STw4102 Dual source USB Li-ion charger with gas gauge
The STw4102 is a stand-alone constant-current constant-voltage (CCCV) linear charger dedicated for Li-Ion battery.
The STw4102 allows dual charging capability using the main input adaptor up to 1A (Wall adaptor, Car adaptor) or USB cable up to 500mA without external component. Upper 1A charging is possible by adding just one external transistor.
The STw4102 offers programmable fast charge current up to 1A with external resistor. A thermal regulation circuitry limits the charge current against the die high power dissipation or high ambient temperature. An end of charge output pin indicates the charge termination when the fast charge current drops below 10% of the programmed current value.
The STw4102 contains an accurate gas gauge based on a 13 bit AD converter. External resistor is used between battery and ground to sense a charge/discharge curent. With a typical 30 mOhms resistor, current can be up to 2.5A
技术特性
- Constant current constant voltage (CCCV) charger
- Dual charging source (main adaptor or USB cable)
- Fast charge current control up to 1A for main adaptor and up to 500mA for USB
- Internal power device and sense resistor, option for external components for current higher than 1A
- Programmable charge voltage (4.1V, 4.2V, 4.3V, 4.35V) with 1% accuracy
- Thermal regulation
- Trickle charge mode at low battery voltage
- Main adaptor voltage up to 16V
- Battery overvoltage protection at 4.7V
- Gas gauge with 13 bit AD converter
- Battery voltage monitor with 7-12 bit ADC
- I²C interface for device monitoring and control
- Charge status output pin
- Power detection output pin
- Programmable watchdog security timer
- 4.7V LDO regulator (external pmos)
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功能框图
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STw4102 订购信息
| 订购型号 |
产品状态 |
美金价格 |
数量 |
封装 |
包装形式 |
温度范围 |
材料声明 |
| STW4102IQT |
Active |
|
1000 |
VFQFPN2 24 4x4x1.0 |
Tape And Reel |
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DATASHEET
| 描述 |
版本 |
大小 |
| STw4102 : DS5065: Dual USB/wall adapter Li-ion battery charger with gas gauge |
2 |
525KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2831: Using the STw4102 for Li-Ion battery charging and monitoring |
1 |
330KB |
| AN2726: Evaluation board user guidelines for the STw4102 single Li-ion cell battery charger including gas gauge |
1 |
691KB |
TECHNICAL NOTES
| 描述 |
版本 |
大小 |
| TN0070: Frequently asked questions about the STw4102 |
1 |
344KB |
USER MANUALS
| 描述 |
版本 |
大小 |
| UM0678: STEVAL-ISB008V1, USB Li-Ion battery charger and gas gauge, based on the STw4102 |
1 |
1285KB |
BOARDS AND TOOLS
| 型号 |
描述 |
| STEVAL-ISB006V1 |
Dual USB/wall adapter Li-Ion battery charger with gas gauge demonstration board based on the STw4102 |
| STEVAL-ISB008V1 |
Standalone USB Li-Ion battery charger demonstration board based on the STw4102 and STM32F103C6 |
