AP9101CAK-ASTRG1

Overview

The AP9101CAK-ASTRG1 is a single-chip protection IC designed for one-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. The component functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates high-accuracy voltage detection for overcharge and overdischarge protection without requiring external timing capacitors.
• Provides comprehensive fault protection against overcurrent and overvoltage conditions by controlling external MOSFETs.
• Features ultra-low power consumption in both operation and power-down modes to preserve battery life.

Applications

• Protection circuits for single-cell lithium-ion battery packs
• Safety management for lithium-polymer rechargeable batteries
• Portable electronic devices requiring integrated cell protection

Procurement Notes

Verify the specific suffix code ASTRG1 against official Diodes Incorporated documentation to confirm exact package type and tape/reel specifications. Ensure compatibility with existing PCB footprints, as SOT-25 and SOT-26 variants differ physically. Confirm RoHS compliance status through the manufacturer's latest environmental declaration before integration into regulated products.

Selection Notes

Select this component when designing compact single-cell battery protection systems that require minimal external components. The built-in fixed time circuit eliminates the need for external capacitors, reducing bill of materials and board space. Ensure the selected variant matches the required detection voltage steps and hysteresis accuracy specified in the datasheet for the target application safety margins.

Part Context

This part belongs to the AP9101C series of battery management ICs from Diodes Incorporated. The series focuses on providing complete protection solutions for 1-cell Li+ batteries using a highly integrated approach. Variants within the family share core functional architectures but may differ in package options such as SOT-25 or SOT-26 and specific electrical parameter tolerances defined by their ordering suffixes.

Replacement Considerations

Direct substitutes include other AP9101C series parts like AP9101CK6-CGTRG1 or AP9101CAK-AITRG1, provided pinouts and electrical characteristics match the design requirements. Verify package equivalence between SOT-25 and SOT-26 if swapping physical footprints. Cross-reference detection voltages and current limits to ensure functional parity.