BQ24251YFFR

Product Overview

Category

BQ24251YFFR belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging single-cell lithium-ion or lithium-polymer batteries in various portable electronic devices such as smartphones, tablets, and wearable devices.

Characteristics

• Input voltage range: 3.9V to 6.2V
• Output voltage range: 3.9V to 6.2V
• Charging current range: Up to 2A
• Programmable charge current limit
• Integrated power path management
• Thermal regulation and protection
• Battery temperature monitoring
• Status indication through LED outputs

Package

The BQ24251YFFR is available in a small footprint, 20-pin, 2.5mm x 2.5mm, wafer-level chip scale package (WCSP).

Essence

The essence of the BQ24251YFFR lies in its ability to efficiently and safely charge lithium-ion or lithium-polymer batteries while providing essential features like power path management and thermal regulation.

Packaging/Quantity

The BQ24251YFFR is typically sold in reels containing 3000 units per reel.

Specifications

• Input voltage range: 3.9V to 6.2V
• Output voltage range: 3.9V to 6.2V
• Charging current range: Up to 2A
• Programmable charge current limit: 50mA to 2000mA
• Operating temperature range: -40°C to +85°C
• Battery voltage regulation accuracy: ±0.5%
• Power path efficiency: Up to 94%

Detailed Pin Configuration

1. EN/STAT: Enable/Input status pin
2. TS: Battery temperature sense input
3. VBUS: Input voltage from USB port
4. PGND: Power ground
5. SYS: System output voltage
6. BAT: Battery terminal
7. ISET: Charge current programming pin
8. ILIM: Input current limit programming pin
9. PROG: Programming pin for various features
10. INTVCC: Internal voltage regulator output
11. SDA: I2C data input/output
12. SCL: I2C clock input
13. TMR: Timer resistor connection
14. SRN: Sense resistor connection
15. D+/D-: USB data lines
16. AC/DPDM: Accessory detection input
17. AC/DP: Accessory detection input
18. AC/DM: Accessory detection input
19. AC/ID: Accessory detection input
20. GND: Ground

Functional Features

1. Integrated power path management allows simultaneous charging and discharging.
2. Programmable charge current limit enables flexibility in battery charging.
3. Thermal regulation and protection prevent overheating and ensure safe operation.
4. Battery temperature monitoring ensures optimal charging conditions.
5. LED outputs provide status indication for charging progress.

Advantages and Disadvantages

Advantages

• Efficient and safe charging of lithium-ion or lithium-polymer batteries.
• Integrated power path management allows device usage during charging.
• Programmable charge current limit offers flexibility in charging different battery capacities.
• Thermal regulation and protection prevent damage due to overheating.
• Battery temperature monitoring ensures optimal charging conditions.

Disadvantages

• Limited to single-cell battery charging applications.
• Requires additional external components for complete functionality.
• Relatively small package size may require careful handling during assembly.

Working Principles

The BQ24251YFFR operates by regulating the charging current and voltage to the connected lithium-ion or lithium-polymer battery. It utilizes a power path management system that allows the device to charge the battery while simultaneously powering the connected electronic device. The integrated thermal regulation and protection mechanisms ensure safe operation by monitoring the temperature and preventing overheating.

Detailed Application Field Plans

The BQ24251YFFR is widely used in various portable electronic devices, including but not limited to: - Smartphones - Tablets - Wearable devices - Portable gaming consoles - Bluetooth headsets - Portable speakers

Detailed and Complete Alternative Models

1. BQ24250YFFR
2. BQ24252YFFR
3. BQ24253YFFR
4. BQ24254YFFR
5. BQ24255YFFR

These alternative models offer similar functionality and features, with slight variations in specifications and pin configurations. They can be considered as alternatives depending on specific application requirements.

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