Diodes Incorporated AP9211S-AE-HAC-7

Overview

AP9211S-AE-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 protection for 1-cell lithium-ion packs, with fixed delay timing and 0V charge enable.

For engineers reviewing the AP9211S-AE-HAC-7 datasheet, AP9211S-AE-HAC-7 pinout, AP9211S-AE-HAC-7 application, or AP9211S-AE-HAC-7 equivalent, key selection criteria include integrated MOSFET R_SS(ON) (27 mΩ typ.), ultra-low quiescent current (3.0 µA normal mode), power-down mode support, and factory-configured 0V battery charging permission - all critical for portable medical devices, power tools, and rechargeable consumer electronics.

Technical Context

The AP9211S-AE-HAC-7 implements independent voltage-sensing paths for VDD–VSS (cell voltage) and VM–VSS (current-sense differential), enabling simultaneous monitoring of charge/discharge states. Its logic circuitry uses internal level shifters to drive both MOSFET gates without external components, and features fixed detection delays (e.g., t_CU = 1.0 s typ.) with ±20% accuracy at +25°C.

Protection decisions are executed via hardware comparators with hysteresis (e.g., 0.200 V overcharge hysteresis), while the VM pin supports bidirectional current sensing through external resistor R2 (2.7 kΩ typical). The device includes an overvoltage charger detector (8.0 V fixed, ±2 V) that acts independently of cell voltage thresholds and triggers immediate charge FET shutdown.

Key Specifications

Pinout & Package

AP9211S-AE-HAC-7 is housed in a 6-pin U-DFN2030-6 (Type C) package with exposed thermal pad (EP), optimized for low-profile battery pack integration and thermal dissipation via PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5460N258AA-TR and BD8620GUL, the AP9211S-AE-HAC-7 delivers superior integration density, lower system-level power loss (27 mΩ vs. 45 mΩ), and unique safety features including 8.0 V charger overvoltage cutoff and factory-enabled 0V recovery - making it optimal for next-generation compact, high-reliability battery packs.

Availability

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

Supply support for AP9211S-AE-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 space-constrained, high-safety 1-cell Li+ applications where monolithic integration, ultra-low IQ, and robust fault coverage are mandatory.

FAQ

What is the function of the NC pin (Pin 4) on the AP9211S-AE-HAC-7?

Pin 4 is a no-connect terminal with no internal connection. It must remain unconnected and floating on the PCB - soldering it to ground, VDD, or any other net may cause undefined behavior or functional failure. This pin exists solely for mechanical symmetry in the U-DFN2030-6 package layout.

Does the AP9211S-AE-HAC-7 support automatic recovery from overdischarge without a charger?

No - the AP9211S-AE-HAC-7 variant includes power-down mode (not auto-wake-up), so recovery from overdischarge requires external charger connection to raise the battery voltage above V_DU (2.900 V). Unlike the AP9211SA series, it does not monitor VM for wake-up signals or sustain active monitoring in deep discharge.

How is the 0V battery charge function implemented, and can it be disabled?

The 0V charge function is factory-programmed into the AP9211S-AE-HAC-7 die and cannot be altered in-circuit. When enabled, it permits charging initiation even if the battery voltage reads 0 V, using internal biasing to activate the charge FET once sufficient charger voltage is applied. Disabling requires ordering the AP9211XX-XX-HAC-7 variant with different option coding.

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

The EP pad is electrically connected to the common drain of both MOSFETs and serves as the primary thermal path. It must be soldered to a minimum 10 mm² copper area on the PCB, preferably with ≥4 thermal vias (0.3 mm diameter) connecting to inner ground planes. Insufficient copper or missing vias will cause junction temperature to exceed 150°C under 7.1 A continuous load at +70°C ambient.