Schematic diagram of low-end car charger scheme realized by single chip 34063
Advantages: low cost;
Disadvantages: (1) Poor reliability, single function; no over temperature protection, short circuit protection and other safety measures;
(2) Although the output is a DC voltage, the way to control the output constant current charging current is the maximum switching current peak limit, and the accuracy is not high enough;
(3) Since 34063 is 1.5A switching current PWM+PFM mode (no error amplifier inside),
The ripple of the DC voltage and current output of the car charger solution is relatively large and not pure enough; the output current capability is also very limited; (common in the low-end car charger scheme between 300ma and 600ma)
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