Overview
The STC4054GR, produced by STMicroelectronics, is a standalone linear Li-Ion battery charger designed for single-cell lithium-ion batteries. It is particularly suited for portable applications due to its compact TSOT23-5L package and compliance with USB power specifications. The device integrates all necessary components, eliminating the need for external MOSFETs, sense resistors, or blocking diodes. It features constant current and constant voltage operation with thermal regulation to ensure safe and efficient charging.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Supply Voltage (VCC) | 4.25 to 6.5 | V |
| BAT Pin Voltage (VBAT) | -0.3 to 7 | V |
| PROG Pin Voltage (VPROG) | -0.3 to VCC+0.3 | V |
| BAT Pin Current (IBAT) | 800 | mA |
| PROG Pin Current (IPROG) | 800 | µA |
| Charge Voltage | 4.2 (with 1% accuracy) | V |
| Charge Current Limitation | Up to 800mA (programmable) | mA |
| Operating Junction Temperature | -40 to 85 | °C |
| Storage Temperature Range | -65 to 125 | °C |
| Thermal Resistance Junction-Ambient | 255 | °C/W |
| Package | TSOT23-5L |
Key Features
- Constant current and constant voltage operation with thermal regulation to maximize charge rate without overheating risk.
- No external MOSFET, sense resistors, or blocking diode required.
- Programmable charge current up to 800mA using a single resistor connected between the PROG pin and GND.
- Automatic recharge and single charge status output pin.
- Charge current monitor output for gas gauging.
- C/10 charge termination.
- Low battery voltage detect for precharge setting.
- Soft-start limits inrush current.
- 25µA supply current in shutdown mode.
Applications
- Cellular telephones.
- PDAs.
- Bluetooth applications.
- Battery-powered devices.
Q & A
- What is the primary function of the STC4054GR? The STC4054GR is a standalone linear Li-Ion battery charger designed for single-cell lithium-ion batteries.
- What package type does the STC4054GR use? The STC4054GR is packaged in a TSOT23-5L package.
- What is the programmable charge current range of the STC4054GR? The charge current can be programmed up to 800mA using a single resistor connected between the PROG pin and GND.
- Does the STC4054GR require external components like MOSFETs or sense resistors? No, the STC4054GR does not require external MOSFETs, sense resistors, or blocking diodes.
- What is the fixed charge voltage of the STC4054GR? The fixed charge voltage is 4.2V with 1% accuracy.
- How does the STC4054GR handle thermal regulation? The device has an internal block that regulates the current when the junction temperature increases to protect the device from overheating.
- What is the shutdown mode supply current of the STC4054GR? The supply current in shutdown mode is 25µA.
- Does the STC4054GR support automatic recharge? Yes, the STC4054GR supports automatic recharge.
- What is the charge termination criterion for the STC4054GR? The charge cycle is automatically terminated when the current flowing to the battery is 1/10 of the programmed value (C/10 charge termination).
- What are some typical applications of the STC4054GR? Typical applications include cellular telephones, PDAs, Bluetooth devices, and other battery-powered devices.
