Diodes Incorporated AP9211SA-AA-HAC-7

Overview

AP9211SA-AA-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (common-drain configuration), overcharge/overdischarge voltage detection (4.375 V / 2.500 V), discharge overcurrent sensing (0.150 V), and short-circuit protection (0.700 V) - designed for 1-cell lithium-ion battery packs in portable power tools, Bluetooth headsets, and medical wearables.

For engineers reviewing the AP9211SA-AA-HAC-7 datasheet, AP9211SA-AA-HAC-7 pinout, AP9211SA-AA-HAC-7 application, or AP9211SA-AA-HAC-7 equivalent, key selection criteria include its U-DFN2030-6 (Type C) package, 0.1 µA power-down current, selectable 0V charge function, and fixed overvoltage charger detection at 8.0 V.

Technical Context

The AP9211SA-AA-HAC-7 implements independent analog comparators for overcharge (VCU = 4.375 V ±25 mV), overdischarge (VDL = 2.500 V ±35 mV), and discharge overcurrent (VDOC = 0.150 V ±15 mV), each with programmable delay timers (e.g., tCU = typical 1.0 s, ±20% accuracy). Its logic circuit controls two integrated MOSFETs via dedicated gate drivers without external components.

It features dual internal resistive networks (RVMD = 150–500 kΩ, RVMS = 10–50 kΩ) to enable auto-wake-up during overdischarge by pulling VM high or low, and includes an overvoltage charger detector (VOVCHG = 8.0 V, no delay) that directly disables the charge FET when VDD–VM exceeds threshold.

Key Specifications

Pinout & Package

AP9211SA-AA-HAC-7 uses the U-DFN2030-6 (Type C) thermally enhanced package with exposed thermal pad (EP) tied 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 single-cell Li+ battery protection applications.

Compared with R5640T252A-TR and BD8620GUL, AP9211SA-AA-HAC-7 uniquely combines integrated MOSFETs, auto-wake-up, and factory-configurable 0V charge in a 2.0×3.0 mm package - delivering the highest integration density and lowest system-level component count for consumer-grade 1-cell packs.

Availability

AP9211SA-AA-HAC-7 is available at Aetrix Electronics and suitable for portable power tools, wireless audio accessories, and medical wearables requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for AP9211SA-AA-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 integrated circuits, specializing in high-reliability power management, signal integrity, and protection solutions.

The AP9211 belongs to Diodes' Battery Protection IC product line, engineered specifically for cost-sensitive, space-constrained 1-cell Li+ applications where integration, low power, and safety certification readiness are critical.

FAQ

What is the function of the VM pin on AP9211SA-AA-HAC-7?

The VM pin serves as the current-sense and charger-status input. It monitors the voltage drop across the external sense resistor (R2) between P− and VM to detect discharge overcurrent, charge overcurrent, and short-circuit conditions. During overdischarge, it also enables auto-wake-up via internal pull-down (RVMS) to monitor battery recovery.

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

Yes - the "AA" suffix indicates factory-programmed permission for 0V battery charging. When enabled, the device allows external chargers to initiate charging even if the cell voltage has dropped to 0 V due to self-discharge, provided the battery remains within safe temperature and impedance limits defined by the charger.

How does the overvoltage charger detection feature operate?

The overvoltage charger detector continuously monitors the voltage difference between VDD and VM. If this exceeds 8.0 V (±2 V), the charge MOSFET is immediately turned off - with no delay - to protect against incompatible or malfunctioning chargers. Release occurs when VDD–VM falls below 7.3 V (±2 V).

What thermal design considerations apply to the EP pad?

The EP pad is the common drain node of both integrated MOSFETs and must be soldered to a minimum 25 mm² copper area on the PCB's inner or outer layer. Thermal vias (≥4×0.3 mm) should connect EP to internal ground planes to maintain junction temperature ≤125°C at 5 A continuous load in still air.