Diodes Incorporated AP9214LA-AJ-HSB-7

Overview

AP9214LA-AJ-HSB-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (R_SS(ON) = 13 mΩ typ at V_DD = 4.0 V) 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 overcurrent (VDOC = 0.15 V ±15 mV), short-circuit (VSHORT = 0.60 V ±100 mV), and charge overcurrent (VCOC = −0.10 V ±15 mV) protection with fixed delay timing and 0V battery charge enable.

For engineers reviewing the AP9214LA-AJ-HSB-7 datasheet, AP9214LA-AJ-HSB-7 pinout, AP9214LA-AJ-HSB-7 application, or AP9214LA-AJ-HSB-7 equivalent, this device supports high-accuracy, low-quiescent-current (3.0 µA typ in normal mode) battery safety control in space-constrained portable electronics requiring integrated MOSFETs and configurable protection modes.

Technical Context

The AP9214LA-AJ-HSB-7 implements dual independent protection paths using internal logic to control two N-channel MOSFETs with common drain (EP pad). Its voltage detection circuitry operates across −40°C to +85°C with ±25 mV overcharge detection accuracy and ±35 mV overdischarge detection accuracy at +25°C, while supporting selectable power-down mode and auto-release/latch overcharge behavior.

It features built-in fixed delay timers (tCU = 1.0 s typ, tDOC = 12 ms typ, tSHORT = 250 µs typ) with ±20% accuracy at +25°C, and integrates VM-sense resistor interface logic (RVMD = 300 kΩ typ, RVMS = 30 kΩ typ) to monitor charge/discharge current via external R2. The device supports 0V battery charging initiation at V_0CHA = 1.2 V (min) and includes overvoltage charger detection (VOVCHG = 8.0 V ±2 V).

Key Specifications

Pinout & Package

AP9214LA-AJ-HSB-7 is housed in a U-DFN2535-6 (Type B) package with exposed thermal pad (EP), optimized for compact battery pack PCB layouts and efficient heat dissipation. Pin-out Option 1 applies (HSB suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAB-M6T1U and RP506K001A-TR-F, AP9214LA-AJ-HSB-7 delivers lower system-level component count (no external FETs), superior low-power performance (0.1 µA power-down), and unique factory-programmed 0V charge capability - making it optimal for next-generation compact, long-shelf-life battery packs.

Availability

AP9214LA-AJ-HSB-7 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headphone charging cases, medical wearable sensors, and smart lock backup batteries requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for AP9214LA-AJ-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, with manufacturing certified to IATF 16949 and product qualification per AEC-Q100/101 standards.

The AP9214L series belongs to Diodes' battery protection IC product line, engineered specifically for high-reliability, space-constrained 1-cell Li+ applications where integration, accuracy, and ultra-low power are critical design requirements.

FAQ

What is the function of the NC pin on AP9214LA-AJ-HSB-7?

Pin 5 is designated NC (No Connect) per the U-DFN2535-6 (Type B) Option 1 pinout. It is internally unconnected and must remain electrically floating-no trace, solder, or test point should be attached. Connecting it risks latch-up or undefined behavior due to internal isolation structure.

Can AP9214LA-AJ-HSB-7 support bidirectional current sensing?

Yes. The VM pin senses voltage polarity relative to VSS: positive voltage indicates discharge current (S1→load), negative voltage indicates charge current (S2→battery). Internal RVMD/RVMS resistors enable automatic mode switching between charge and discharge protection paths without external control signals.

How does the 0V battery charge function operate in practice?

When battery voltage is 0 V, the AP9214LA-AJ-HSB-7 monitors VDD and activates internal wake-up logic once V_0CHA ≥ 1.2 V is reached (e.g., from charger applying ~1.5 V). It then enables the charging MOSFET, allowing current to flow and restore cell voltage above 2.5 V before full protection resumes.

What thermal design guidance applies to the EP pad?

The EP pad is the common drain for both MOSFETs and must be connected to a minimum 25 mm² copper area (2 oz Cu) with ≥4 thermal vias (0.3 mm diameter) to internal ground planes. This achieves ≤45°C/W junction-to-ambient thermal resistance, ensuring safe operation at 9 A continuous current in +70°C ambient.