Diodes Incorporated AP9214LA-AD-HSB-7

Overview

AP9214LA-AD-HSB-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (RSS(ON) = 13 mΩ typ, ID = 9.0 A) and precision voltage/current detection circuitry for 1-cell rechargeable battery packs. It provides overcharge (VCU = 4.25 V ±25 mV), overdischarge (VDL = 2.50 V ±35 mV), discharge/charge overcurrent (VDOC = 0.15 V ±15 mV; VCOC = −0.10 V ±15 mV), short-circuit (VSHORT = 0.60 V ±100 mV), and overvoltage charger (VOVCHG = 8.0 V ±2 V) protection with fixed delay timing. Used in portable power tools and medical handheld devices requiring compact, low-quiescent-power battery safety.

For engineers reviewing the AP9214LA-AD-HSB-7 datasheet, AP9214LA-AD-HSB-7 pinout, AP9214LA-AD-HSB-7 application, or AP9214LA-AD-HSB-7 equivalent, key selection criteria include its U-DFN2535-6 (Type B, Option 1) package, 3.0 µA typical normal-mode current, selectable power-down mode, 0V charge enable, and auto-release overcharge behavior - all critical for space-constrained, long-life battery systems.

Technical Context

The AP9214LA-AD-HSB-7 implements a dual-MOSFET protection architecture with common-drain EP pad, where S1 controls discharge path and S2 controls charge path. Its internal logic uses high-accuracy comparators (±25 mV overcharge detection tolerance) and fixed-delay timers (tCU = 1.0 s typ, tSHORT = 10 µs typ) to trigger MOSFET gate control without external components.

It supports two operational modes: power-down (0.1 µA max standby current, wake-up only via charger) and auto-wake-up (active monitoring during overdischarge). The VM pin senses bidirectional current through R2 (2.7 kΩ typical), enabling independent detection of charge overcurrent (negative VM–VSS voltage) and discharge overcurrent/short (positive VM–VSS voltage).

Key Specifications

Pinout & Package

AP9214LA-AD-HSB-7 is housed in a 2.5 mm × 3.5 mm U-DFN2535-6 (Type B, Option 1) package with exposed thermal pad (EP) for enhanced heat dissipation. Pin 5 is NC (no connection); EP must be soldered to large PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAL-M6T1U and RP507K001B-TR-F, the AP9214LA-AD-HSB-7 delivers higher integration (dual MOSFETs + protection logic), faster short-circuit response (10 µs vs. 100 µs), and guaranteed 0V charge functionality - making it optimal for compact, self-recovering battery systems where board space and field reliability are prioritized over minimal BOM cost.

Availability

AP9214LA-AD-HSB-7 is available at Aetrix Electronics and suitable for power tools, medical handheld devices, wireless headphones, and smart wearables requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.

Supply support for AP9214LA-AD-HSB-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 company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and protection applications.

The AP9214L series targets compact, high-reliability Li+ battery protection in consumer and industrial portable equipment, emphasizing integration, low IQ, and factory-configurable safety features without external passive components.

FAQ

What is the function of the VM pin in AP9214LA-AD-HSB-7?

The VM pin serves as the bidirectional current-sense input. When referenced to VSS, a positive voltage indicates discharge current (enabling overcurrent/short detection), while a negative voltage indicates charge current (enabling charge overcurrent detection). It interfaces with an external sense resistor (R2 = 2.7 kΩ typical) and connects internally to RVMS/RVMD pull-down/pull-up networks during fault conditions to stabilize sensing.

Does AP9214LA-AD-HSB-7 support both power-down and auto-wake-up modes?

Yes - AP9214LA-AD-HSB-7 is the auto-wake-up variant (denoted by "A" in the part number). It remains active during overdischarge and recovers to normal operation when battery voltage rises above VDU or after tDLR delay, eliminating need for external charger connection to exit protection state - unlike the power-down version (AP9214L-AD-HSB-7) which requires charger presence.

How does the 0V battery charge function operate?

The 0V charge function is factory-configured into AP9214LA-AD-HSB-7. When battery voltage is 0 V, the IC permits charging to begin once VDD reaches ≥1.2 V (V0CHA), allowing recovery of deeply self-discharged cells. This avoids permanent disablement and eliminates manual reset requirements in end-user devices like wearables or remote controls.

What is the thermal design requirement for the EP pad?

The EP pad is the common drain node for both integrated MOSFETs and must be soldered to a minimum 25 mm² copper area on the PCB's inner or outer layer, connected via ≥4 thermal vias (0.3 mm diameter) to internal ground planes. This ensures junction temperature stays below 150°C at 9 A continuous current and maintains RSS(ON) stability across temperature.