Diodes Incorporated AP9101CK-ANTRG1

Overview

AP9101CK-ANTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.225V ±25mV, overdischarge detection at 3.200V ±35mV, discharge overcurrent detection at 0.060V ±15mV, short-circuit detection at 0.450V ±100mV, and built-in fixed delay timing-enabling full protection with minimal external components in portable power tools and medical handheld devices.

For engineers reviewing the AP9101CK-ANTRG1 datasheet, AP9101CK-ANTRG1 pinout, AP9101CK-ANTRG1 application, or AP9101CK-ANTRG1 equivalent, this device delivers precision voltage thresholds, selectable 0V charge and power-down modes, high-voltage VM–VDD tolerance (up to 30V), and SOT25 packaging optimized for space-constrained battery management systems.

Technical Context

The AP9101CK-ANTRG1 integrates independent voltage comparators for VDD–VSS (overcharge/overdischarge) and VM–VSS (discharge/charge overcurrent, short circuit), each with configurable thresholds and ±20% delay accuracy. Its logic circuit enforces auto-release overcharge protection and supports both power-down and auto-wake-up operation modes via factory configuration.

It uses internal high-voltage CMOS process technology enabling 30V differential rating between VDD and VM pins, while RVMD (300kΩ typ) and RVMS (30kΩ typ) resistors provide controlled pull-up/pull-down paths during fault states-eliminating need for external timing capacitors and reducing BOM count in compact Li+ pack designs.

Key Specifications

Pinout & Package

SOT25 package: 5-pin, small-outline transistor outline with gull-wing leads; moisture sensitivity level (MSL) 1, RoHS-compliant, halogen-free "Green" construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP9101CK-AETRG1 and AP9101CK-AHTRG1, the AP9101CK-ANTRG1 provides the highest overdischarge detection voltage (3.200V) and lowest discharge overcurrent threshold (0.060V), making it optimal for high-safety, low-threshold applications such as medical wearables and precision instrumentation where early fault intervention is critical.

Availability

AP9101CK-ANTRG1 is available at Aetrix Electronics and suitable for power tools, medical handheld devices, wearable fitness trackers, and smart home sensors requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP9101CK-ANTRG1 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP9101C product line delivers integrated battery protection for 1-cell Li+ systems, designed specifically to reduce external component count, improve voltage accuracy, and support factory-programmable safety parameters in space-constrained portable electronics.

FAQ

What is the function of the VM pin on the AP9101CK-ANTRG1?

The VM pin serves as the current-sense input for detecting discharge overcurrent, charge overcurrent, and short-circuit conditions. It measures voltage drop across an external sense resistor between the battery's P− terminal and load ground. During fault states, internal resistors (RVMD/RVMS) connect VM to VDD or VSS to stabilize sensing and enable automatic recovery-no external biasing required.

Does the AP9101CK-ANTRG1 support 0V battery charging?

Yes-the AP9101CK-ANTRG1 includes factory-enabled 0V battery charge functionality. When activated, it permits the charger to initiate charging even if the cell voltage has dropped to 0V due to self-discharge, using a dedicated wake-up path that bypasses normal under-voltage lockout. This feature is confirmed in the ordering table and functional description sections of DS37771 Rev. 8-3.

How does the overvoltage charger detection work on this IC?

The overvoltage charger detection monitors the voltage difference between VDD and VM pins. If this exceeds 8.0V (±2V), the CO pin is driven low immediately-without delay-to disable the charge MOSFET. Recovery occurs when the VDD–VM voltage falls below 7.3V (±2V). This protects against incompatible or malfunctioning chargers and operates independently of other protection functions.

What is the difference between power-down mode and auto-wake-up mode in this device?

Power-down mode reduces current consumption to 0.1µA typ but requires charger connection to exit overdischarge state. Auto-wake-up mode maintains ~3µA operation in overdischarge and recovers automatically when battery voltage rises above VDU (3.400V). The AP9101CK-ANTRG1 is configured for selectable power-down mode, meaning the function is present but can be disabled via external configuration or factory setting.