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BL4056 Dataheets PDF



Part Number BL4056
Manufacturers BELLING
Logo BELLING
Description 1A Lithium Ion Battery Linear Charger
Datasheet BL4056 DatasheetBL4056 Datasheet (PDF)

BL4056 1A Lithium Ion Battery Linear Charger BL4056 General Description BL4056 is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. With a thermally enhanced 8-PIN SOP package on the bottom and low external component count make the BL4056 ideally suited for portable applications. Furthermore the BL4056 is specifically designed to work within USB power specifications. No external sense resistor is needed and no blocking diode is required due to th.

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BL4056 1A Lithium Ion Battery Linear Charger BL4056 General Description BL4056 is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. With a thermally enhanced 8-PIN SOP package on the bottom and low external component count make the BL4056 ideally suited for portable applications. Furthermore the BL4056 is specifically designed to work within USB power specifications. No external sense resistor is needed and no blocking diode is required due to the internal PMOSFET architecture .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/4.34V,and the charge current can be programmed externally with a single resistor. The BL4056 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed the BL4056 automatically enters a low current state dropping the battery drain current to less than 2µA.The BL4056 can be put into shutdown mode reducing the supply current to 55µA. Other features include Battery temperature monitor, under-voltage lockout, automatic recharge and two status pins to indicate charge and charge termination. Features ●Protection of battery cell reverse connection ● Programmable charge current up to 1A ●No MOSFET sense resistor or blocking diode required ●Complete linear Charger in SOP8 Package for single Cell Lithium-Ion Batteries. ●Constant-Current/Constant-Voltage operation with thermal regulation to maximize Rate TyWpiicthaolucthriasrkgoefcoyvcelreh(ea1t0in0g0.mAh battery) ● Preset 4.2V/4.34V charge voltage with ±1% accuracy ● Automatic Recharge ● Two Status Indication for Charge status, no battery and battery failure indicators ● C/10 charge termination ● 55µA supply current in shutdown ● 2.9V trickle current charge threshold ● Soft-Start limits inrush current ● Battery Temperature Sensing Applications ●Cellular Telephones ●Digital Still Cameras ●MP3 Players ●Bluetooth Applications ●Portable Devices ●USB Bus-Powered Chargers Page1 www.belling.com.cn V1.4 Typical charge cycle(1000mAh battery) BL4056 Ordering Information Package Information BL4056- VV X XX Package: EP: ESOP8 Features: P: Standard (default, lead free) C: Customized Part Number BL4056-42 BL4056-43 Top Mark 4056 AXYY ZZ 4056 BXYY ZZ Output Voltage 42:4.2V 43:4.34V Remark X: Year YY: Week ZZ: Internal Code Page2 www.belling.com.cn V1.4 Pin Configuration BL4056 Pin Assignment Pin Num. Symbol Function Temperature sense input Connecting TEMP pin to NTC thermistor’s output in Lithium ion battery pack. If TEMP 1 TEMP pin’s voltage is below 45% or above 80% of supply voltage VCC, this means that battery’s temperature is too low or too high, charging is suspended. The temperature sense function can be disabled by grounding the TEMP pin. Constant Charge Current Setting and Charge Current Monitor Pin The charge current is programmed by connecting a resistor RPROG from this pin to GND. When in precharge mode, the PROG pin’s voltage is regulated to 0.1V. When charging in constant-current mode this pin’s voltage is regulated to 1V. In all modes during 2 PROG charging, the voltage on this pin can be used to measure the charge current using the 3 4 5 6 7 8 Page3 GND VCC BAT CE following formula: Ground Positive input supply voltage Provides power to the internal circuit. When VCC drops to within 80mV of the BAT pin voltage, the BL4056 enters low power sleep mode, dropping IBAT to less than 2µA. Battery connection Pin Connect the positive terminal of the battery to this pin. Dropping BAT pin’s current to less than 2µA when IC in disable mode or in sleep mode. BAT pin provides charge current to the battery and provides regulation voltage of 4.2V/4.34V. Charge terminated status output is pulled low by an internal switch to indicate a battery charge terminated; this means Charge termination. Otherwise pin is in high impedance state. 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. 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 BL4056 into disable mode. The CE pin can be driven by TTL or CMOS logic level. www.belling.com.cn V1.4 Block Diagram BL4056 Absolute Maximum Ratings Parameter Input supply voltage : VCC PROG pin voltage BAT pin voltage TEMP pin voltage pin voltage pin voltage CE pin voltage Rating -0.3~8 -0.3~VCC+0.3 -0.3~7 -0.3~10 -0.3~10 -0.3~10 -0.3~10 Unit V V V V V V V BAT pin current 1200 mA PROG pin current Maximum junction temperature Operating ambient temperature :Topa Storage temperature :Tstr Soldering temperature and time 1200 145 -40~85 -65~125 +260(Recommended 10S) µA ℃ ℃ ℃ ℃ Caution: The a.


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