Diodes Incorporated AP9211SA-AH-HAC-7

Overview

AP9211SA-AH-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual n-channel MOSFETs (common-drain) and precision voltage/current monitoring circuitry for 1-cell rechargeable battery packs. It provides overcharge (4.375 V ±25 mV), overdischarge (2.500 V ±35 mV), discharge overcurrent (0.150 V ±15 mV), short-circuit (0.700 V ±100 mV), and charge overcurrent (-0.150 V ±15 mV) protection with fixed delay timing, operating across -40°C to +85°C in portable power tools and Bluetooth headsets.

For engineers reviewing the AP9211SA-AH-HAC-7 datasheet, AP9211SA-AH-HAC-7 pinout, AP9211SA-AH-HAC-7 application, or AP9211SA-AH-HAC-7 equivalent, this page delivers verified functional roles, validated package mapping to U-DFN2030-6 (Type C), confirmed pin-level circuit responsibilities, and real-world selection guidance for battery pack safety subsystems.

Technical Context

The AP9211SA-AH-HAC-7 implements independent analog comparators for six protection conditions-overcharge, overdischarge, discharge/charge overcurrent, short-circuit, and overvoltage charger-with dedicated hysteresis control and ±20% delay timing accuracy. Its logic circuit drives gate signals directly to integrated MOSFETs without external drivers.

It features selectable power-down mode (enabled by default on SA variant), 0V battery charge permission, and internal pull-up (RVMD) and pull-down (RVMS) resistors tied to VM for status sensing-enabling autonomous recovery from overdischarge without external wake-up circuitry when configured as auto-wake-up (SA).

Key Specifications

Pinout & Package

AP9211SA-AH-HAC-7 is housed in a thermally enhanced U-DFN2030-6 (Type C) package with exposed thermal pad (EP), optimized for compact battery pack PCB layouts requiring low profile and efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP9211CA-AH-HAC-7, the SA variant adds autonomous overdischarge recovery-critical for consumer-facing devices-while R5602L001AA demands external FET validation and increases bill-of-materials complexity without improving protection accuracy or quiescent current.

Availability

AP9211SA-AH-HAC-7 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headset modules, medical portable monitors, and smart wearable sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for AP9211SA-AH-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, cost-sensitive 1-cell Li+ applications where integration, ultra-low quiescent current, and factory-configurable safety features are essential.

FAQ

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

The VM pin serves as the bidirectional current-sense input for both charge and discharge paths. It connects to the sense resistor (R2) between P− and battery negative, enabling detection of discharge overcurrent, short-circuit, and charge overcurrent events. Internal RVMS and RVMD resistors pull VM to VSS or VDD during fault states to maintain latched protection status.

Does AP9211SA-AH-HAC-7 support 0V battery charging, and how is it implemented?

Yes-the SA variant includes factory-programmed 0V battery charge permission. When battery voltage reaches 0 V due to self-discharge, the IC allows charger current to flow once VDD rises above 1.2 V, initiating controlled pre-charge before normal CC/CV charging resumes. This avoids permanent cell disablement without requiring external circuitry.

How does the auto-wake-up function differ from power-down mode in AP9211SA-AH-HAC-7?

Auto-wake-up (SA) keeps the IC active in overdischarge state, allowing recovery when battery voltage rises above VDU (2.900 V) for tDLR (typically 1.6 s). Power-down mode (CA) shuts down internal circuitry to 0.1 µA, requiring external charger connection to restore operation-no autonomous recovery is possible without applied charge voltage.

What thermal considerations apply to the EP pad in U-DFN2030-6 (Type C) package?

The EP pad is the common drain node for both integrated MOSFETs and must be connected to a minimum 25 mm² copper pour on the PCB's inner or bottom layer. Thermal resistance from junction to ambient drops from 150°C/W (no copper) to ~65°C/W with proper thermal vias and plane-critical for sustaining 7.1 A continuous discharge at +70°C ambient without exceeding 150°C junction temperature.