TP4056 lithium-ion battery 1A charging management chip solution

工作电流：

1.5A

工作温度：

90度

It is a linear charger specially designed for one-cell lithium-ion battery or lithium-polymer battery. The chip integrates a power transistor. The charging current can be set by an external resistor. The maximum continuous charging current can be reached without the need for additional blocking diodes and currents. detection resistor. Contains two open-drain output status indicating terminals, a charging status indicating output terminal and a charging completion indicating output terminal. When charging, the pin outputs a low level, indicating that charging is in progress. If the battery voltage is lower than..., precharge the battery with a small current. When the battery voltage exceeds., the battery is charged in constant current mode, and the charging current is determined by the resistor RR between the R pin and . When the battery voltage is close to .voltage, the charging current gradually decreases and enters constant voltage charging mode. When the charging current decreases to the charging end threshold, the charging cycle ends, the terminal outputs a high resistance state, and terminal B outputs a low potential. The charge end threshold is for constant current charging current. When the battery voltage drops below the recharge threshold, a new charging cycle automatically starts. The high-precision voltage reference source, error amplifier and resistor divider network inside the chip ensure that the accuracy of the battery terminal modulation voltage is within 100%, meeting the requirements of lithium-ion batteries and lithium-polymer batteries. When the input voltage is lower than the undervoltage lockout threshold voltage or the input voltage is lower than the battery voltage, the charger enters a low-power sleep mode. At this time, the current consumed by the battery is less than.
The internal intelligent temperature control circuit automatically reduces the charging current when the junction temperature of the chip exceeds ℃. This function allows users to maximize the power processing capabilities of the chip without worrying about damaging the chip or external components due to overheating. In this way, users do not need to consider the worst case when designing the charging current, but only design based on typical situations because in the worst case, the charging current will be automatically reduced.
If the enable input terminal is connected to low level, the charger will stop charging.