AP9101CAK-BMTRG1

Overview

The AP9101CAK-BMTRG1 is a single-chip protection IC designed for 1-cell lithium-ion or lithium-polymer rechargeable battery packs. Manufactured by Diodes Incorporated, it integrates high-precision voltage detection circuits to monitor overcharge, overdischarge, and current abnormalities. The device controls external MOSFET switches to isolate the battery during fault conditions. It operates within a supply voltage range of 1.5 V to 5.5 V and supports output voltages from 2.4 V to 4.5 V. Packaged in an SOT-25-5 surface-mount format, it functions reliably across temperatures from -40°C to +85°C with low quiescent current consumption.

Feature Summary

• Provides comprehensive protection against overcharge, overdischarge, overcharge current, and overdischarge current conditions.
• Integrates a fixed time circuit that eliminates the need for external capacitors, simplifying the design.
• Features high-accuracy voltage detection with tight tolerances for precise battery management.
• Operates with minimal power consumption in both active and power-down modes.

Applications

• Protection circuits for single-cell lithium-ion battery packs
• Safety management for lithium-polymer rechargeable batteries
• Battery management systems in portable electronic devices

Procurement Notes

Verify the specific suffix BMTRG1 against the official Diodes Incorporated datasheet to confirm exact detection thresholds and package variants. Confirm availability status as some AP9101C variants may be subject to production changes or end-of-life notices. Ensure compatibility with the intended external MOSFET switching requirements and operating temperature range before finalizing procurement.

Selection Notes

Select this component when designing protection for single-cell Li-ion or Li-Po batteries requiring integrated fault detection without external timing components. Consider the SOT-25-5 package size for space-constrained applications. Verify that the required overcharge and overdischarge detection voltages align with the specific options available within the AP9101C series.

Part Context

The AP9101CAK-BMTRG1 belongs to the AP9101C family of battery management ICs from Diodes Incorporated. This series focuses on providing robust protection for 1-cell lithium-based battery packs using a highly integrated solution. The family is characterized by its ability to detect multiple fault types while maintaining low current consumption, making it suitable for energy-efficient portable electronics.

Replacement Considerations

Other AP9101C variants such as AP9101CAK-AITRG1 or AP9101CK6-CGTRG1 may serve as functional substitutes if detection parameters match. Verify package compatibility (SOT-25 vs SOT-26) and ensure the replacement part number corresponds to the required voltage thresholds and operational specifications.

FAQ

Does the AP9101CAK-BMTRG1 require external capacitors for its timing functions?

No, the AP9101C series includes a built-in fixed time circuit, which removes the necessity for external capacitors in the protection circuitry.

What types of faults does this IC protect against?

It protects against overcharge voltage, overdischarge voltage, overcharge current, and overdischarge current by turning off the external MOSFET switch.