Diodes Incorporated AP9211SA-AE-HAC-7

Overview

AP9211SA-AE-HAC-7 from Diodes Incorporated is a single-chip 1-cell Li⁺ battery protection IC integrating dual N-channel MOSFETs (common-drain configuration), overcharge/overdischarge voltage detection (±25 mV accuracy at +25°C), discharge overcurrent sensing (0.05–0.32 V range, ±15 mV accuracy), and short-circuit protection (0.45–0.7 V, ±100 mV). It operates in 1.5–5.5 V supply range and delivers 9.0 A continuous drain current at +25°C for portable power tools and Bluetooth headsets.

For engineers reviewing the AP9211SA-AE-HAC-7 datasheet, AP9211SA-AE-HAC-7 pinout, AP9211SA-AE-HAC-7 application, or AP9211SA-AE-HAC-7 equivalent, this device supports precise battery safety control in space-constrained 1-cell packs where low quiescent current (3.0 µA typ. in normal mode), fixed delay timing, and 0V-charge enablement are critical selection criteria.

Technical Context

The AP9211SA-AE-HAC-7 implements dual independent protection paths: charge control via S2–EP MOSFET and discharge control via S1–EP MOSFET, both driven by internal logic with configurable hysteresis (0.1–0.4 V for overcharge, 0–0.7 V for overdischarge). Its VM pin monitors current-sense voltage across external R2 to trigger overcurrent (tDOC = 12 ms typ.) and short-circuit (tSHORT = 500 µs typ.) shutdowns.

It features factory-configured auto-wake-up mode (no charger required for overdischarge recovery), 0V battery charge permission, and overvoltage charger detection (8.0 V fixed, ±2 V accuracy) between VDD and VM - all implemented without external timing components due to built-in fixed-delay circuitry with ±20% accuracy at +25°C.

Key Specifications

Pinout & Package

AP9211SA-AE-HAC-7 uses the U-DFN2030-6 (Type C) thermally enhanced package with exposed thermal pad (EP), optimized for PCB heat dissipation in compact battery modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, the AP9211SA-AE-HAC-7 uniquely integrates dual N-MOSFETs, auto-wake-up, 0V charge, and overvoltage charger detection - delivering complete, self-contained protection in one U-DFN2030-6 package without external components.

Availability

AP9211SA-AE-HAC-7 is available at Aetrix Electronics and suitable for portable medical monitors, cordless power tools, TWS earbuds, and Bluetooth speakers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP9211SA-AE-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and products compliant with AEC-Q100/101 standards.

The AP9211 belongs to Diodes' battery protection IC product line, engineered specifically for space-constrained, high-reliability 1-cell Li⁺ applications where integration, accuracy, and ultra-low power are mandatory.

FAQ

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

The VM pin serves as the current-sense input for both charge and discharge paths. It measures the voltage drop across external resistor R2 to detect overcurrent (VCOC ≤ −0.095 V for charge, VDOC ≥ 0.095 V for discharge) and short-circuit (VSHORT ≥ 0.700 V) conditions. Internally, it also connects to pull-up (RVMD) and pull-down (RVMS) resistors that activate during overdischarge and overcurrent states to stabilize detection.

Does the AP9211SA-AE-HAC-7 support automatic recovery from overdischarge without a charger?

Yes - the "SA" suffix denotes auto-wake-up functionality. When the battery voltage recovers to ≥2.900 V (VDU) and remains there for ≥1.5 s (tDLR), the IC automatically exits overdischarge mode and re-enables the discharge MOSFET, even with no charger connected. This differs from the standard "S" version, which requires charger attachment to reset.

Can the AP9211SA-AE-HAC-7 protect against overvoltage from the charger?

Yes. The device monitors the voltage difference between VDD and VM pins. If this exceeds 8.0 V (±2 V), the charge MOSFET is immediately disabled - no delay - to prevent overvoltage damage to the Li⁺ cell. Recovery occurs when the differential falls below 7.3 V (±2 V), restoring charge capability without manual intervention.

What is the maximum continuous current the integrated MOSFETs can handle?

The 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 using the EP pad with ≥100 mm² copper area. The 27 mΩ typical R_SS(ON) ensures <220 mW conduction loss at 3 A, maintaining safe junction temperature under sustained load.