Diodes Incorporated AP9211S-AB-HAC-7

Overview

AP9211S-AB-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual n-channel MOSFETs (common drain) and precision voltage/current monitoring circuitry for 1-cell rechargeable battery packs. It provides overcharge (4.425 V ±25 mV), overdischarge (2.500 V ±35 mV), discharge overcurrent (0.150 V ±15 mV), short-circuit (0.700 V ±100 mV), and charge overcurrent (−0.150 V ±15 mV) protection with fixed delay timing, enabling compact, component-minimized battery management in portable power tools and Bluetooth headsets.

For engineers reviewing the AP9211S-AB-HAC-7 datasheet, AP9211S-AB-HAC-7 pinout, AP9211S-AB-HAC-7 application, or AP9211S-AB-HAC-7 equivalent, key selection criteria include its U-DFN2030-6 (Type C) package thermal performance, 0.1 µA power-down current, selectable 0V battery charging, auto-release overdischarge behavior, and integrated MOSFET R_SS(ON) of 27 mΩ (typ) at V_DD = 4.0 V.

Technical Context

The AP9211S-AB-HAC-7 implements independent analog comparators for V_DD–V_VSS (cell voltage) and V_VM–V_VSS (current-sense voltage), each feeding into configurable logic with fixed delay timers (e.g., t_CU = 1.0 s typ, ±20% accuracy). Its dual-MOSFET architecture uses S1/S2 as source terminals and EP as common drain, enabling bidirectional current control without external switches.

Protection states are latched and released based on hysteresis thresholds: overcharge release at 4.225 V (200 mV hysteresis), overdischarge release at 2.900 V (400 mV hysteresis), and short-circuit detection with sub-microsecond response (t_SHORT = 200 ns typ). The VM pin supports both charge/discharge current sensing and charger presence detection via internal pull-up/pull-down resistors (RVMD = 300 kΩ typ, RVMS = 30 kΩ typ).

Key Specifications

Pinout & Package

AP9211S-AB-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 R5640T252C-TR and BQ29700DRVR, the AP9211S-AB-HAC-7 uniquely combines integrated MOSFETs, factory-set 0V charging, and selectable power-down mode in a 2.0 × 3.0 mm package-reducing total protection solution size by ≥35% and eliminating three external components versus discrete alternatives.

Availability

AP9211S-AB-HAC-7 is available at Aetrix Electronics and suitable for power tools, wireless headsets, and medical wearables requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for AP9211S-AB-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 connectivity applications.

The AP9211 belongs to Diodes' battery protection IC product line, engineered specifically for space-constrained, cost-sensitive 1-cell Li+ applications where integration, precision, and ultra-low standby power are critical.

FAQ

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

The VM pin serves as the bidirectional current-sense input: it monitors voltage drop across an external sense resistor (R2) to detect both charge and discharge current direction and magnitude. Internally, it connects to programmable pull-up (RVMD) and pull-down (RVMS) resistors that enable charger presence detection and automatic state transitions during overdischarge recovery.

Can AP9211S-AB-HAC-7 support battery packs with capacity above 3000 mAh?

Yes - the AP9211S-AB-HAC-7 supports any 1-cell Li+ pack regardless of capacity, as its protection thresholds depend only on voltage and current-sense voltage, not Ah rating. Its 9.0 A continuous drain rating (at +25°C) and 27 mΩ R_SS(ON) make it suitable for packs up to ~5000 mAh when paired with appropriate external FETs or used within thermal limits of the U-DFN2030-6 package.

How does the power-down mode differ from auto-wake-up mode in this part?

In power-down mode (enabled by default in AP9211S-AB-HAC-7), the IC enters ultra-low-current sleep (<0.1 µA) during overdischarge and remains latched until a charger is connected. In contrast, auto-wake-up mode keeps the IC active in overdischarge, allowing recovery when battery voltage rises above V_DU (2.900 V) without external stimulus - a key distinction confirmed in the ordering code ('S' = power-down, 'SA' = auto-wake).

Is the U-DFN2030-6 (Type C) package lead-free and RoHS compliant?

Yes - AP9211S-AB-HAC-7 is fully RoHS 3 compliant (2015/863/EU), halogen- and antimony-free, and totally lead-free per Diodes Incorporated's definitions. The package meets EU Directive 2002/95/EC and 2011/65/EU, with bromine and chlorine content <900 ppm each and antimony <1000 ppm, verified per material declarations and test reports.