Overview
The BQ24113RHLR is a compact, high-efficiency battery charge controller IC designed by Texas Instruments. It is specifically engineered for single-cell Li-ion and Li-polymer battery applications, commonly found in portable electronics such as smartphones, tablets, and wearable devices. The IC integrates a synchronous switching regulator, power MOSFET, and thermal regulation circuitry, providing a streamlined solution for battery charging. The device supports a wide input voltage range (typically 4.35V to 6.45V), making it versatile for various power sources. Its high switching frequency allows for the use of smaller external components, reducing the overall footprint of the charging circuit. The BQ24113RHLR is packaged in a small 20-pin QFN (Quad Flat No-leads) package, suitable for space-constrained designs.
Structure and Working Principle
The BQ24113RHLR operates as a synchronous step-down converter, efficiently regulating the input voltage to the required charging voltage for the battery. It uses a pulse-width modulation (PWM) control scheme to adjust the duty cycle of the internal MOSFETs, ensuring optimal power transfer with minimal losses. The IC includes a built-in voltage regulator, charge termination logic, and thermal regulation to protect the device and battery. Key components of the IC include the input voltage detector, current sensing circuitry, and charge state controller. The thermal regulation feature monitors the junction temperature and reduces the charging current if overheating is detected, preventing damage to the IC and battery. The device also supports pre-charge and fast-charge modes, adapting to the battery's state of charge for efficient and safe charging.
Key Features
The BQ24113RHLR offers several standout features that make it a preferred choice for portable electronics. Its high efficiency (up to 92%) minimizes power loss and heat generation, extending battery life and reducing thermal management requirements. The IC supports a wide input voltage range, accommodating various power sources such as USB ports and AC adapters. Additional features include programmable charge current (up to 2A), input current limiting, and automatic recharge. The device also provides status indicators (such as charging and fault conditions) through its output pins, enabling easy integration with system-level monitoring. Its compact QFN package and minimal external component count make it ideal for space-sensitive applications.
Application Areas
The BQ24113RHLR is widely used in portable electronic devices that require efficient and reliable battery charging. Common applications include smartphones, tablets, digital cameras, and wearable devices like smartwatches and fitness trackers. Its ability to handle a wide input voltage range makes it suitable for products powered by USB or external adapters. The IC is also used in medical portable devices, handheld scanners, and other battery-powered industrial equipment. Its integration of thermal regulation and charge termination logic ensures safe operation in diverse environments, making it a versatile solution for B2B applications requiring compact and efficient battery management.
Maintenance and Precautions
To ensure optimal performance and longevity of the BQ24113RHLR, proper thermal management is critical. Designers should provide adequate PCB copper area or heat sinks to dissipate heat, especially during high-current charging. The IC's thermal regulation feature helps mitigate overheating, but external measures further enhance reliability. Adherence to the manufacturer's recommended voltage and current limits is essential to prevent damage. Avoid exposing the IC to voltages beyond its specified range, and ensure proper grounding and decoupling to minimize noise and voltage spikes. Regularly inspect the charging circuit for signs of wear or damage, particularly in high-vibration environments.
B2B Procurement Guide
When procuring the BQ24113RHLR in bulk, verify the supplier's authenticity to avoid counterfeit components. Texas Instruments or authorized distributors are recommended sources. Pricing typically ranges from $1.50 to $3.00 per unit, depending on order volume and supplier terms. Consider lead times and minimum order quantities (MOQs) when planning procurement. For custom applications, consult the manufacturer's datasheet and application notes to ensure compatibility with your design. Testing samples before large-scale purchase is advisable to confirm performance in your specific use case.
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