Diodes Incorporated AP9211SA-AB-HAC-7

Overview

AP9211SA-AB-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual n-channel MOSFETs (common drain) in U-DFN2030-6 (Type C) package, designed for 1-cell rechargeable battery packs. It provides overcharge detection at 4.425 V ±25 mV, overdischarge detection at 2.500 V ±35 mV, and discharge overcurrent detection at 0.150 V ±15 mV, with fixed 8.0 V overvoltage charger protection and auto-release functionality.

For engineers reviewing the AP9211SA-AB-HAC-7 datasheet, AP9211SA-AB-HAC-7 pinout, AP9211SA-AB-HAC-7 application, or AP9211SA-AB-HAC-7 equivalent, this device supports critical safety-critical decisions in portable power systems where precise voltage thresholds, low quiescent current (3.0 µA typ), and integrated MOSFET R_SS(ON) ≤31 mΩ are required for reliable pack-level protection.

Technical Context

The AP9211SA-AB-HAC-7 implements dual independent protection paths: one for charge control (via S2/VM sensing) and one for discharge control (via S1/VM sensing), each with configurable delay timers and hysteresis. Its internal logic uses voltage-controlled comparators with ±25 mV accuracy on overcharge detection and ±35 mV on overdischarge detection to trigger MOSFET gate shutdown.

It features selectable power-down mode (enabled by default in -AB variant) and factory-configured 0V battery charge permission. The VM pin serves as bidirectional current-sense input, interfacing with external R2 resistor to detect charge/discharge polarity and magnitude, while RVMD/RVMS internal resistors enable automatic wake-up or pull-up/pull-down during fault states.

Key Specifications

Pinout & Package

AP9211SA-AB-HAC-7 is housed in a thermally enhanced U-DFN2030-6 (Type C) package with exposed thermal pad (EP) connected to common drain of both MOSFETs. PCB layout requires large copper area under EP for effective heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-cell Li+ battery protection applications.

Compared with S-8261AAB-M6T1U and RP507K001B-TR-F, the AP9211SA-AB-HAC-7 uniquely integrates dual MOSFETs, offers factory-set 0V charge permission, and includes dedicated 8.0 V charger overvoltage protection - eliminating external components and enhancing safety in compact, high-reliability battery packs.

Availability

AP9211SA-AB-HAC-7 is available at Aetrix Electronics and suitable for power tool battery packs, medical wearable sensors, and Bluetooth asset trackers requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for AP9211SA-AB-HAC-7 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 AP9211 belongs to Diodes' battery protection IC product line, engineered specifically for space-constrained, safety-critical 1-cell Li+ applications where integration, accuracy, and ultra-low power consumption are essential.

FAQ

What is the function of the VM pin in AP9211SA-AB-HAC-7?

The VM pin serves as the bidirectional current-sense input that detects both charge and discharge current direction and magnitude by measuring voltage drop across external resistor R2. During discharge, it connects to VSS via internal RVMS to pull VM low; during charge, it remains floating or references VDD via RVMD depending on fault state. This enables single-pin current monitoring without separate sense lines.

Does AP9211SA-AB-HAC-7 support automatic recovery from overdischarge without external intervention?

Yes - the "SA" suffix denotes auto-wake-up capability. When in overdischarge state, the device automatically exits protection mode once battery voltage rises above 2.900 V (VDU) and remains there for ≥tDLR (overdischarge release delay time), even without charger connection. This eliminates need for manual reset or external wake-up circuitry.

How does the AP9211SA-AB-HAC-7 handle overvoltage conditions on the charger input?

It monitors voltage between VDD and VM pins and triggers immediate charging MOSFET shutdown if it exceeds 8.0 V (±2 V). Release occurs at 7.3 V (±2 V) with no intentional delay, providing fast-response protection against faulty or mismatched chargers without requiring external TVS diodes or voltage dividers.

What is the maximum continuous current supported by the integrated MOSFETs?

The integrated dual n-channel MOSFETs support 9.0 A continuous drain current at +25°C (TA) with VGS = 4.5 V, derating to 7.1 A at +70°C. This rating assumes proper PCB thermal design with the EP pad connected to ≥1 cm² copper area, leveraging the specified R_SS(ON) ≤31 mΩ to maintain junction temperature below 150°C.