Diodes Incorporated AP9101CAK-AZTRG1

Overview

AP9101CAK-AZTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, integrating overcharge (4.375V), overdischarge (2.500V), discharge overcurrent (0.150V), charge overcurrent (-0.150V), short-circuit (0.700V), and overvoltage charger (8.0V) detection with ±25mV voltage accuracy and built-in fixed delay timing. It drives external N-channel MOSFETs via CO/DO pins and supports 0V battery charging and selectable power-down mode.

For engineers reviewing the AP9101CAK-AZTRG1 datasheet, AP9101CAK-AZTRG1 pinout, AP9101CAK-AZTRG1 application, or AP9101CAK-AZTRG1 equivalent, this device is selected for compact, low-power, high-accuracy battery safety in portable electronics where precise voltage thresholds, ultra-low quiescent current (3.0µA typ), and integrated delay circuits reduce BOM count and layout complexity.

Technical Context

The AP9101CAK-AZTRG1 implements dual-MOSFET control logic with independent CO (charge FET gate) and DO (discharge FET gate) outputs, using VM as a bidirectional current-sense input referenced to VSS. Its internal voltage comparators monitor VDD–VSS (cell voltage) and VM–VSS (sense resistor drop) with programmable hysteresis and temperature-compensated thresholds.

It features a fixed-time detection circuit eliminating external capacitors, auto-release overcharge protection, and an overvoltage charger detector (8.0V/7.3V) that operates without delay. The IC uses high-voltage CMOS process enabling 30V VDD–VM tolerance and supports factory-configured options including 0V charge enable and power-down mode selection.

Key Specifications

Pinout & Package

AP9101CAK-AZTRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 marked with dot; pinout validated per Diodes DS37771 Rev. 8–3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery protection applications.

Compared with R5460N255AA-TR and BD14001GUL, AP9101CAK-AZTRG1 uniquely combines 0V charge enable, overvoltage charger detection, and sub-µA power-down current in a 5-pin SOT25, making it optimal for space-constrained 1S consumer electronics requiring full-featured, self-contained protection.

Availability

AP9101CAK-AZTRG1 is available at Aetrix Electronics and suitable for smart wearables, Bluetooth audio devices, portable medical sensors, and wireless game controllers requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP9101CAK-AZTRG1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and protection applications.

The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for high-accuracy, low-power, single-cell Li+ safety in portable consumer electronics with minimal external component count.

FAQ

What is the function of the VM pin on AP9101CAK-AZTRG1?

The VM pin serves as a bidirectional current-sense input referenced to VSS. During discharge, it monitors voltage drop across the external sense resistor to detect overcurrent and short-circuit conditions. During charge, it measures reverse voltage for charge overcurrent detection. Its −0.3V to +5.5V rating enables robust operation under polarity reversal or transient events.

Does AP9101CAK-AZTRG1 support automatic recovery from overdischarge without a charger?

No - AP9101CAK-AZTRG1 uses the standard "power-down" mode (not auto-wake-up). Recovery from overdischarge requires external charger connection to raise battery voltage above VDU (2.900V) while VM is pulled low. This design ensures intentional reactivation and prevents uncontrolled discharge in damaged or mismatched battery systems.

How does the overvoltage charger detection feature operate independently of other protections?

The overvoltage charger detector monitors VDD–VM voltage continuously with dedicated comparators set to 8.0V (detection) and 7.3V (release). It triggers immediate CO pin low assertion without delay or hysteresis dependency on cell voltage, providing standalone protection against incompatible or malfunctioning chargers regardless of battery state.

Can AP9101CAK-AZTRG1 be used with lithium iron phosphate (LiFePO₄) cells?

No - its overcharge detection range (3.5–4.5V) and overdischarge range (2.0–3.4V) are calibrated for Li-ion/Li-polymer chemistry. LiFePO₄ requires ~3.65V overcharge and ~2.5V overdischarge thresholds; using AP9101CAK-AZTRG1 would result in premature cutoff or unsafe operation. Diodes offers AP9211 for LiFePO₄-specific protection.