tail/brake light, turn indicator,
position light, side marker,...
? Interior LED lighting applications such as ambient lighting (e.g. RGB),
interior illumination and dash board lighting.
Application Diagram with TLD2314EL
TLD2314EL
3 Channel High-Side Current Source
Package PG-SSOP-14
Marking TLD2314
to ot her LITIX? Basic
47
0
k
?
In case PWM via VS is performed
For E MI improvement if required
C
ST
=1
0
0
p
F
C
mo
d
=2
.2μ
F
GND
C
VS
=4.
7
n
F
R
SE
T
1
R
SE
T
2
R
SE
T
3
ISO-Pulse
protection circuit
depending on
requirements
Internal
supply
Output
control
Thermal
protection
DEN
TLD2314EL
VS
Status
ST GN
D
IN_SET3
Current
adjustment
IN_SET2
IN_SET1
Diagnosis
enable
OUT3
OUT2
OUT1
4.7
n
F
4.7
n
F
4.7
n
F
VBATT
Data Sheet Rev. 1.2
www.infineon.com 2018-04-26
LITIX? Basic
TLD2314EL
Overview
Basic Features
? 3 Channel device with integrated output stages (current sources), optimized to drive LEDs with output
current up to 120 mA per channel
? Low current consumption
? PWM-operation supported via VS-pin
? Output current adjustable via external low power resistor and possibility to connect PTC resistor for LED
protection during over temperature conditions
? Reverse polarity protection and overload protection
? Undervoltage detection
? Open load and short circuit to GND diagnosis
? Wide temperature range: -40°C < T
j
< 150°C
? PG-SSOP-14 package with exposed heatslug
Description
The LITIX? Basic TLD2314EL is a three channel high side driver IC with integrated output stages. It is designed
to control LEDs with a current up to 120 mA. In typical automotive applications the device is capable to drive
i.e. 3 red LEDs per chain (total 9 LEDs) with a current up to 60 mA, which is limited by thermal cooling aspects.
The output current is controlled practically independent of load and supply voltage changes.
Protective Functions
? ESD protection
? Under voltage lock out
?Over Load protection
? Over Temperature protection
? Reverse Polarity protection
Diagnostic Functions
? Diagnosis enable function
?OL detection
? SC to Vs (indicated by OL diagnosis)
? SC to GND detection
Table 1 Product Summary
Parameter Symbol Value
Operating voltage range V
S(nom)
5.5 V ... 40 V
Maximum voltage V
S(max)
V
OUTx(max)
40 V
Nominal output (load) current I
OUTx(nom)
60 mA when using a supply voltage range of 8 V - 18 V (e.g.
Automotive car battery). Currents up to I
OUT(max)
possible in
applications with low thermal resistance R
thJA
Maximum output (load) current I
OUTx(max)
120 mA; depending on thermal resistance R
thJA
Output current accuracy at R
SETx
= 12 k? k
LT
750 ± 7%
Data Sheet 2 Rev. 1.2
2018-04-26
Data Sheet 3 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Block Diagram
2 Block Diagram
Figure 1 Basic Block Diagram
Internal
supply
Output
control
Thermal
protection
DEN
TLD2314EL
VS
St atus
ST GN
D
IN_SET3
Current
adjustment
IN_SET2
IN_SET1
Diagnosis
enable
OUT3
OUT2
OUT1
LITIX? Basic
TLD2314EL
Pin Configuration
3 Pin Configuration
3.1 Pin Assignment
Figure 2 Pin Configuration
11
12
13
14
TLD2314EL
EP
10
4
3
2
1
5
NC
ST
OUT3
OUT2DEN
OUT1NC
VS
VS
IN_SET3
6
7
IN_SET2
IN_SET1
9
8NC
GND
Data Sheet 4 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Pin Configuration
3.2 Pin Definitions and Functions
Pin Symbol Input/
Output
Function
1, 2 VS – Supply Voltage; battery supply, connect a decoupling capacitor (100 nF - 1 μF)
to GND
3DENI Diagnosis enable pin
4NC– Pin not connected
5 IN_SET3 I/O Input / SET pin 3; Connect a low power resistor to adjust the output current
6 IN_SET2 I/O Input / SET pin 2; Connect a low power resistor to adjust the output current
7 IN_SET1 I/O Input / SET pin 1; Connect a low power resistor to adjust the output current
8NC– Pin not connected
9GND
1)
Ground
1) Connect all GND-pins together.
10 ST I/O Status pin
11 OUT1 O Output 1
12 OUT2 O Output 2
13 OUT3 O Output 3
14 NC – Pin not connected
Exposed
Pad
GND –
1)
Exposed Pad; connect to GND in application
Data Sheet 5 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
General Product Characteristics
4 General Product Characteristics
4.1 Absolute Maximum Ratings
Note: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Absolute Maximum Ratings
1)
T
j
= -40°C to +150°C; all voltages with respect to ground, positive current flowing into pin for input pins (I),
positive currents flowing out of the I/O and output pins (O) (unless otherwise specified)
1) Not subject to production test, specified by design
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Max.
Voltages
4.1.1 Supply voltage V
S
-16 40 V –
4.1.2 Diagnosis enable voltage DEN V
DEN
-16 40 V –
4.1.3 Diagn. enable voltage DEN related to V
S
V
DEN(VS)
V
S
- 40 V
S
+ 16 V –
4.1.4 Diagn. enable voltage DEN related to
V
OUTx
V
DEN
- V
OUTx
V
DEN
-
V
OUTx
-16 40 V –
4.1.5 Output voltage V
OUTx
-1 40 V –
4.1.6 Power stage voltage
V
PS
= V
S
- V
OUTx
V
PS
-16 40 V –
4.1.7 IN_SETx voltage V
IN_SETx
-0.3 6 V –
4.1.8 Status voltage V
ST
-0.3 6 V –
Currents
4.1.9 IN_SETx current I
IN_SETx
–
–
2
3
mA –
Diagnosis output
4.1.10 Output current I
OUTx
– 130 mA –
Temperatures
4.1.11 Junction temperature T
j
-40 150 °C –
4.1.12 Storage temperature T
stg
-55 150 °C –
ESD Susceptibility
4.1.13 ESD resistivity to GND V
ESD
-2 2 kV Human Body
Model (100 pF via
1.5 k?)
2)
2) ESD susceptibility, Human Body Model “HBM” according to ANSI/ESDA/JEDEC JS-001-2011
4.1.14 ESD resistivity all pins to GND V
ESD
-500 500 V CDM
3)
3) ESD susceptibility, Charged Device Model “CDM” according to JESD22-C101E
4.1.15 ESD resistivity corner pins to GND V
ESD
-750 750 V CDM
3)
Data Sheet 6 Rev. 1.2
2018-04-26
Note: Integrated protection functions are designed to prevent IC destruction under fault conditions described in
the data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions
are not designed for continuous repetitive operation.
LITIX? Basic
TLD2314EL
General Product Characteristics
4.2 Functional Range
Note: Within the functional range the IC operates as described in the circuit description. The electrical
characteristics are specified within the conditions given in the related electrical characteristics table.
4.3 Thermal Resistance
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Max.
4.2.16 Supply voltage range for
normal operation
V
S(nom)
5.5 40 V –
4.2.17 Power on reset threshold V
S(POR)
–5VR
SETx
=12k?
I
OUTx
= 80% I
OUTx(nom)
V
OUTx
=2.5V
4.2.18 Junction temperature T
j
-40 150 °C –
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
4.3.1 Junction to Case R
thJC
–810K/W
1)
2)
1) Not subject to production test, specified by design. Based on simulation results.
2) Specified R
thJC
value is simulated at natural convection on a cold plate setup (all pins and the exposed Pad
are fixed to ambient temperature). T
a
= 85°C, Total power dissipation 1.5 W.
4.3.2 Junction to Ambient 1s0p board R
thJA1
–
–
61
56
–
–
K/W
1)
3)
T
a
=85°C
T
a
= 135 °C
3) The R
thJA
values are according to Jedec JESD51-3 at natural convection on 1s0p FR4 board. The product
(chip + package) was simulated on a 76.2 x 114.3 x 1.5 mm
3
board with 70 μm Cu, 300 mm
2
cooling area.
Total power dissipation 1.5 W distributed statically and homogenously over all power stages.
4.3.3 Junction to Ambient 2s2p board R
thJA2
–
–
45
43
–
–
K/W
1)
4)
T
a
=85°C
T
a
= 135 °C
4) The R
thJA
values are according to Jedec JESD51-5,-7 at natural convection on 2s2p FR4 board. The product
(chip + package) was simulated on a 76.2 x 114.3 x 1.5 mm
3
board with 2 inner copper layers (outside 2 x
70 μm Cu, inner 2 x 35 μm Cu). Where applicable, a thermal via array under the exposed pad contacted the
first inner copper layer. Total power dissipation 1.5 W distributed statically and homogenously over all
power stages.
Data Sheet 7 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
DEN Pin
5 DEN Pin
The DEN pin is a single function pin:
Figure 3 Block Diagram DEN pin
This pin is used to activate or deactivate the device internal diagnosis functions. The diagnostic functions are
described in Chapter 6.2, Chapter 7 and Chapter 8. The diagnosis is activated, if the voltage applied at the
DEN pin V
DEN
is higher than V
DEN(act)
. The diagnosis is disabled for voltages below V
DEN(dis)
.
A possibility to use the DEN pin is via a Zener diode, which is connected between VS and DEN pin. A circuit
example is shown in the application information section Chapter 10.
The diagnosis is activated, if the following condition is fulfilled:
(1)
The current consumption on the DEN pin has to be considered for the total device current consumption. The
current is specified in Pos. 5.1.9. The typical current consumption I
DEN(H)
as a function of the supply voltage V
S
for a Zener diode voltage of V
ZD
= 6 V is shown in the following diagram.
Figure 4 Typical I
DEN(H)
current for a Zener diode voltage of 6 V
The device and channel turn on is independent of the V
DEN
-voltage. After applying a supply voltage the device
is activated after the power on reset time t
POR
.
V
DEN
DEN
Output Control
I
DEN
V
S
V
DEN act??
V
ZD
+?
0
20
40
60
80
100
120
140
160
0 2 4 6 8 10 12 14 16 18
I
DE
N
[μA]
V
S
[V]
Typical I
DEN
=f(V
S
) with (V
S
-V
DEN
)=6V
Tj=-40°C
Tj=25°C
Tj=150°C
Data Sheet 8 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
DEN Pin
Figure 5 Power on reset
The DEN voltage V
DEN
does not influence the disable function via the ST pin. If V
DEN
< V
DEN(dis)
the device can still
be disabled via the ST pin, if V
ST
> V
ST(H)
. For details, please refer to Chapter 7.3.
5.1 Electrical Characteristics Internal Supply / DEN Pin
Electrical Characteristics Internal Supply / DEN pin
Unless otherwise specified: V
S
= 5.5 V to 40 V, T
j
= -40°C to +150°C, R
SETx
=12kΩ all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
5.1.1 Current consumption,
active mode
I
S(on)
–– 1.9mA
1)
I
IN_SET
= 0μA
T
j
< 105 °C
V
S
= 18 V
V
OUTx
= 3.6V
5.1.2 Current consumption,
device disabled via ST
I
S(dis,ST)
–– 1.7mA
1)
V
S
= 18 V
T
j
< 105 °C
V
ST
= 5 V
5.1.3 Current consumption,
device disabled via
IN_SETx
I
S(dis,IN_SET)
–– 1.7mA
1)
V
S
= 18 V
T
j
< 105 °C
V
IN_SETx
= 5 V (all)
5.1.4 Current consumption,
active mode in single fault
detection condition with
ST-pin unconnected
I
S(fault,STu)
–– 2.1mA
1)
V
S
= 18 V
T
j
< 105 °C
R
SETx
= 12 kΩ
V
OUTx
= 18 V or 0 V
t
80%
t
POR
I
OUT
100%
V
S
Data Sheet 9 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
DEN Pin
5.1.5 Current consumption,
active mode in single fault
detection condition with
ST-pin connected to GND
I
S(fault,STG)
–– 6.2mA
1)
V
S
= 18 V
T
j
< 105 °C
R
SET1
= 12 kΩ
R
SET2,3
= unconnected
V
OUTx
= 18 V or 0 V
V
ST
= 0 V
5.1.6 Current consumption,
active mode in double
fault detection condition
one output disabled via
IN_SETx and with ST-pin
connected to GND
I
S(dfault,STG)
–– 9.2mA
1)
V
S
= 18 V
T
j
< 105 °C
R
SET1,2
= 12 kΩ
R
SET3
= unconnected
V
OUTx
= 18 V or 0 V
V
ST
= 0 V
5.1.7 Power-on reset delay time
2)
t
POR
–– 25μs
3)
V
S
=0→13.5 V
V
OUTx(nom)
= 3.6 ± 0.3V
I
OUTx
= 80% I
OUTx(nom)
5.1.8 Required supply voltage
for current control
V
S(CC)
–– 5.VV
OUTx
= 3.6 V
I
OUTx
≥ 90% I
OUTx(nom)
5.1.9 DEN high input current I
DEN(H)
–
–
–
–
–
–
–
–
0.1
0.1
0.2
0.4
mA T
j
< 105 °C
V
S
= 13.5 V, V
DEN
= 5.5 V
V
S
= 18 V, V
DEN
= 5.5 V
V
S
= 18 V, V
DEN
= 12 V
V
S
= V
DEN
= 18 V
5.1.10 DEN activation threshold
(diagnosis enabled above
V
DEN(act)
)
V
DEN(act)
2.45 – 3.2 V V
S
= 8...18 V
5.1.11 DEN deactivation
threshold (diagnosis
disabled below V
DEN(dis)
)
V
DEN(dis)
1.5 – 2.3 V V
S
= 8...18 V
1) The total device current consumption is the sum of the currents I
S
and I
DEN(H)
, please refer to Pos. 5.1.9
2) See also Figure 4
3) Not subject to production test, specified by design
Electrical Characteristics Internal Supply / DEN pin (cont’d)
Unless otherwise specified: V
S
= 5.5 V to 40 V, T
j
= -40°C to +150°C, R
SETx
=12kΩ all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
Data Sheet 10 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
IN_SETx Pin
6 IN_SETx Pin
The IN_SET pin is a multiple function pin for output current definition, input and diagnostics:
Figure 6 Block Diagram IN_SET pin
6.1 Output Current Adjustment via RSET
The output current of each channel can be adjusted independently. The current adjustment can be done by
placing a low power resistor (R
SET
) at the IN_SETx pin to ground. The dimensioning of the resistor can be done
using the formula below:
(2)
The gain factor k (R
SET
output current) is specified in Pos. 9.2.4 and Pos. 9.2.5. The current through the R
SET
is defined by the resistor itself and the reference voltage V
IN_SET(ref)
, which is applied to the IN_SET during
supplied device.
6.2 Smart Input Pin
The IN_SETx pin can be connected via R
SET
to the open-drain output of a μC or to an external NMOS transistor
as described in Figure 7 This signal can be used to turn off the output stages of the IC. A minimum IN_SET
current of I
IN_SET(act)
is required to turn on the output stages. This feature is implemented to prevent glimming
of LEDs caused by leakage currents on the IN_SET pin, see Figure 10 for details. In addition, the IN_SET pin
offers the diagnostic feedback information, if the status pin is connected to GND and V
DEN
> V
DEN(act)
(refer to
Chapter 5). Another diagnostic possibility is shown in Figure 8, where the diagnosis information is provided
via the ST pin (refer to Chapter 7 and Chapter 8) to a micro controller In case of a fault event with the ST pin
connected to GND the IN_SET voltage is increased to V
IN_SET(OL/SC)
Pos. 8.4.2. Therefore, the device has two
voltage domains at the IN_SET-pin, which is shown in Figure 11.
Note: If one output has a present fault (open load or short circuit) and one or both of the other channels are
dimmed via PWM at the IN_SET-pins a short spike to V
IN_SET(OL/SC)
is possible. Please refer to Chapter 8.3.
I
IN_SET
V
IN_SET(OL/SC)
IN_SET
GND
V
IN_SET
Logic
high impedance
R
SET
k
I
OUT
-----------=
Data Sheet 11 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
IN_SETx Pin
Figure 7 Schematics IN_SET interface to μC, diagnosis via IN_SET pin
Figure 8 Schematics IN_SET interface to μC, diagnosis via ST pin
The resulting switching times are shown in Figure 9:
R
SET
/2
Microcontroller
(e.g. XC866)
OUT
V
DDP
= 5 V
Current
adjust
IN_SET
GND
Basic LED Driver
R
SET
/2
IN
Status
ST
Microcontroller
(e.g. XC866)
OUT
V
DDP
= 5 V
Current
adjust
IN_SET
GND
Basic LED Driver
IN
Status
ST
R
SET
optional
I
IN_SET
t
t
20%
80%
t
ON(IN_SET )
I
OUT
100%
t
OFF(IN_SET)
Data Sheet 12 Rev. 1.2
2018-04-26
Figure 9 Switching times via IN_SET
LITIX? Basic
TLD2314EL
IN_SETx Pin
Figure 10 I
OUT
versus I
INSET
Figure 11 Voltage domains for IN_SET pin, if ST pin is connected to GND
I
IN_SET(ACT)
I
IN_SET
[μA]
I
OUT
[mA]
k = I
OUTx
V
IN_SET(ref)
/ I
IN_SETx
I
OUTx
I
IN_SETx
V
IN _S E T (ref ) m ax
V
IN_SET(OL/SC)min
V
IN_SET
V
IN _SET(OL/SC)max
Normal operation and high temperature current
reduction range
Diagnostic voltage range
Data Sheet 13 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
ST Pin
7 ST Pin
The ST pin is a multiple function pin.
Figure 12 Block Diagram ST pin
7.1 Diagnosis Selector
If the voltage at the DEN pin V
DEN
is higher than V
DEN(act)
, the diagnosis is activated. For details, please refer to
Chapter 5. If the status pin is unconnected or connected to GND via a high ohmic resistor (V
ST
to be below
V
ST(L)
), the ST pin acts as diagnosis output pin. In normal operation (device is activated) the ST pin is pulled to
GND via the internal pull down current I
ST(PD)
. In case of an open load or short circuit to GND condition the ST
pin is switched to V
ST(OL/SC)
after the open load or short circuit detection filter time (Pos. 8.4.9, Pos. 8.4.12).
If the device is operated in PWM operation via the VS pin the ST pin should be connected to GND via a high
ohmic resistor (e.g. 470 kΩ) to ensure proper device behavior during fast rising VS slope.
If the ST pin is shorted to GND the diagnostic feedback is performed via the IN_SET-pin, which is shown in
Chapter 6.2 and Chapter 8.
7.2 Diagnosis Output
If the status pin is unconnected or connected to GND via a high ohmic resistor (V
ST
to be below V
ST(L)
), it acts as
a diagnostic output, if the voltage at the DEN pin is above V
DEN(act)
. In case of a fault condition the ST pin rises
its voltage to V
ST(OL/SC)
(Pos. 8.4.7). Details are shown in Chapter 8.
7.3 Disable Input
If an external voltage higher than V
ST(H)
(Pos. 8.4.5) is applied to the ST pin, the device is switched off. This
function is working independently of the voltage at the DEN pin. Even if the diagnosis is disabled via
V
DEN
< V
DEN(dis)
the disable function of the ST pin is working. This function is used for applications, where
multiple drivers should be used for one light function. It is possible to combine the drivers’ fault diagnosis via
the ST pins. If a single LED chain fails, the entire light function is switched off. In this scenario e.g. the
diagnostic circuit on the body control module can easily distinguish between the two cases (normal load or
I
ST(OL/SC)
V
ST
ST
Output Control
FaultNo fault
V
ST(OL/SC)
I
ST(PD)
FaultNo fault
Data Sheet 14 Rev. 1.2
2018-04-26
load fault), because nearly no current is flowing into the LED module during the fault scenario - the drivers
consume a current of I
S(fault,STu)
(Pos. 5.1.4) or I
S(dis,ST)
(Pos. 5.1.2).
LITIX? Basic
TLD2314EL
ST Pin
As soon as one LED chain fails, the ST-pin of this device is switched to V
ST(OL/SC)
. The other devices used for the
same light function can be connected together via the ST pins. This leads to a switch off of all devices
connected together.
Figure 13 Switching times via ST Pin
V
ST
t
t
20%
80%
t
ON(ST)
I
OUT
100%
t
OFF(ST)
Data Sheet 15 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Load Diagnosis
8 Load Diagnosis
The diagnosis function is enabled, if the voltage at the DEN pin V
DEN
is above V
DEN(act)
as described in Chapter 5.
8.1 Open Load
An open load diagnosis feature is integrated in the TLD2314EL driver IC. If there is an open load on one of the
outputs, the respective output is turned off. The potential on the IN_SET pin rises up to V
IN_SET(OL/SC)
, if the ST
is connected to GND. This high voltage can be used as input signal for an μC as shown in Figure 8. If the ST pin
is open or connected to GND via a high ohmic resistor, the ST pin rises to a high potential as described in
Chapter 7. More details are shown in Figure 17. The open load status is not latched, as soon as the open load
condition is no longer present, the output stage will be turned on again. An open load condition is detected, if
the voltage drop over the output stage V
PS
is below the threshold according Pos. 8.4.10 and a filter time of t
OL
is passed.
Figure 14 IN_SET behavior during open load condition with ST pin connected to GND and V
DEN
> V
DEN(act)
t
V
S
–V
PS(OL)
t
OL
V
OUT
t
V
F
V
IN_SET(ref)
V
IN _SET(OL/SC)
V
S
V
IN_SET
open load
occurs
open load
disappears
t
IN_SET (reset)
Data Sheet 16 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Load Diagnosis
Figure 15 IN_SET and ST behavior during open load condition (ST unconnected) and V
DEN
> V
DEN(act)
8.2 Short Circuit to GND detection
The TLD2314EL has an integrated SC to GND detection. If the output stage is turned on and the voltage at the
output falls below V
OUT(SC)
the potential on the IN_SET pin is increased up to V
IN_SET(OL/SC)
after t
SC
, if the ST pin
is connected to GND. If the ST is open or connected to GND via a high ohmic resistor the fault is indicated on
the ST pin according to Chapter 7 after t
SC
. More details are shown in Figure 17. This condition is not latched.
For detecting a normal condition after a short circuit detection an output current according to I
OUT(SC)
is driven
by the channel.
t
V
S
–V
PS(OL)
t
OL
V
OUT
V
F
V
S
open load
occurs
open load
disappears
t
IN_SET(reset)
V
ST
t
VST(OL/SC)
V
IN_SET
t
V
IN _SET(ref)
Data Sheet 17 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Load Diagnosis
Figure 16 IN_SET behavior during short circuit to GND condition with ST connected to GND and V
DEN
>
V
DEN(act)
t
VOUT (SC)
t
SC
V
OUT
V
IN_SET
t
V
F
V
IN _SET(ref)
VIN _SET(OL/SC)
t
IN_SET( reset)
short circuit
occurs
short circuit
disappears
t
VOUT (SC)
t
SC
V
OUT
V
ST
t
V
F
VST(OL/SC)
t
IN_SET (reset)
short circuit
occurs
short circuit
disappears
V
IN_SET
t
V
IN_SET(ref )
Data Sheet 18 Rev. 1.2
2018-04-26
Figure 17 IN_SET and ST behavior during short circuit to GND condition (ST unconnected) and V
DEN
>
V
DEN(act)
LITIX? Basic
TLD2314EL
Load Diagnosis
8.3 Double Fault Conditions
The TLD2314EL allows the diagnosis of each channel separately, as long as the ST-pin is shorted to GND The
diagnosis filter times t
OL
and t
SC
(Pos. 8.4.9 and Pos. 8.4.12) are valid only for the channel, which diagnoses
first the fault condition. For the other channel or channels with a subsequential fault the diagnosis is reported
immediately without the diagnosis filter time, if the filter time t
OL
has been elapsed for the channel with the
first fault. During activation via IN_SET of a non-faulty output, where one channel has already a fault detected,
a short spike to V
IN_SET(OL/SC)
could occur on the channel, which should be activated. Therefore, in general a
diagnosis should be done earliest after the diagnosis filter times t
OL
and t
SC
to avoid any incorrect diagnosis
readout. In the scenario mentioned above the turn on time t
ON(IN_SET)
could be extended. The following figure
shows the example behavior, if OUT1 has a fault and OUT2 is operated in PWM-mode. OUT3 is disabled.
Data Sheet 19 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Load Diagnosis
Figure 18 Example single channel fault on OUT1 and PWM-operation on OUT2 with ST pin connected
to GND and V
DEN
> V
DEN(act)
t
V
S
–V
PS(OL)
t
OL
V
OUT1
t
VF
V
IN _SET(ref)
V
IN _SET(OL/SC)
V
S
V
IN_SET 1
open load
occurs
t
V
OUT2
t
V
F
V
IN _SET(ref)
V
IN _SET(OL/SC)
V
IN_SET2
V
OUT ( SC)
turn on command
I
IN_SET1
t
I
IN_SET2
t
VIN_SET(OL/SC) / RSET1
VIN_SET(ref ) / RSET1
V
IN _SET(OL/SC)
/ R
SET2
V
IN _SET(ref )
/ R
SET2
Data Sheet 20 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Load Diagnosis
8.4 Electrical Characteristics IN_SET Pin and Load Diagnosis
Electrical Characteristics IN_SET pin and Load Diagnosis
Unless otherwise specified: V
S
= 5.5 V to 40 V, T
j
= -40°C to +150°C, R
SETx
= 12 kΩ, V
DEN
= 5.5 V, all voltages with respect
to ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output pins (O)
(unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
8.4.1 IN_SET reference
voltage
V
IN_SET(ref)
1.19 1.23 1.27 V
1)
V
OUTx
=3.6V
T
j
= 25...115 °C
8.4.2 IN_SET open load/short
circuit voltage
V
IN_SET(OL/SC)
4– 5.V
1)
V
S
> 8 V
T
j
= 25...150 °C
V
S
= V
OUTx
(OL) or V
OUTx
=
0V (SC)
8.4.3 IN_SET open load/short
circuit current
I
IN_SET(OL/SC)
0.5 – 2.5 mA
1)
V
S
> 8 V
T
j
= 25...150 °C
V
IN_SET
= 4 V
V
S
= V
OUTx
(OL) or
V
OUT
= 0 V (SC)
8.4.4 ST device turn on
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
V
ST(L)
0.8 – – V –
8.4.5 ST device turn off
threshold (active low) in
case of voltage applied
from external (ST-pin
acting as input)
V
ST(H)
–– 2.5V–
8.4.6 ST pull down current I
ST(PD)
–– 15μAV
ST
=0.8V
8.4.7 ST open load/short
circuit voltage (ST-pin
acting as diagnosis
output)
V
ST(OL/SC)
4– 5.V
1)
V
S
> 8 V
T
j
= 25...150 °C
R
ST
= 470 kΩ
V
S
= V
OUTx
(OL) or
V
OUT
= 0 V (SC)
8.4.8 ST open load/short
circuit current (ST-pin
acting as diagnosis
output)
I
ST(OL/SC)
100 – 220 μA
1)
V
S
> 8 V
T
j
= 25...150 °C
V
ST
= 2.5 V
V
S
= V
OUTx
(OL) or
V
OUT
= 0 V (SC)
8.4.9 OL detection filter time t
OL
10 22 35 μs
1)
V
S
>8V
8.4.10 OL detection voltage
V
PS(OL)
= V
S
- V
OUTx
V
PS(OL)
0.2 – 0.4 V V
S
>8V
Data Sheet 21 Rev. 1.2
2018-04-26
8.4.11 Short circuit to GND
detection threshold
V
OUT(SC)
0.8 – 1.4 V V
S
>8V
8.4.12 SC detection filter time t
SC
10 22 35 μs
1)
V
S
> 8 V
LITIX? Basic
TLD2314EL
Load Diagnosis
8.4.13 IN_SET diagnosis reset
time
t
IN_SET(reset)
–5 20μs
1)
V
S
> 8 V
8.4.14 SC detection current in
case of unconnected ST-
pin
I
OUT(SC,STu)
100 200 300 μA V
S
> 8 V
V
OUTx
= 0 V
8.4.15 SC detection current in
case of ST-pin shorted
to GND
I
OUT(SC,STG)
0.1 2 4.75 mA V
S
> 8 V
V
OUTx
= 0 V
V
ST
= 0 V
8.4.16 IN_SET activation
current without turn on
of output stages
I
IN_SET(act)
2– 15μASe Figure 10
1) Not subject to production test, specified by design
Electrical Characteristics IN_SET pin and Load Diagnosis (cont’d)
Unless otherwise specified: V
S
= 5.5 V to 40 V, T
j
= -40°C to +150°C, R
SETx
= 12 kΩ, V
DEN
= 5.5 V, all voltages with respect
to ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output pins (O)
(unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
Data Sheet 22 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Power Stage
9 Power Stage
The output stages are realized as high side current sources with a current of 120 mA. During off state the
leakage current at the output stage is minimized in order to prevent a slightly glowing LED. To increase the
overall output current for high brightness LED applications it is possible to connect two or all three output
stages in parallel.
The maximum current of each channel is limited by the power dissipation and used PCB cooling areas (which
results in the applications R
thJA
).
For an operating current control loop the supply and output voltages according to the following parameters
have to be considered:
? Required supply voltage for current control V
S(CC)
, Pos. 5.1.8
? Voltage drop over output stage during current control V
PS(CC)
, Pos. 9.2.6
? Required output voltage for current control V
OUTx(CC)
, Pos. 9.2.7
9.1 Protection
The device provides embedded protective functions, which are designed to prevent IC destruction under fault
conditions described in this data sheet. Fault conditions are considered as “outside” normal operating range.
Protective functions are neither designed for continuous nor for repetitive operation.
9.1.1 Over Load Behavior
An over load detection circuit is integrated in the LITIX? Basic IC. It is realized by a temperature monitoring of
the output stages (OUTx).
As soon as the junction temperature exceeds the current reduction temperature threshold T
j(CRT)
the output
current will be reduced by the device by reducing the IN_SET reference voltage V
IN_SET(ref)
. This feature avoids
LED’s flickering during static output overload conditions. Furthermore, it protects LEDs against over
temperature, which are mounted thermally close to the device. If the device temperature still increases, the
three output currents decrease close to 0 A. As soon as the device cools down the output currents rise again.
Figure 19 Output current reduction at high temperature
Note: This high temperature output current reduction is realized by reducing the IN_SET reference voltage
voltage (Pos. 8.4.1). In case of very high power loss applied to the device and very high junction
temperature the output current may drop down to I = 0 mA, after a slight cooling down the current
T
j
I
OUT
T
j(CRT)
V
IN_SET
Data Sheet 23 Rev. 1.2
2018-04-26
OUTx
increases again.
LITIX? Basic
TLD2314EL
Power Stage
9.1.2 Reverse Battery Protection
The TLD2314EL has an integrated reverse battery protection feature. This feature protects the driver IC itself,
but also connected LEDs. The output reverse current is limited to I
OUTx(rev)
by the reverse battery protection.
Note: Due to the reverse battery protection a reverse protection diode for the light module may be obsolete. In
case of high ISO-pulse requirements and only minor protecting components like capacitors a reverse
protection diode may be reasonable. The external protection circuit needs to be verified in the application.
9.2 Electrical Characteristics Power Stage
Electrical Characteristics Power Stage
Unless otherwise specified: V
S
= 5.5 V to 18 V, T
j
= -40°C to +150°C, V
OUTx
= 3.6 V, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
9.2.1 Output leakage current I
OUTx(leak)
–
–
–
–
7
3
μA I
IN_SET
= 0μA
V
OUTx
=2.5V
T
j
= 150 °C
1)
T
j
= 85 °C
9.2.2 Output leakage current in
boost over battery setup
-
I
OUTx(leak,B2B)
––50μA
1)
I
IN_SET
=0μA
V
OUTx
= V
S
= 40 V
9.2.3 Reverse output current -I
OUTx(rev)
––1μA
1)
V
S
= -16 V
Output load: LED with
break down voltage
<-0.6V
9.2.4 Output current accuracy
limited temperature range
k
LT
697
645
750
750
803
855
1)
T
j
= 25...115 °C
V
S
= 8...18 V
V
PS
= 2 V
R
SETx
= 6...12 kΩ
R
SETx
= 30 kΩ
9.2.5 Output current accuracy
over temperature
k
ALL
697
645
750
750
803
855
1)
T
j
= -40...115 °C
V
S
= 8...18 V
V
PS
= 2 V
R
SETx
= 6...12 kΩ
R
SETx
= 30 kΩ
9.2.6 Voltage drop over power
stage during current
control V
PS(CC)
= V
S
- V
OUTx
V
PS(CC)
0.75 – – V
1)
V
S
= 13.5 V
R
SETx
= 12 kΩ
I
OUTx
≥ 90% of
(k
LT(typ)
/R
SETx
)
9.2.7 Required output voltage
for current control
V
OUTx(CC)
2.3 – – V
1)
V
S
= 13.5 V
R
SETx
= 12 kΩ
I
OUTx
≥ 90% of
Data Sheet 24 Rev. 1.2
2018-04-26
(k
LT(typ)
/R
SETx
)
LITIX? Basic
TLD2314EL
Power Stage
9.2.8 Maximum output current I
OUT(max)
120 – – mA R
SETx
= 4.7 kΩ
The maximum output
current is limited by the
thermal conditions.
Please refer to
Pos. 4.3.1 - Pos. 4.3.3
9.2.9 ST turn on time t
ON(ST)
––15μs
2)
V
S
= 13.5 V
R
SETx
= 12 kΩ
ST → L
I
OUTx
= 80% of
(k
LT(typ)
/R
SETx
)
9.2.10 ST turn off time t
OFF(ST)
––10μs
2)
V
S
= 13.5 V
R
SETx
= 12 kΩ
ST →H
I
OUTx
= 20% of
(k
LT(typ)
/R
SETx
)
9.2.11 IN_SET turn on time t
ON(IN_SET)
––15μsV
S
= 13.5 V
I
IN_SET
= 0 → 100 μA
I
OUTx
= 80% of
(k
LT(typ)
/R
SETx
)
9.2.12 IN_SET turn off time t
OFF(IN_SET)
––10μsV
S
= 13.5 V
I
IN_SET
= 100 → 0μA
I
OUTx
= 20% of
(k
LT(typ)
/R
SETx
)
9.2.13 Current reduction
temperature threshold
T
j(CRT)
– 140 – °C
1)
I
OUTx
= 95% of
(k
LT(typ)
/R
SETx
)
9.2.14 Output current during
current reduction at high
temperature
I
OUT(CRT)
85% of
(k
LT(typ)
/R
SETx
)
––A
1)
R
SETx
=12kΩ
T
j
= 150 °C
1) Not subject to production test, specified by design
2) see also Figure 13
Electrical Characteristics Power Stage (cont’d)
Unless otherwise specified: V
S
= 5.5 V to 18 V, T
j
= -40°C to +150°C, V
OUTx
= 3.6 V, all voltages with respect to
ground, positive current flowing into pin for input pins (I), positive currents flowing out of the I/O and output
pins (O) (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
Data Sheet 25 Rev. 1.2
2018-04-26
Data Sheet 26 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Application Information
10 Application Information
Note: The following information is given as a hint for the implementation of the device only and shall not be
regarded as a description or warranty of a certain functionality, condition or quality of the device.
Figure 20 Application Diagram with Diagnosis for each channel
Note: This is a very simplified example of an application circuit. In case of high ISO-pulse requirements a reverse
protection diode may be used for LED protection. The function must be verified in the real application.
10.1 Further Application Information
? For further information you may contact http://www.infineon.com/
Micro-
controller
(e.g.
XC866)
OUT3
IN3
OUT2
IN2
OUT1
IN1
Open Drain
RSET/2 RSET/2
V
BATT C
mod
=2.2μF
ISO-Pulse protection circuit
depending on requirements
C
VS
=4.7nF
4.7nF 4.7nF 4.7nF
For EMI improvement, if required.
Output
control
OUT2
Current
adjust
Basic LED Driver
GND
IN_SET2
Status
ST
OUT3
OUT1
IN_SET1
IN_SET3
Internal
supply
Thermal
protection
DEN
VS
Diagnosis
enable
LITIX
TM
Basic
Data Sheet 27 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Package Outlines
11 Package Outlines
Figure 21 PG-SSOP-14
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products and to be compliant
with government regulations the device is available as a green product. Green products are RoHS-Compliant
(i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).
PG-SSOP-14-1,-2,-3-PO V02
1 7
14 8
14
17
8
14x
0.25±0.05
2)
M
0.15 DC A-B
0.65
C
Stand Off0 ...
0.1
(1.45)
1.7 MAX.
0.08 C
A
B
4.9±0.1
1)
A-BC0.1 2x
1) Does not include plastic or metal protrusion of 0.15 max. per side
2) Does not include dambar protrusion
Bottom View
±0.23
±0.2
2.65
0.2
±0.2
D
6
M D 8x
0.64
±0.25
3.9±0.1
1)
0.35 x 45?
0.1 CD
+0.06
0.19
8
?
MAX.
Index Marking
Exposed
Diepad
Dimensions in mm
For further information on alternative packages, please visit our website:
http://www.infineon.com/packages.
Data Sheet 28 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
Revision History
12 Revision History
Revision Date Changes
1.0 2013-08-08 Inital revision of data sheet
1.1 2015-03-19 Updated parameters K
LT
and K
ALL
in the chapter Power Stage
1.2
2018-04-26
Updated to latest template
1.2 2018-04-26 Updated application drawing
1.2 2018-04-26 Updated package marking
1.2 2018-04-26 Updated package figure
Data Sheet 29 Rev. 1.2
2018-04-26
LITIX? Basic
TLD2314EL
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 DEN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1 Electrical Characteristics Internal Supply / DEN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 IN_SETx Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Output Current Adjustment via RSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Smart Input Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 ST Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1 Diagnosis Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2 Diagnosis Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.3 Disable Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8 Load Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1 Open Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.2 Short Circuit to GND detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.3 Double Fault Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.4 Electrical Characteristics IN_SET Pin and Load Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
9 Power Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1.1 Over Load Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1.2 Reverse Battery Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.2 Electrical Characteristics Power Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.1 Further Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table of Contents
Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2018-04-26
Published by
Infineon Technologies AG
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TLD2314EL
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