Diodes Incorporated AP9211SA-AN-HAC-7

Overview

AP9211SA-AN-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (common-drain configuration) in a U-DFN2030-6 (Type C) package. It provides overcharge (4.375 V ±25 mV), overdischarge (2.500 V ±35 mV), discharge/charge overcurrent (±15 mV accuracy), and short-circuit (0.700 V ±100 mV) protection for 1-cell lithium-ion packs, with fixed 8.0 V overvoltage charger detection and auto-wake-up functionality enabled.

For engineers reviewing the AP9211SA-AN-HAC-7 datasheet, AP9211SA-AN-HAC-7 pinout, AP9211SA-AN-HAC-7 application, or AP9211SA-AN-HAC-7 equivalent, this device is selected for compact, low-quiescent-power battery management in portable medical devices, power tools, and Bluetooth headsets where 0V-charge capability and thermal-efficient DFN packaging are critical.

Technical Context

The AP9211SA-AN-HAC-7 implements independent voltage monitoring paths for VDD–VSS (cell voltage) and VM–VSS (current-sense differential), with dedicated comparators and precision delay timers (±20% at +25°C) for each protection event. Its logic circuitry controls two integrated MOSFETs via level-shifted gate drivers to enable/discharge control without external components.

It supports selectable 0V battery charging (enabled) and auto-wake-up mode (SA suffix), allowing recovery from overdischarge without external charger presence-unlike power-down variants. The built-in RVMD/RVMS internal resistors (300 kΩ typ. between VM–VDD/VSS) eliminate external bias networks while enabling accurate current sensing across temperature.

Key Specifications

Pinout & Package

U-DFN2030-6 (Type C) package with exposed thermal pad (EP) serving as common drain node for both integrated N-channel MOSFETs; requires PCB copper pour for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAL-M6T1U and RP505K001B-TR-F, the AP9211SA-AN-HAC-7 delivers superior system-level integration (eliminating 4–6 passives), autonomous overdischarge recovery, and tighter voltage accuracy-reducing design validation effort and field failure risk in consumer and medical battery packs.

Availability

AP9211SA-AN-HAC-7 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headset modules, and portable medical monitors requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AP9211SA-AN-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, high-safety 1-cell Li+ applications demanding integrated MOSFETs, ultra-low IQ, and factory-configurable protection thresholds.

FAQ

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

The VM pin serves as the current-sense input terminal, measuring the voltage difference between itself and VSS to detect charge/discharge current magnitude. It connects internally to RVMD (pull-up to VDD) and RVMS (pull-down to VSS), enabling automatic mode switching during overdischarge and short-circuit events without external resistors. Its typical bias resistance values are 300 kΩ (RVMD) and 30 kΩ (RVMS) at +25°C.

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

Yes-the AP9211SA-AN-HAC-7 has factory-enabled 0V battery charge permission. When the battery voltage is 0 V, the IC allows charging current to flow once the charger applies sufficient voltage to raise the cell above 1.2 V (V0CHA), bypassing the normal overdischarge lockout. This feature is implemented via internal logic that overrides the VDL comparator during initial charge ramp-up.

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

Auto-wake-up mode (SA suffix) keeps the IC active during overdischarge, allowing autonomous recovery when the battery voltage rises above VDU and remains there for tDLR. Power-down mode (standard AP9211S) forces the IC into ultra-low-current sleep (≤0.1 µA), requiring external charger connection to reset. The SA variant eliminates charger dependency for recovery in unattended devices like wearables and sensors.

What thermal considerations apply to the EP pad on the U-DFN2030-6 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 for effective heat dissipation. Without adequate copper area, junction temperature can exceed +150°C under 7.1 A continuous current at +70°C ambient, risking premature thermal shutdown or parametric drift in voltage detection accuracy.