AP9101CAK-BQTRG1

Overview

The AP9101CAK-BQTRG1 is a battery protection IC designed for single-cell lithium-ion or lithium-polymer rechargeable batteries. Manufactured by Diodes Incorporated, it integrates high-precision voltage detection circuits to monitor overcharge and overdischarge conditions. The device controls external MOSFET switches to isolate the battery during fault events, ensuring cell safety. It operates within a supply voltage range of 1.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The component is housed in a compact SOT-25-5 surface-mount package, facilitating efficient PCB layout for portable electronic applications requiring reliable power management.

Feature Summary

• Provides comprehensive protection against overcharge, overdischarge, overcharge current, and overdischarge current abnormalities by controlling external MOSFETs.
• Features a built-in fixed time circuit that eliminates the need for external capacitors, reducing the total count of required external components.
• Delivers high-accuracy voltage detection with configurable thresholds for both overcharge and overdischarge states to ensure precise battery monitoring.

Applications

• Single-cell lithium-ion battery pack protection
• Lithium-polymer battery management systems
• Portable consumer electronics power regulation

Procurement Notes

Verify the specific suffix codes (AK, BQ) against the manufacturer's official datasheet to confirm exact electrical parameters and pin configurations. Ensure compatibility with the target PCB footprint, specifically the SOT-25-5 package dimensions. Confirm RoHS compliance status and check for any recent product change notifications or obsolescence notices directly from Diodes Incorporated before finalizing procurement plans.

Selection Notes

Select this component when designing circuits for single-cell Li-ion or Li-Po batteries requiring integrated protection without complex external timing networks. The low quiescent current and high detection accuracy make it suitable for space-constrained portable devices. Ensure the external MOSFETs selected can handle the expected load currents and voltage ratings specified in the application notes.

Part Context

This part belongs to the AP9101C series of battery management ICs from Diodes Incorporated. The series is engineered specifically for protecting rechargeable lithium-based cells in portable applications. The AP9101C family offers a simplified solution by integrating detection logic and timing functions into a small footprint, reducing design complexity compared to discrete protection solutions.

FAQ

Does the AP9101CAK-BQTRG1 require external capacitors for its timing functions?

No, the device includes a built-in fixed time circuit, which removes the necessity for external capacitors typically used in protection timing loops.

What types of battery faults does this IC protect against?

It protects against overcharge voltage, overdischarge voltage, overcharge current, and overdischarge current abnormalities.