AP9101CAK-BFTRG1

Overview

The AP9101CAK-BFTRG1 is a single-chip protection IC designed for lithium-ion and lithium-polymer rechargeable battery packs. It integrates high-precision voltage detection circuits to monitor overcharge, overdischarge, overcharge current, and overdischarge conditions, automatically turning off external MOSFET switches during abnormalities. The device operates within a supply voltage range of 1.5 V to 5.5 V and supports output voltages from 2.5 V to 4.425 V. It features low power consumption with a typical operating current of 3 µA at +25°C and 0.01 µA in power-down mode. The component is housed in an SOT-25-5 package and functions reliably across temperatures from -40°C to +85°C.

Feature Summary

• Integrates high-precision voltage detection for comprehensive battery protection against abnormal conditions
• Includes built-in fixed time circuitry eliminating the need for external capacitors
• Operates with extremely low current consumption in both active and power-down modes

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 BFTRG1 against official Diodes Incorporated documentation to confirm exact detection voltage steps and hysteresis values. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Ensure the SOT-25-5 package availability matches your PCB layout requirements before finalizing procurement orders.

Selection Notes

Select this component when designing protection circuits for single-cell Li-ion or Li-Po batteries requiring minimal external components. The integrated timing circuit reduces bill of materials complexity. Verify that the required overcharge and overdischarge detection thresholds align with the available step configurations provided in the datasheet. Ensure the operating temperature range meets the environmental specifications of the target application.

Part Context

This part belongs to the AP9101C series of battery management ICs manufactured by Diodes Incorporated. The series focuses on providing complete protection solutions for single-cell lithium-based batteries. Variants within the series typically differ by package type, such as SOT-25 or SOT-26, and specific detection voltage parameters defined by their ordering suffixes.

Replacement Considerations

Check for other AP9101C variants with compatible packages like SOT-26 if pinout adjustments are permissible. Verify functional equivalence regarding detection accuracy and current consumption before substituting.