Diodes Incorporated AP9211S-AA-HAC-7

Overview

AP9211S-AA-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 delivers overcharge (4.375 V ±25 mV), overdischarge (2.500 V ±35 mV), discharge/charge overcurrent (±15 mV accuracy), and short-circuit protection for 1-cell lithium-ion packs, with fixed delay timing and 0V charge permission enabled.

For engineers reviewing the AP9211S-AA-HAC-7 datasheet, AP9211S-AA-HAC-7 pinout, AP9211S-AA-HAC-7 application, or AP9211S-AA-HAC-7 equivalent, this device supports critical safety-critical decisions in portable power systems where precision voltage thresholds, ultra-low quiescent current (3.0 µA typ.), and integrated MOSFET R_SS(ON) (27 mΩ typ.) directly impact pack reliability and runtime.

Technical Context

The AP9211S-AA-HAC-7 implements independent analog comparators for VDD–VSS (cell voltage) and VM–VSS (current-sense differential) monitoring, with dedicated logic paths for charge/discharge FET control. Its internal delay timers (e.g., t_CU = 1.0 s typ., ±20% accuracy) are fixed and unprogrammable, eliminating external RC components.

Protection sequencing is state-driven: overcharge disables only the charge FET (S2), while overdischarge disables only the discharge FET (S1); short-circuit detection uses a fast μs-scale timer (t_SHORT = 10 μs typ.). The VM pin serves dual roles-current sensing and charger status detection-via configurable internal pull-up (RVMD) and pull-down (RVMS) resistors.

Key Specifications

Pinout & Package

AP9211S-AA-HAC-7 is housed in a 2.0 mm × 3.0 mm × 0.55 mm U-DFN2030-6 (Type C) package with exposed thermal pad (EP). The EP is electrically connected to the common drain of both integrated N-channel MOSFETs and must be soldered to a large PCB copper area for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5460N255AA-TR and BD8630GUL, the AP9211S-AA-HAC-7 uniquely combines integrated MOSFETs, 0V charge permission, overvoltage charger detection, and factory-configured 2.500 V overdischarge - making it optimal for space-constrained, safety-critical, and maintenance-free Li+ packs.

Availability

AP9211S-AA-HAC-7 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headphone charging cases, medical wearable monitors, and Bluetooth asset trackers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/Green compliance.

Supply support for AP9211S-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 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 cost-sensitive, space-constrained 1-cell Li+ applications where integration, accuracy, and ultra-low power consumption are mandatory.

FAQ

What is the maximum continuous discharge current supported by AP9211S-AA-HAC-7?

The device supports 9.0 A continuous discharge at +25°C (derated to 7.1 A at +70°C), based on its integrated MOSFETs' R_SS(ON) of 27 mΩ typ. and 1000 mW power dissipation limit. This assumes proper PCB thermal design with the EP pad connected to ≥1 cm² copper area and ≥4 thermal vias.

Does AP9211S-AA-HAC-7 require external passive components for basic operation?

Yes - two external resistors are mandatory: R1 (330–470 Ω) between VDD and battery+, and R2 (2.7 kΩ typical) between P− and VM. These provide current limiting, ESD protection, and VM sense biasing. A 100 nF decoupling capacitor (C1) on VDD is also recommended per the datasheet.

How does the 0V battery charge function operate in practice?

When enabled (as in AP9211S-AA-HAC-7), the IC permits charging current to flow into a 0 V battery by internally enabling the charge FET despite zero cell voltage. This occurs only after the charger applies voltage to VDD and VM, and the internal logic confirms safe conditions - no external wake-up signal is needed.

Can AP9211S-AA-HAC-7 be used in automotive applications?

No - the AP9211S-AA-HAC-7 is not AEC-Q200 qualified and is specified for −40°C to +85°C ambient operation, which falls short of automotive-grade temperature and qualification requirements. Diodes offers AEC-Q100-qualified alternatives (e.g., AP9221 series) for under-hood or infotainment use.