Diodes Incorporated AP9101CAK-AKTRG1

Overview

AP9101CAK-AKTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.250V ±25mV, overdischarge detection at 2.400V ±35mV, discharge overcurrent detection at 0.150V ±15mV, and built-in fixed delay timing with no external capacitor required. It controls external N-channel MOSFETs via DO (discharge gate) and CO (charge gate) pins in portable power tools, Bluetooth headsets, and wearable medical monitors.

For engineers reviewing the AP9101CAK-AKTRG1 datasheet, AP9101CAK-AKTRG1 pinout, AP9101CAK-AKTRG1 application, or AP9101CAK-AKTRG1 equivalent, this device delivers precision voltage thresholds, selectable 0V-charge capability, auto-release overcharge protection mode, and ultra-low 3.0µA operating current - critical for long-life battery-powered systems requiring reliable cell-level safety compliance.

Technical Context

The AP9101CAK-AKTRG1 integrates independent high-accuracy comparators for VDD–VSS (cell voltage) and VM–VSS (current-sense voltage), with dedicated delay timers for overcharge (tCU), overdischarge (tDL), discharge overcurrent (tDOC), short-circuit (tSHORT), and charge overcurrent (tCOC). Its logic circuit enforces auto-release behavior: CO re-enables after VDD drops below 4.050V (VCL), and DO re-enables after VDD rises above 3.000V (VDU).

It supports dual operating modes: power-down (0.01µA standby) or auto-wake-up, factory-configured per variant; this AKTRG1 version includes 0V battery charge permission and uses a high-voltage CMOS process enabling 30V VDD-to-VM tolerance. RVMD (300kΩ typ) and RVMS (30kΩ typ) internal resistors enable VM pin biasing without external components during fault states.

Key Specifications

Pinout & Package

SOT25 package: 5-pin, small-outline transistor outline with gull-wing leads; pin 1 marked, 1.27mm pitch, RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5602T242AD-TR and BD1400GUL-E2, the AP9101CAK-AKTRG1 uniquely combines factory-set 0V charge permission, auto-release overcharge behavior, and integrated VM biasing - delivering plug-and-play safety for space-constrained 1S Li-ion designs without sacrificing precision or recovery flexibility.

Availability

AP9101CAK-AKTRG1 is available at Aetrix Electronics and suitable for portable power tools, wireless audio devices, portable medical monitors, and smart wearables requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/Green compliance.

Supply support for AP9101CAK-AKTRG1 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 solutions, with design centers across Asia, Europe, and the US and manufacturing certified to IATF 16949.

The AP9101C belongs to Diodes' battery protection IC product line, engineered specifically for cost-sensitive, high-volume 1-cell Li-ion/Li-polymer applications demanding precision, ultra-low power, and minimal external components.

FAQ

What is the function of the VM pin on the AP9101CAK-AKTRG1?

The VM pin serves as the current-sense input, measuring voltage drop across an external sense resistor between the battery's P− terminal and system ground. It directly feeds the discharge overcurrent, charge overcurrent, and short-circuit detection comparators. Internal RVMS (30kΩ typ) and RVMD (300kΩ typ) resistors provide automatic biasing during fault states - eliminating need for external pull-up/down networks.

Does the AP9101CAK-AKTRG1 require external capacitors for timing functions?

No. The AP9101CAK-AKTRG1 integrates factory-trimmed fixed-time delay circuits for all protection events (overcharge, overdischarge, overcurrent, short-circuit), removing dependency on external timing capacitors. This simplifies layout, improves temperature stability of delay times, and reduces total component count - confirmed in DS37771 Rev. 8 Section 7.2 and Typical Applications Circuit.

How does the 0V battery charge function operate in this variant?

This AKTRG1 variant has factory-enabled 0V battery charge permission (V0CHA = 1.2V threshold). When the battery voltage is 0V, the IC allows external charger current to flow through the CO-controlled MOSFET once VM detects sufficient charger voltage - enabling safe recovery without manual reset or external wake signal. This is distinct from variants with V0INH ≤0.45V, which block charging entirely at 0V.

What is the maximum allowable voltage difference between VDD and VM pins?

The absolute maximum rating between VDD and VM is 30V, per Diodes' DS37771 Rev. 8 Absolute Maximum Ratings table. This high tolerance accommodates transient surges during charger connection/disconnection and protects against accidental 12V/24V adapter misapplication - critical for field-repairable consumer devices where users may substitute chargers.