产品概要
描述
The STC4054 is a constant current/constant voltage charger for single cell Li-Ion batteries. No external sense resistor or blocking diode is required and its ThinSOT package make it ideally suited for portable applications.
The STC4054 is designed to work within USB power specifications. An internal block regulates the current when the junction temperature increases, in order to protect the device when it operates in high power or high ambient temperature.
The charge voltage is fixed at 4.2V, and the charge current limitation can be programmed using a single resistor connectd between PROG pin and GND. The charge cycle is automatically terminated when the current flowing to the battery is 1/10 of the programmed value. If the external adaptor is removed, the STC4054 turns off and a 2µA current can flow from the battery to the device. The device can be put into Shutdown Mode, reducing the supply current to 25µA. The device also has a charge current monitor, under voltage lockout, automatic recharge. The device is packaged in TSOT23-5L.
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性能一览
- 25µA supply current in shutdown mode
- C/10 charge termination
- Soft-start limits inrush current
- Low battery voltage detect for precharge setting
- TSOT23-5L package
- Single charge status output pin
- Automatic recharge
- Programmable charge current up to 800mA
- Constant current / constant voltage operation with thermal regulation to maximize charge rate without risk of overheating
- No external MOSFET, sense resistors or blocking diode required
- Preset 4.2V charge voltage with 1% accuracy
- Charge current monitor output for gas gauging
- Charges single cell li-ion batteries directly from USB port
电路原理图
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STMicroelectronics - STC4054
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | 符合RoHS级别 | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| STC4054GR | Active 产品已量产 | TSOT23-5L | Industrial | Ecopack2 | - | - |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
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Sample & Buy
| Part Number | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| STC4054GR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
STC4054GR Active