BQ24070RHLR

Product Overview

Category

BQ24070RHLR 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 BQ24070RHLR features a highly efficient power management system that maximizes the charging efficiency.
• Fast charging: It supports fast charging capabilities, allowing for quicker battery recharge times.
• Compact package: The IC comes in a small and compact package, making it suitable for space-constrained designs.
• Low power consumption: It has low quiescent current, ensuring minimal power loss during standby or idle modes.
• Overvoltage protection: The BQ24070RHLR incorporates overvoltage protection to prevent damage to the battery and connected devices.

Package and Quantity

The BQ24070RHLR is available in a small outline package (SOP) with 20 pins. It is typically sold in reels containing 2500 units per reel.

Specifications

• Input voltage range: 4.35V to 6.45V
• Charging voltage: 4.2V
• Maximum charging current: 1.5A
• Operating temperature range: -40°C to +85°C
• Standby current: 50µA

Pin Configuration

The BQ24070RHLR has the following pin configuration:

1. VBUS: Input voltage from the USB port
2. AC/DC: Input voltage from an AC/DC adapter
3. STAT: Status output indicating charging status
4. PG: Power good output indicating charging completion
5. TS: Temperature sense input for thermal regulation
6. EN: Enable input to control charging
7. ISET: Charging current setting input
8. VSS: Ground reference
9. VBAT: Battery voltage output
10. VOUT: Output voltage for system power

Functional Features

• Constant current/constant voltage (CC/CV) charging algorithm
• Thermal regulation to prevent overheating during charging
• Charge termination based on battery voltage and temperature
• Automatic recharge initiation after battery discharge
• Reverse current protection to prevent battery drain
• Soft-start feature to limit inrush current during charging

Advantages and Disadvantages

Advantages

• High charging efficiency leads to faster charging times.
• Compact package allows for space-saving designs.
• Overvoltage protection ensures safety for the battery and connected devices.
• Low quiescent current minimizes power loss during standby.

Disadvantages

• Limited maximum charging current of 1.5A may not be suitable for high-capacity batteries.
• Operating temperature range may restrict usage in extreme environments.

Working Principles

The BQ24070RHLR utilizes a CC/CV charging algorithm to charge lithium-ion batteries. It starts with a constant current mode until the battery voltage reaches the programmed threshold. Then, it switches to constant voltage mode, maintaining a steady voltage while reducing the charging current. The IC continuously monitors the battery voltage and temperature to ensure safe and efficient charging.

Application Field Plans

The BQ24070RHLR is widely used in various portable electronic devices, including smartphones, tablets, smartwatches, and wireless earphones. Its compact size, high efficiency, and integrated protection features make it an ideal choice for these applications.

Alternative Models

• BQ24072RHLR: Similar to BQ24070RHLR but with a higher maximum charging current of 2A.
• BQ24075RHLR: Similar to BQ24070RHLR but with an extended operating temperature range of -40°C to +125°C.
• BQ24078RHLR: Similar to BQ24070RHLR but with additional USB OTG (On-The-Go) functionality.

These alternative models provide similar functionality with slight variations in specifications, catering to different application requirements.

In conclusion, the BQ24070RHLR is a highly efficient and compact IC designed for charging lithium-ion batteries in portable electronic devices. Its features, specifications, and wide range of applications make it a popular choice among designers in the industry.

Word count: 570 words