Overview
The STBC02JR, produced by STMicroelectronics, is a highly integrated power management IC designed for charging single-cell Li-Ion batteries. It incorporates a linear battery charger, a 150 mA Low Dropout (LDO) regulator, two Single-Pole Double-Throw (SPDT) load switches, a smart reset/watchdog block, and a protection circuit module (PCM) to prevent battery damage under fault conditions. The device uses a Constant Current/Constant Voltage (CC/CV) algorithm for charging and features programmable fast charge and pre-charge currents, as well as an adjustable floating voltage up to 4.45 V. It also includes automatic power path management, an auto-recharge function, and various protection mechanisms such as overcharge, over-discharge, and overcurrent protections.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Fast Charge Current | Programmable fast charge current | Up to 450 mA | mA |
| Pre-charge Current | Programmable pre-charge current | 1 mA to 450 mA | mA |
| Floating Voltage | Adjustable floating voltage | Up to 4.45 V | V |
| LDO Output Current | LDO regulator output current | 150 mA | mA |
| Load Switches | Number and type of load switches | 2 SPDT, 3 Ω each | - |
| Operating Temperature | Operating ambient temperature range | -40 to +85 °C | °C |
| Package | Type and size of the package | Flip Chip 30, 0.4 mm pitch | - |
| ESD Protection | Human Body Model (HBM) ESD protection | ±4 kV | V |
Key Features
- Charges single-cell Li-Ion batteries with CC/CV algorithm and charge termination
- Fast charge current up to 450 mA and pre-charge current from 1 mA to 450 mA
- Adjustable floating voltage up to 4.45 V
- Integrated low quiescent LDO regulator
- Automatic power path management and auto-recharge function
- Embedded protection circuit module (PCM) featuring battery overcharge, over-discharge, and overcurrent protections
- Charging timeout for safety reasons
- Shipping mode feature allows low battery leakage when over-discharged
- Very low battery leakage in over-discharge and shutdown mode
- Charge/fault status output and battery voltage pin for external gauging
- Reset generator triggered by USB detection and SWIRE control for STBC02 functions
- Rugged ±4 kV HBM ESD protection on critical pins
Applications
- Smart watches and wearable devices
- Fitness and medical accessories
- Li-Ion and other Li-Poly battery rechargeable equipment
- Industrial and personal electronics requiring efficient battery management
Q & A
- What is the STBC02JR used for?
The STBC02JR is used for charging single-cell Li-Ion batteries and managing power in various electronic devices.
- What charging algorithm does the STBC02JR use?
The STBC02JR uses a Constant Current/Constant Voltage (CC/CV) algorithm for charging.
- What is the maximum fast charge current of the STBC02JR?
The maximum fast charge current of the STBC02JR is up to 450 mA.
- How is the floating voltage adjusted on the STBC02JR?
The floating voltage on the STBC02JR can be adjusted up to 4.45 V using dedicated resistors.
- What types of protection does the STBC02JR offer?
The STBC02JR offers protection against battery overcharge, over-discharge, and overcurrent, as well as charging timeout for safety reasons.
- What is the purpose of the LDO regulator in the STBC02JR?
The LDO regulator in the STBC02JR provides a stable output voltage of up to 150 mA.
- How does the STBC02JR manage power paths?
The STBC02JR features automatic power path management to ensure efficient power distribution.
- What is the shipping mode feature of the STBC02JR?
The shipping mode feature of the STBC02JR allows for low battery leakage when the battery is over-discharged, maximizing battery life during shelf life.
- How is the STBC02JR protected against ESD?
The STBC02JR has rugged ±4 kV Human Body Model (HBM) ESD protection on the most critical pins.
- In what package is the STBC02JR available?
The STBC02JR is available in a Flip Chip 30 package with a 0.4 mm pitch.
