Diodes Incorporated AP9214LA-AE-HSB-7

Overview

AP9214LA-AE-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 Li-ion packs. It provides overcharge (3.5–4.5 V, ±25 mV), overdischarge (2.0–3.4 V, ±35 mV), discharge/charge overcurrent (±15 mV), short-circuit (±100 mV), and overvoltage charger (8.0 V fixed, ±2 V) protection with built-in delay timers and 0V charge enable.

For engineers reviewing the AP9214LA-AE-HSB-7 datasheet, AP9214LA-AE-HSB-7 pinout, AP9214LA-AE-HSB-7 application in portable power systems, or AP9214LA-AE-HSB-7 equivalent for battery pack safety IC selection, this page delivers verified functional specifications, validated pin-level design meaning, real-world protection timing behavior, and direct substitution guidance aligned with Diodes' official DS38413 Rev. 4-3.

Technical Context

The AP9214LA-AE-HSB-7 implements independent analog comparators for V_DD–V_VSS (cell voltage), V_VM–V_VSS (discharge current sense), and V_VDD–V_VM (charger overvoltage), each feeding dedicated logic blocks with fixed delay timers (t_CU, t_DL, t_DOC, t_SHORT). Its dual-MOSFET architecture uses common-drain EP pad with separate S1 (discharge source) and S2 (charge source) terminals to isolate charge/discharge paths.

It supports two operational modes: Power-Down (0.1 µA standby, requires charger wake-up) or Auto-Wake-Up (5.5 µA standby, recovers from overdischarge via voltage rise). The 0V battery charge function is factory-configured (enabled in "AE" variant), allowing recharge of fully depleted cells using internal V_0CHA = 1.2 V threshold.

Key Specifications

Pinout & Package

AP9214LA-AE-HSB-7 is housed in U-DFN2535-6 (Type B) package with exposed thermal pad (EP), optimized for low-profile battery pack PCBs. Pin-out Option 1 (HSB) places NC on Pin 5; Pin 4 is VM. Thermal pad must be connected to large copper area for junction temperature control under 9 A load.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261A and RP506K, AP9214LA-AE-HSB-7 delivers lower system-level cost through integrated MOSFETs, tighter voltage accuracy for cell longevity, and full bidirectional protection - making it optimal for compact, high-reliability portable electronics where board space and protection fidelity are critical.

Availability

AP9214LA-AE-HSB-7 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headphone charging cases, medical portable monitors, and ruggedized handheld scanners requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for AP9214LA-AE-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 leadership in power management and protection solutions for consumer, industrial, and automotive markets.

The AP9214L series belongs to Diodes' battery protection IC product line, engineered specifically for space-constrained, high-accuracy 1-cell Li+ applications - emphasizing integration, ultra-low quiescent current, and factory-programmable thresholds to simplify pack design.

FAQ

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

The VM pin serves as the current-sense input for both charge and discharge paths. It connects to the negative side of the sense resistor (R2) placed between P− and S2. Voltage measured at VM relative to VSS determines discharge overcurrent (V_DOC), short-circuit (V_SHORT), and charge overcurrent (V_COC) events. Internal RVMS and RVMD pull-down/pull-up resistors enable automatic status recovery in overdischarge and overcurrent modes.

Does AP9214LA-AE-HSB-7 support automatic recovery from overdischarge without a charger?

Yes - because the "AE" suffix denotes the Auto-Wake-Up version. When in overdischarge state, it recovers automatically if either: (1) battery voltage rises to ≥VDU (e.g., 2.7 V) and remains there for ≥t_DLR (e.g., 1.0 s), or (2) a charger is connected and VM voltage drops below −0.7 V. This eliminates mandatory charger dependency unlike Power-Down ("A") variants.

How does the 0V battery charge function operate in AP9214LA-AE-HSB-7?

The 0V charge function is factory-enabled in "AE" devices. When battery voltage is 0 V, the IC detects V_0CHA ≥1.2 V at VDD to initiate charging - allowing safe recharge of self-discharged cells. This bypasses the normal VDL lockout, but only activates when VM voltage indicates valid charger presence. No external circuitry is needed to implement this feature.

What thermal design considerations apply to the EP pad of AP9214LA-AE-HSB-7?

The EP pad is the common drain node for both MOSFETs and must be connected to a ≥25 mm² copper area with ≥4 thermal vias (0.3 mm diameter) to an internal ground plane. At 9 A continuous current, junction-to-ambient thermal resistance drops from 150°C/W (no copper) to ≤45°C/W with proper layout - keeping T_J <125°C at +85°C ambient. Solder mask opening over EP is mandatory.