AP9101CAK-BDTRG1

Overview

The AP9101CAK-BDTRG1 is a single-chip protection IC for lithium-ion and lithium-polymer rechargeable batteries. It safeguards battery packs by detecting overcharge voltage, overdischarge voltage, overcharge current, and overdischarge current, subsequently turning off external MOSFET switches to prevent damage. The device integrates a high-precision voltage detection circuit and a fixed-time delay circuit, eliminating the need for external capacitors. 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. The component is housed in an SOT-25-5 surface-mount package and functions reliably across temperatures from -40°C to +85°C.

Feature Summary

• Integrates high-precision voltage detection for overcharge and overdischarge protection
• Includes built-in fixed-time delay circuits to eliminate external capacitor requirements
• Controls external MOSFET switches to isolate the battery during fault conditions

Applications

• Single-cell lithium-ion battery pack protection
• Lithium-polymer rechargeable battery management systems
• Portable electronic devices requiring compact battery safety solutions

Procurement Notes

Verify the specific suffix BDTRG1 against the manufacturer's official datasheet to confirm pinout configuration and electrical tolerances. Ensure compatibility with the intended external MOSFET gate drive requirements. Confirm RoHS compliance status and lead-free manufacturing specifications prior to integration into production designs.

Selection Notes

Select this component for applications requiring minimal external component count due to its integrated timing circuits. Evaluate the SOT-25-5 package size constraints against available board space. Consider the low quiescent current consumption for battery-operated devices where standby power efficiency is critical. Verify that the detection voltage ranges align with the specific chemistry and capacity of the target battery cell.

Part Context

This part belongs to the AP9101C series of battery management ICs manufactured by Diodes Incorporated. The series is designed specifically for single-cell Li-ion and Li-Po battery protection. Variants within the family share core protection functionalities but may differ in packaging options such as SOT-26 or specific detection voltage thresholds defined by their ordering suffixes.

Replacement Considerations

Consult the official Diodes Incorporated documentation for confirmed substitute part numbers. Cross-reference pinouts and detection parameters carefully when considering alternative manufacturers.