Diodes Incorporated AP9211S-DD-HAC-7

Overview

AP9211S-DD-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 detection (0.05–0.32 V range, ±15 mV accuracy), and short-circuit protection with 0.45–0.7 V threshold. It operates in portable power banks requiring compact, low-quiescent-current (3.0 µA typ.) battery safety control.

For engineers reviewing the AP9211S-DD-HAC-7 datasheet, AP9211S-DD-HAC-7 pinout, AP9211S-DD-HAC-7 application, or AP9211S-DD-HAC-7 equivalent, this device supports critical decisions on cell-level protection architecture, MOSFET on-resistance selection (27 mΩ typ. at VDD = 4.0 V), thermal pad layout for U-DFN2030-6 (Type C), and trade-offs between power-down mode (0.1 µA max) versus auto-wake-up functionality.

Technical Context

The AP9211S-DD-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 fixed delay timers (e.g., tCU = 1.0 s typ., ±20% accuracy). Its logic circuit uses internal level-shifting to drive dual MOSFET gates without external drivers.

It features two selectable operating modes: power-down (0.1 µA max ICC) activated during overdischarge, requiring charger connection to resume; or auto-wake-up (3.5–5.5 µA IAUTO), enabling recovery when battery voltage rises above VDU. The VM pin senses current via external R2 resistor (2.7 kΩ typical), while RVMD/RVMS internal resistors enable automatic pull-up/pull-down for status signaling.

Key Specifications

Pinout & Package

AP9211S-DD-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 during high-current discharge events.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5460K001C-TR and SE9011B, the AP9211S-DD-HAC-7 delivers integrated MOSFETs with 27 mΩ R_SS(ON), factory-set 4.375 V VCU with 0.2 V hysteresis, and 0V charge enable - making it optimal for space-constrained, field-recoverable 1-cell packs where BOM simplification and deep-discharge resilience are critical.

Availability

AP9211S-DD-HAC-7 is available at Aetrix Electronics and suitable for power banks, wireless headphones, Bluetooth speakers, and medical wearables requiring stable component supply, consistent parametric performance across temperature, and long-term lifecycle continuity.

Supply support for AP9211S-DD-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and protection applications.

The AP9211 belongs to Diodes' battery protection IC product line, engineered specifically for high-reliability, space-efficient 1-cell Li+ pack safety in consumer and portable medical electronics.

FAQ

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

The VM pin serves as the current-sense input that monitors voltage drop across an external resistor (R2, typically 2.7 kΩ) placed between P− and the battery negative terminal. It enables detection of charge/discharge direction and magnitude, triggering overcurrent or short-circuit shutdown when VM-to-VSS exceeds VDOC (0.150 V) or VSHORT (0.700 V). Internal RVMS/RVMD resistors provide automatic pull-down/pull-up for status signaling during fault conditions.

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

Yes, the AP9211S-DD-HAC-7 includes factory-configured 0V battery charge permission. When the battery voltage drops to 0 V due to self-discharge, the IC permits charging to resume once the charger applies voltage - verified by V0CHA = 1.2 V minimum starting threshold. This feature is permanently enabled in this variant and does not require external configuration or pin strapping.

How does the power-down mode operate, and what triggers exit from it?

In power-down mode (enabled in AP9211S variants), the IC enters ultra-low-current sleep (≤0.1 µA) during overdischarge. Exit occurs exclusively upon charger connection: the charger must raise battery voltage above VDL (2.500 V) while simultaneously pulling VM toward VSS via R2, allowing internal logic to reset the discharge MOSFET. No auto-wake behavior occurs without external charging voltage.

What thermal design considerations apply to the EP pad of the U-DFN2030-6 package?

The EP pad is electrically connected to both MOSFET drains and serves as the primary thermal path. It must be soldered to a ≥25 mm² copper pour on the PCB's inner or bottom layer, with ≥4 thermal vias (0.3 mm diameter) connecting to internal ground planes. This reduces junction-to-ambient thermal resistance to ≤60°C/W, preventing derating of the 9.0 A continuous drain rating above +25°C ambient.