南京拓微集成电路有限公司

NanJing Top Power ASIC Corp.

TP4056 1A Standalone Linear Li-lon Battery Charger with Thermal

Regulation in SOP-8

DESCRIPTION

The TP4056 is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. Its SOP package and low external component count make the TP4056 ideally suited for portable applications. Furthermore, the TP4056 can work within USB and wall adapter.

No blocking diode is required due to the internal PMOSFET architecture and have prevent to negative Charge Current Circuit. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The TP4056 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached.

TP4056 Other features include current monitor, under voltage lockout, automatic recharge and two status pin to indicate charge termination and the presence of an input voltage.

SOP??8

1

南京拓微集成电路有限公司 NanJing Top Power ASIC Corp.

TEMP(Pin 1) :Temperature Sense Input Connecting TEMP pin to NTC thermistor’s output in Lithium ion battery pack. If TEMP pin’s voltage is below 45% or above 80% of supply voltage VIN for more than 0.15S, this means that battery’s temperature is too high or too low, charging is suspended. The temperature sense function can be disabled by grounding the TEMP pin.

PROG(Pin 2): Constant Charge Current Setting and Charge Current Monitor Pin charge current is set by connecting a resistor RISET from this pin to GND. When in precharge mode, the ISET pin’s voltage is regulated to 0.2V. When in constant charge current mode, the ISET pin’s voltage is regulated to 2V.In all modes during charging, the voltage on ISET pin can be used to

Vcc(Pin 4): Positive Input Supply Voltage VIN is the power supply to the internal circuit. When VIN drops to within 30mv of the BAT pin voltage, TP4056 enters low power sleep mode, dropping BAT pin’s current to less than 2uA.

BAT(Pin5): Battery Connection Pin. Connect the positive terminal of the battery to BAT pin. BAT pin draws less than 2uA current in chip disable mode or in sleep mode. BAT pin provides charge current to the battery and provides regulation voltage of 4.2V.

(Pin6): Open Drain Charge Status Output When the battery Charge Termination, the

pin is pulled low by an internal switch, otherwise pin is in high impedance state.

(Pin7): Open Drain Charge Status Output When the battery is being charged, the

pin is pulled low by an internal switch, otherwise pin is in high impedance state.

CE(Pin8): Chip Enable Input. A high input will put the device in the normal operating mode. Pulling the CE pin to low level will put the YP4056 into disable mode. The CE pin can be driven by TTL or CMOS logic level.

ELECTRICAL CHARACTERISTICS

The ?? denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA=25℃，VCC =5V，unless otherwise noted.

2

南京拓微集成电路有限公司 NanJing Top Power ASIC Corp.

TYPICAL APPLICATIONS

3