BQ24007PWPR

Product Overview

Category

BQ24007PWPR 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 portable electronic devices such as smartphones, tablets, and wearable devices.

Characteristics

• Input voltage range: 4.35V to 6.45V
• Output voltage range: 3.5V to 4.44V
• Charging current up to 1A
• Integrated power FET
• Thermal regulation and protection
• Charge status indication
• Small form factor package

Package

BQ24007PWPR is available in a small 20-pin HTSSOP package, which ensures efficient heat dissipation during operation.

Essence

The essence of BQ24007PWPR lies in its ability to provide a reliable and efficient charging solution for lithium-ion and lithium-polymer batteries, ensuring optimal performance and extended battery life.

Packaging/Quantity

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

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Output Voltage Range: 3.5V to 4.44V
• Charging Current: Up to 1A
• Operating Temperature Range: -40°C to +85°C
• Standby Current: < 100µA
• Charge Voltage Accuracy: ±0.5%
• Charge Current Accuracy: ±5%
• Battery Regulation Voltage Accuracy: ±1%
• Thermal Regulation Threshold: 120°C

Detailed Pin Configuration

1. VBUS: Input voltage from USB port
2. PGND: Power ground
3. STAT: Charge status output
4. TS: Thermal sense input
5. VSS: Ground
6. ISET: Charge current setting
7. EN: Enable control input
8. BAT: Battery voltage output
9. VDD: Supply voltage
10. VREG: Regulated output voltage
11. PROG: Programming resistor connection
12. TS/NTC: Thermistor input for thermal regulation
13. ILIM: Current limit programming
14. SDA: I2C data input/output
15. SCL: I2C clock input
16. INT: Interrupt output
17. VBUS_STAT: USB voltage status
18. VBUSSTATEN: USB voltage status enable
19. NTC_STAT: Thermistor status
20. NTCSTATEN: Thermistor status enable

Functional Features

1. Integrated Power FET: BQ24007PWPR incorporates an integrated power FET, eliminating the need for an external switch and reducing component count.
2. Thermal Regulation and Protection: The device includes a thermal regulation feature that prevents overheating during charging, ensuring safe operation. It also provides protection against over-temperature conditions.
3. Charge Status Indication: BQ24007PWPR offers a charge status output pin (STAT) that provides information about the charging process, allowing the user to monitor the battery's state.
4. Programmable Charge Current: The charge current can be set using an external resistor connected to the ISET pin, providing flexibility in charging different battery capacities.
5. Small Form Factor Package: The HTSSOP package ensures compactness and efficient heat dissipation, making it suitable for space-constrained applications.

Advantages and Disadvantages

Advantages

• Integrated power FET simplifies circuit design and reduces component count.
• Thermal regulation protects the device and battery from overheating.
• Charge status indication allows easy monitoring of the charging process.
• Programmable charge current enables flexibility for different battery capacities.
• Small form factor package ensures space efficiency and effective heat dissipation.

Disadvantages

• Limited to single-cell lithium-ion or lithium-polymer battery charging applications.
• Requires additional external components for complete charging circuit implementation.

Working Principles

BQ24007PWPR operates based on a constant current/constant voltage (CC/CV) charging algorithm. Initially, it provides a constant current to the battery until the battery voltage reaches a predetermined threshold. Then, it switches to a constant voltage mode, maintaining the battery voltage at the desired level while reducing the charging current. The device continuously monitors the battery temperature and adjusts the charging parameters accordingly to prevent overheating.

Detailed Application Field Plans

BQ24007PWPR finds extensive application in various portable electronic devices that utilize single-cell lithium-ion or lithium-polymer batteries. Some of the common application fields include:

1. Smartphones: BQ24007PWPR is widely used in smartphones to provide efficient and safe charging for their built-in batteries.
2. Tablets: This IC ensures reliable charging for tablet devices, enabling extended usage time