Diodes Incorporated AP9211S-AJ-HAC-7

Overview

AP9211S-AJ-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 (±25 mV accuracy at +25°C), discharge/charge overcurrent sensing (±15 mV accuracy), and short-circuit protection with 0.45–0.7 V detection threshold. It operates in 1-cell Li-ion packs for portable power tools, Bluetooth headsets, and medical wearables.

For engineers reviewing the AP9211S-AJ-HAC-7 datasheet, AP9211S-AJ-HAC-7 pinout, AP9211S-AJ-HAC-7 application, or AP9211S-AJ-HAC-7 equivalent, key selection criteria include its U-DFN2030-6 (Type C) package, 3.0 µA typical quiescent current in normal mode, fixed 8.0 V overvoltage charge detection, selectable 0V battery charging, and power-down mode activation.

Technical Context

The AP9211S-AJ-HAC-7 implements independent analog comparators for overcharge (VCU), overdischarge (VDL), discharge overcurrent (VDOC), charge overcurrent (VCOC), and short-circuit (VSHORT) events, each with programmable thresholds and ±20% delay timing accuracy. Its logic circuit controls two integrated N-MOSFETs via dedicated gate drivers to isolate P+ and P− terminals during fault conditions.

It features dual internal resistive networks-RVMD (150–500 kΩ) pulls VM to VDD during overdischarge, while RVMS (10–50 kΩ) pulls VM to VSS during discharge overcurrent-enabling automatic status recovery without external components. The device supports both power-down (0.1 µA max) and auto-wake-up operation modes, factory-configured per variant.

Key Specifications

Pinout & Package

AP9211S-AJ-HAC-7 is housed in a thermally enhanced U-DFN2030-6 (Type C) package with exposed thermal pad (EP), requiring PCB copper pour for effective heat dissipation. Pin 4 (NC) must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261A and RP506K, the AP9211S-AJ-HAC-7 delivers lower system-level power loss (via 27 mΩ N-MOSFETs), broader temperature coverage (−40°C to +85°C), and built-in charger overvoltage immunity-reducing validation effort for safety-critical portable designs.

Availability

AP9211S-AJ-HAC-7 is available at Aetrix Electronics and suitable for power tools, wireless audio devices, medical wearables, and smart home sensors requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AP9211S-AJ-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.

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 quiescent current are critical.

FAQ

What is the function of the VM pin in AP9211S-AJ-HAC-7?

The VM pin serves as the bidirectional current-sense input: it monitors voltage drop across external resistor R2 to detect charge/discharge direction and magnitude. During discharge overcurrent, RVMS connects VM to VSS; during overdischarge, RVMD pulls VM to VDD-enabling automatic status recovery without external circuitry.

Does AP9211S-AJ-HAC-7 support 0V battery charging, and how is it enabled?

Yes-AP9211S-AJ-HAC-7 has factory-configured 0V battery charge permission (per ordering code "AJ"). When battery voltage falls to 0 V, the IC permits charger current to flow once VDD rises above 1.2 V (V0CHA), enabling full recovery without manual intervention or external wake-up circuitry.

How does the overvoltage charger detection feature work, and what is its threshold?

The overvoltage charger detection monitors voltage between VDD and VM pins. At 8.0 V (±2 V) typ., it immediately disables the charging MOSFET to prevent damage from faulty chargers; release occurs at 7.3 V (±2 V) with no delay, ensuring rapid response to transient overvoltage events.

What is the thermal pad (EP) connection requirement for U-DFN2030-6 (Type C) package?

The EP pad must be soldered to a large PCB copper pour tied to the P+ net-not left floating or grounded. This provides primary thermal conduction path for the dual MOSFETs and ensures junction temperature remains below 150°C at 7.1 A continuous current (TA = +70°C).