欠压保护，防止充电电压过低。过温保护，防止充电温度过高。
Car charger 12v to 5v3.1A chip solution: intelligent identification chip, intelligent matching of required current, case charging does not damage the mobile phone, power management chip, with protection functions such as overvoltage, overcurrent, overtemperature and overpower.
The car charger 12v to 5v3.1A chip solution is universal for cars and trucks, suitable for mainstream models on the market, and 12v-24 can be used.
Short-circuit protection, automatically cut off the circuit when short-circuited. Overpower protection to prevent excessive charging power.
Overvoltage protection to prevent excessive charging voltage. Over-current protection to prevent excessive charging current.
Under-voltage protection to prevent the charging voltage from being too low. Over-temperature protection to prevent the charging temperature from being too high.车充12v转5v3.1A芯片方案：QT5460
其他12v转5v1.5A芯片：QT5213 
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