BQ24085DRCTG4

Product Overview

Category

BQ24085DRCTG4 belongs to the category of battery charger ICs (Integrated Circuits).

Use

This product is primarily used for charging single-cell lithium-ion or lithium-polymer batteries.

Characteristics

• Input voltage range: 4.35V to 6.45V
• Output voltage range: 3.5V to 4.44V
• Charging current: Up to 1.5A
• Programmable charge termination current
• Thermal regulation and protection
• Integrated power FET
• Small package size: DRC (2x2 mm)

Package and Quantity

The BQ24085DRCTG4 is available in a small DRC package. It is typically sold in reels, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Precharge Current: 100mA
• Charge Termination Current: Programmable (10% to 100% of precharge current)
• Charge Voltage Accuracy: ±0.5%
• Charge Current Accuracy: ±5%
• Operating Temperature Range: -40°C to +85°C
• Package Type: DRC (2x2 mm)

Pin Configuration

The BQ24085DRCTG4 has the following pin configuration:

1. VBUS: Input voltage from USB port
2. STAT: Status output pin
3. PG: Power good output pin
4. TS: Thermistor input pin
5. BAT: Battery voltage sense pin
6. SRN: Sense resistor negative terminal
7. SRP: Sense resistor positive terminal
8. GND: Ground
9. ISET: Charge current programming pin
10. EN: Enable control pin

Functional Features

• Integrated power FET for charging
• Programmable charge termination current
• Thermal regulation and protection
• Power good output pin for status indication
• Enable control pin for easy system integration
• Accurate charge voltage and current control

Advantages and Disadvantages

Advantages

• Small package size allows for space-efficient designs
• Programmable charge termination current provides flexibility
• Integrated power FET simplifies the circuit design
• Accurate charge voltage and current control ensures safe charging

Disadvantages

• Limited input voltage range may not be suitable for all applications
• Charge current accuracy could be improved for more precise charging

Working Principles

The BQ24085DRCTG4 operates by regulating the charging current and voltage to safely charge single-cell lithium-ion or lithium-polymer batteries. It uses an integrated power FET to control the charging process. The charge termination current can be programmed to suit different battery capacities. The IC also incorporates thermal regulation and protection features to prevent overheating.

Detailed Application Field Plans

The BQ24085DRCTG4 is commonly used in portable electronic devices such as smartphones, tablets, and wearable devices. It is suitable for applications where a single-cell lithium-ion or lithium-polymer battery needs to be charged efficiently and safely.

Detailed and Complete Alternative Models

1. BQ24075RGTR: Similar functionality with a different package type (RGTR)
2. BQ24072RGTT: Lower charging current capability but compatible with wider input voltage range
3. BQ24086DRCTG4: Higher charging current capability with similar specifications and package size

These alternative models offer similar features and can be considered based on specific application requirements.

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