Diodes Incorporated AP9214LA-AC-HSB-7

Overview

AP9214LA-AC-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 (3.85 V ±25 mV), overdischarge (2.50 V ±35 mV), discharge overcurrent (0.15 V ±15 mV), short-circuit (0.55 V ±100 mV), and overvoltage charger (8.0 V ±2 V) protection with fixed delay timing, targeting portable power tools and medical handheld devices.

For engineers reviewing the AP9214LA-AC-HSB-7 datasheet, AP9214LA-AC-HSB-7 pinout, AP9214LA-AC-HSB-7 application, or AP9214LA-AC-HSB-7 equivalent, this page delivers verified functional roles, validated pin assignments for U-DFN2535-6 (Type B, Option 1), confirmed protection thresholds, real-world timing behavior, and direct substitution guidance - all grounded in Diodes' DS38413 Rev. 4-3 specification.

Technical Context

The AP9214LA-AC-HSB-7 implements independent analog comparators for V_CU/V_CL, V_DL/V_DU, V_DOC, V_SHORT, and V_COC, each feeding dedicated logic circuits with ±20% delay accuracy. Its dual-MOSFET architecture uses common-drain EP pad and separate S1/S2 source terminals to isolate charge and discharge current paths while enabling bidirectional sensing via VM.

It supports factory-configured options: auto-wake-up (not power-down), 0V battery charge enable, and latch-mode overcharge protection. The internal RVMD (300 kΩ typ) and RVMS (30 kΩ typ) resistors provide automatic pull-up/pull-down during fault states without external components, reducing BOM count and PCB footprint.

Key Specifications

Pinout & Package

AP9214LA-AC-HSB-7 is housed in a 2.5 mm × 3.5 mm U-DFN2535-6 (Type B) package with exposed thermal pad (EP), optimized for high-current battery management in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAL-M6T1U and RP506K001B-TR-F, AP9214LA-AC-HSB-7 delivers superior system-level safety through integrated overvoltage charger blocking, tighter voltage tolerances (±25 mV vs ±30–50 mV), and guaranteed 0V charge capability - all in a single U-DFN2535-6 package without external FETs or timing resistors.

Availability

AP9214LA-AC-HSB-7 is available at Aetrix Electronics and suitable for power tools, medical handheld devices, wireless headphones, and IoT asset trackers requiring stable component supply, long-term lifecycle support, and automotive-grade reliability assurance.

Supply support for AP9214LA-AC-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 ICs, with manufacturing certified to IATF 16949 and products qualified per AEC-Q100/101/200 standards.

The AP9214L series belongs to Diodes' Battery Protection IC product line, engineered specifically for compact, high-reliability 1-cell Li+ systems in portable industrial and medical equipment where space, safety, and longevity are critical.

FAQ

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

Pin 4 is designated NC (No Connect) in U-DFN2535-6 Type B Option 1 configuration and must remain electrically floating. Connecting it to any potential - including ground or VSS - violates the internal logic state machine and may cause unpredictable overcharge or overdischarge release behavior. This pin has no internal connection and serves only as mechanical alignment marker.

How does the VM pin enable bidirectional current sensing?

The VM pin senses voltage relative to VSS: positive voltage indicates discharge current (S1→load), negative voltage indicates charge current (charger→S2). Internal RVMS (30 kΩ) pulls VM to VSS during discharge faults, while RVMD (300 kΩ) pulls VM to VDD during overcharge, enabling direction-aware protection without external op-amps or polarity switches.

Can AP9214LA-AC-HSB-7 support fast charging above 3 A?

Yes - its 13 mΩ R_SS(ON) and 9 A continuous drain rating (T_A = +25°C) support ≥3 A charging with ≤120 mW conduction loss. However, fast-charge validation requires verifying R2 (2.7 kΩ) power rating under pulse conditions and confirming PCB copper weight handles peak current without exceeding 85°C junction temperature per DS38413 thermal derating curves.

What triggers the overvoltage charger protection function?

This function activates when voltage between VDD and VM exceeds 8.0 V (±2 V), independent of battery voltage or delay timers. It immediately disables the charge MOSFET (S2) until V_DD–VM drops below 7.3 V (±2 V), protecting against defective wall adapters or USB-PD negotiators delivering >5.5 V to the pack - a failure mode not covered by standard overcharge detection.