BQ24253RGER

Product Overview

Category

BQ24253RGER belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

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

Characteristics

• High efficiency: The BQ24253RGER offers high charging efficiency, minimizing power loss during the charging process.
• Fast charging: It supports fast charging protocols, allowing for quicker battery recharge times.
• Compact package: The IC comes in a small form factor package, making it suitable for space-constrained designs.
• Integrated protection features: It incorporates various protection mechanisms to safeguard the battery and the charging circuitry against overvoltage, overcurrent, and overtemperature conditions.

Package and Quantity

The BQ24253RGER is available in a 24-pin VQFN (Very Thin Quad Flat No-Lead) package. It is typically sold in reels containing a specified quantity of ICs.

Specifications

• Input voltage range: 4.35V to 6.45V
• Charging current range: Up to 2A
• Programmable charging parameters: Voltage, current, and termination thresholds
• Operating temperature range: -40°C to 85°C
• Standby current: Less than 100µA

Pin Configuration

The BQ24253RGER has a total of 24 pins, each serving a specific function. The pin configuration is as follows:

1. VIN: Input voltage
2. GND: Ground reference
3. TS: Temperature sense input
4. STAT: Status output
5. CE: Charge enable input
6. ISET: Current limit programming
7. PROG: Programming resistor connection
8. VBUS: USB input voltage
9. VSS: Negative supply voltage
10. VBAT: Battery voltage output
11. TS/NTC: Temperature sense or NTC input
12. VREF: Reference voltage output
13. SRN: Serial resistor network connection
14. SCL: I2C serial clock input
15. SDA: I2C serial data input/output
16. INT: Interrupt output
17. ILIM: Current limit programming
18. PG: Power good output
19. BATFET: Battery FET control
20. SYS: System voltage output
21. VBUSGATE: VBUS gate drive output
22. TS/NTCGND: Temperature sense or NTC ground reference
23. VDD: Positive supply voltage
24. VREG: Regulated output voltage

Functional Features

• Dynamic power management: The BQ24253RGER dynamically adjusts the charging current and voltage based on the battery's state of charge, optimizing the charging process.
• Thermal regulation: It incorporates a thermal regulation feature to prevent overheating during charging, ensuring safe operation.
• Charge termination: The IC automatically terminates the charging process when the battery reaches its full capacity, preventing overcharging and potential damage to the battery.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced power loss.
• Fast charging capability reduces overall charging time.
• Integrated protection mechanisms enhance safety.
• Compact package size enables space-saving designs.

Disadvantages

• Limited compatibility with certain battery chemistries.
• Relatively higher cost compared to some alternative models.

Working Principles

The BQ24253RGER operates by regulating the charging current and voltage supplied to the lithium-ion battery. It continuously monitors the battery's voltage and temperature, adjusting the charging parameters accordingly. The IC employs a switching regulator to efficiently convert the input voltage to the desired charging voltage, minimizing power dissipation.

Detailed Application Field Plans

The BQ24253RGER is widely used in various portable electronic devices, including smartphones, tablets, smartwatches, and wireless earbuds. Its compact size, high efficiency, and fast charging capabilities make it suitable for applications where space is limited, and quick battery recharge is desired.

Alternative Models

• BQ24250RGET
• BQ24251RGET
• BQ24252RGET
• BQ24254RGET

These alternative models offer similar functionality and can be considered as substitutes for the BQ24253RGER in specific applications.

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