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【Concept】 Conventional batteries for automotive (car 12V, trucks 24V) powered car charger, rechargeable lithium batteries widely used in the field of a variety of portable , handheld devices , such as : mobile phone , PDA, GPS , etc. ; Car Charger necessary to consider the lithium battery actual demand ( constant voltage CV, CC CC, overvoltage protection OVP) charge Also take into account the harsh environment of the car battery ( transient voltage spikes , the system switching noise interference , EMI , etc. ) ; Therefore, the selected car charger power management IC solutions must also be met: high pressure, high efficiency, high reliability, low frequency ( in favor of EMI design ) switching power supply chip. =================================
【Classification terminology】 [ 1 ] Monolithic 34063 [2] 34063 + NPN (NMOS) [ 3] 2576 +358 + regulator [4] XLSEMI monolithic design car charger ] [5] XLSEMI Car Charger Series ================================= 【Principle terminology】 ----------------
1 [ single 34063 ] Achieve low-end car charger schematic plan Advantages :: Low cost ; Disadvantages: ( 1 ) poor reliability , single function ; do not over- temperature protection, short circuit protection and other security measures ( 2 ) Although the DC output voltage , output current , but controlled way for maximum charging current peak switch current limit , the accuracy is not high enough ( 3 ) Because 34063 is 1.5A switch current PWM + PFM mode ( no internal error amplifier ) , and its car charger program output DC voltage ripple current is relatively large , not pure ; Output current capability is very limited ; ( common in 300ma ~ low-end car charger solution 600ma between ) ---------------- 2. [34063 + NPN (NMOS)] Spread- flow car charger schematic plan Pros: On the basis of [ a ] plan on expanding to meet growing demand streaming charging current capability Disadvantages: there are also [ 1 ] lack of similar programs ---------------- 3 [ 2576 +358 + by the regulator ] Advantages : ( 1 ) Since 2576 the built-in over-current protection , over temperature protection and other security measures , combined with 358 ( dual op amp ) to achieve constant output CV, CC CC, overvoltage protection OVP functions ; achieve a reliable, safe , sound lithium battery charging program ( 2 ) Since the 52K PWM inverter 2576 is fixed , so that the EMI car design is relatively easy filling ( 3 ) Since 2576 and 358 are 40V high-voltage bipolar process , more " rugged " ( 4 ) This approach is often used in 0.8A ~ 1.5A about the car charger in ; Disadvantages: ( 1 ) The system is relatively complex, high cost ( 2 ) constant-current and over-voltage protection OVP CC 358 is to control the output of EN 2576 to achieve, and therefore a relatively large charging current ripple , the response speed is not fast enough CC and OVP ( whether by switching 2576 work to achieve ) ----------------
4. [XLSEMI monolithic design car charger IC] Field -based car charger system requirements , in addition to conventional internal overcurrent protection, over temperature protection, output short circuit protection , but also a built- in lithium rechargeable dedicated CV, CC, OVP; Equivalent to [ 3 ] program in 2576 +358 + regulator function modules all integrated into one IC in Advantages : In addition to the advantages [ 3 ] corresponding to the program , there are : ( 1 ) dedicated to the car charger fully integrated solution , low system cost, high reliability (2) IC internal CV, CC, OVP is achieved by controlling the PWM ; therefore , higher accuracy of the output voltage, output current, output overvoltage protection , fast response ( 3 ) Long -core charge current between 0A ~ 3A car charger series of cost-effective products ---------------- 5. [XLSEMI Car Charger Series ] Model XL4001 XL4002 XL4101 XL4102 Switching frequency 150KHZ 52KHZ 150KHZ 52KHZ Output current 2A 2A 3A 3A Package SOP8-EP SOP8-EP TO263-5L TO263- =================================
【Features Terminology】 Car Charger for the convenience of owners with a vehicle power supply of digital products at any time for charging accessories. At present, some high-end car chargers typically include two USB ports , you can simultaneously charge two digital products . These products generally have overload protection, short circuit protection, high voltage input protection , high temperature protection, four heavy security protection features to ensure safe use . Car charger while in the car , but also home to realize car charger , direct charge , USB charging triple multifunctional purposes. Features: versatility, portability, fashion , security With the development of the automobile industry, car charger is widely used , showing versatility, portability, fashion features. This product -specific power management solutions , output current up to 1A, is the world 's fastest USB charger to charge . --------------- 1 [ functionality ] Which car charger with U.S. regulations, the British regulations , the Austrian and European regulatory compliance installed for four AC adapter ; The car charger, direct charge , USB charging as one, to meet the charge under different conditions ; Dual USB output interface, can be charged for multiple electronic products. And this product is the world 's first rechargeable battery charger for iPad , iPad charge of approximately four hours to complete , you can go for a ride with the iPad . --------------- 2 [ portable ] Portability is a major trend in today's electronic product development , MiLi Universal Charger uses a unique folding car charger design, product volume was concentrated to 6.9 × 5.6 × 3.1cm, extremely convenient to carry . ---------------
3 [ fashion ] For owners of the high-end consumer groups , car charger also valued fashion . General use ABS material and with piano paint process , not only sleek, feel very good . ---------------
4 [ Security ] The product passed the test of CCC, UL, FCC, CE and other international safety performance of each , and the insurance company guarantee , a strong safety and performance of consumer interests . ================================= 【Reserved Integrate / Just Reference】 【Translation is by The Network】 |
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