复件 tp4056_42_english_空页脚.doc

TP4056 1A Standalone Linear Li-lon Battery Charger with Thermal 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.
FEATURES
ABSOLUTE MAXIMUM RATINGS
·Input Supply Voltage(VCC)：-0.3V～8V ·BAT Short-Circuit Duration：Continuous ·Operating Ambient Temperature Range：-40 ·Charges Single Cell Li-Ion Batteries Directly APPLICATIONS
·Digital Still Cameras, Portable Devices ·2.9V Trickle Charge Threshold (TP4056) ·Soft-Start Limits Inrush Current ·Available Radiator in 8-Lead SOP Package, Complete Charge Cycle (1000mAh
Battery)
PACKAGE/ORDER INFORMATION
ORDER PART NUMBER
PART MARKING TP4056
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
measure the charge current as follows:
GND(Pin3): Ground Terminal
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 (Pin7): Open Drain Charge Status Output When the battery is being charged, the
pin is pulled low by an internal switch, otherwise 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 ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise
specifications are at TA=25℃，VCC =5V，unless otherwise noted.
Connected,VCC < VBAT, or VCC < VUV) indicator light state
Rprog Current Setting

TYPICAL APPLICATIONS

Source: http://www.dfrobot.com.cn/image/data/DFR0208/TP4056.pdf