BQ24123RHLT

Product Overview

Category

BQ24123RHLT belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This IC is commonly used in portable electronic devices, such as smartphones, tablets, and wearable devices, to efficiently charge lithium-ion batteries.

Characteristics

• High charging efficiency
• Compact package size
• Low power consumption
• Wide input voltage range
• Multiple protection features (overvoltage, overcurrent, and thermal protection)
• Fast charging capability

Package

BQ24123RHLT is available in a small 20-pin QFN (Quad Flat No-Lead) package, which ensures easy integration into various electronic devices.

Essence

The essence of BQ24123RHLT lies in its ability to provide a reliable and efficient charging solution for lithium-ion batteries, ensuring optimal performance and extended battery life.

Packaging/Quantity

This IC is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.35V - 6.45V
• Charging Voltage Range: 3.5V - 4.44V
• Charging Current Range: 500mA - 2A
• Operating Temperature Range: -40°C to +85°C
• Standby Current: < 100µA
• Efficiency: > 90%
• Protection Features: Overvoltage, Overcurrent, Thermal Protection

Detailed Pin Configuration

1. VBUS: Input voltage from the power source
2. PGND: Power ground
3. SYS: System output voltage
4. BAT: Battery connection
5. TS: Thermistor input for temperature monitoring
6. ISET: Charging current setting pin
7. STAT: Status indication pin
8. EN: Enable pin for device control
9. ILIM: Input current limit setting pin
10. PROG: Programmable input voltage regulation
11. TS/NTC: Thermistor input or NTC thermistor connection
12. VREF: Reference voltage output
13. SDA: I2C data line
14. SCL: I2C clock line
15. INT: Interrupt output pin
16. SRN: Serial resistor network connection
17. SRP: Serial resistor network connection
18. SRSET: Serial resistor network connection
19. SRSET: Serial resistor network connection
20. GND: Ground

Functional Features

• Constant current and constant voltage charging modes
• Automatic battery detection and charging initiation
• Charge termination based on battery voltage and temperature
• Dynamic power management for efficient charging
• I2C interface for advanced configuration and monitoring

Advantages and Disadvantages

Advantages

• High charging efficiency ensures faster charging times
• Wide input voltage range allows compatibility with various power sources
• Multiple protection features safeguard the battery and the charging circuitry
• Compact package size enables easy integration into space-constrained devices

Disadvantages

• Requires additional external components for complete charging circuit implementation
• Limited availability of alternative models from other manufacturers

Working Principles

BQ24123RHLT operates by regulating the charging current and voltage to ensure safe and efficient charging of lithium-ion batteries. It employs a constant current mode initially to rapidly charge the battery until a predefined voltage threshold is reached. Then, it switches to constant voltage mode to provide a controlled charging current until the battery is fully charged.

The IC continuously monitors the battery voltage and temperature to prevent overcharging, overvoltage, and overheating. It also incorporates dynamic power management techniques to optimize charging efficiency and minimize power losses.

Detailed Application Field Plans

BQ24123RHLT finds extensive application in various portable electronic devices, including smartphones, tablets, smartwatches, and wireless earphones. It is particularly suitable for devices that require fast charging capabilities while ensuring battery safety and longevity.

Detailed and Complete Alternative Models

While BQ24123RHLT is a highly reliable and widely used IC, there are alternative models available from different manufacturers that offer similar functionality. Some notable alternatives include:

• MCP73831 by Microchip Technology
• MAX1555 by Maxim Integrated
• LTC4054 by Linear Technology

These alternative models can be considered based on specific design requirements and availability.

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