Overview
The BQ2057WSN is a linear battery charger management IC produced by Texas Instruments. Designed for compact portable electronics, it supports charging for two-cell lithium-ion (Li-ion) and lithium-polymer (Li-pol) batteries. With a 15V input and 8.4V/2A charging capability, this IC is ideal for applications requiring precise and efficient battery management. Its market positioning targets portable devices such as medical equipment, consumer electronics, and remote telemetry systems, offering a competitive edge with its integrated safety features, high accuracy, and minimal external component requirements.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Battery Type | Li-ion, Li-pol | - | - |
| Input Voltage | 4.5 to 15 | V | - |
| Charging Voltage | 8.4 | V | - |
| Charging Current | 2000 | mA | - |
| Operating Temperature | -20 to +70 | °C | - |
| Package | SOIC-8 | - | - |
| Dimensions | 4.9 x 3.91 x 1.58 | mm | - |
| Voltage Regulation Accuracy | ±1% | - | Preset voltage |
| Pin Count | 8 | - | - |
| Mounting Type | Surface Mount | - | - |
Key Features
- Integrated voltage and current regulation with programmable charging current.
- Dynamic compensation for battery internal impedance to reduce charging time.
- Optional battery temperature monitoring for enhanced safety.
- Integrated battery conditioning for recovering deeply discharged cells.
- Low-power sleep mode when VCC is removed.
- Single or dual LED interface for charging status indication.
Applications
The BQ2057WSN is widely used in portable electronics, including medical devices, consumer electronics, and remote telemetry systems. Its precise charging management and safety features make it ideal for applications requiring reliable battery performance. Additionally, it is suitable for emergency call systems, gaming accessories, and EPOS card readers, where efficient power management is critical.
Q & A
1. What is the input voltage range for the BQ2057WSN?
The input voltage range is 4.5V to 15V.
2. What types of batteries does the BQ2057WSN support?
It supports lithium-ion (Li-ion) and lithium-polymer (Li-pol) batteries.
3. What is the maximum charging current?
The maximum charging current is 2000mA.
4. Does the BQ2057WSN include temperature monitoring?
Yes, it includes optional battery temperature monitoring for safety.
5. What is the voltage regulation accuracy?
The voltage regulation accuracy is ±1% at the preset voltage.
6. What is the operating temperature range?
The operating temperature range is -20°C to +70°C.
7. What package does the BQ2057WSN come in?
It comes in an SOIC-8 package.
8. Can the BQ2057WSN recover deeply discharged batteries?
Yes, it includes integrated battery conditioning for this purpose.
9. Does the BQ2057WSN support low-power sleep mode?
Yes, it automatically enters low-power sleep mode when VCC is removed.
10. What applications is the BQ2057WSN suitable for?
It is suitable for portable medical devices, consumer electronics, and remote telemetry systems.
