BQ24157YFFT

Introduction

The BQ24157YFFT is a highly integrated single-cell Li-Ion battery charger with power path management for use in a wide range of portable applications. This device offers a complete power solution for space-constrained, multi-function portable devices.

Basic Information Overview

• Category: Battery Charger
• Use: Charging single-cell Li-Ion batteries
• Characteristics: Highly integrated, power path management
• Package: 24-pin, 4mm x 4mm QFN package
• Essence: Efficient and compact charging solution
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier

Specifications

• Input Voltage Range: 3.9V to 6.2V
• Charge Voltage: 4.2V
• Maximum Charge Current: 2A
• Termination Current: 10% of the maximum charge current
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

1. VIN (Input voltage)
2. TS (Thermal shutdown)
3. CE (Charge enable)
4. STAT (Charging status output)
5. BAT (Battery connection)
6. SYS (System power)
7. PG (Power good indication)
8. PROG (Charge current programming)

Functional Features

• Integrated power FETs for up to 2A charge rate
• Thermal regulation and protection
• Input current limit and dynamic power management
• Automatic input power detection
• Battery temperature sensing and thermal monitoring

Advantages and Disadvantages

Advantages - Compact size and high integration - Power path management enables simultaneous battery charging and system operation - Wide input voltage range for versatile applications

Disadvantages - Limited to single-cell Li-Ion battery charging - Higher cost compared to basic linear chargers

Working Principles

The BQ24157YFFT utilizes a combination of power path management and integrated FETs to efficiently charge a single-cell Li-Ion battery while providing power to the system. It employs thermal regulation and input current limit to ensure safe and reliable charging.

Detailed Application Field Plans

• Portable consumer electronics
• Wearable devices
• Handheld medical devices
• Portable industrial equipment

Detailed and Complete Alternative Models

• BQ24158YFFT
• BQ24159YFFT
• BQ24210

In conclusion, the BQ24157YFFT offers a comprehensive charging solution for single-cell Li-Ion batteries in a compact and efficient package. Its integrated features and wide application field plans make it an ideal choice for various portable electronic devices.

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