Diodes Incorporated AP9214L-AM-HSBR-7

Overview

AP9214L-AM-HSBR-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (R_SS(ON) = 13.5 mΩ typ at V_DD = 3.9 V) and precision voltage/current detection circuitry for 1-cell rechargeable battery packs. It provides overcharge (3.5–4.5 V, ±25 mV), overdischarge (2.0–3.4 V, ±35 mV), discharge/charge overcurrent (±15 mV), and short-circuit (±100 mV) protection with fixed delay timing and 0V charge enable functionality in U-DFN2535-6 (Type B, Option 2) package.

For engineers reviewing the AP9214L-AM-HSBR-7 datasheet, AP9214L-AM-HSBR-7 pinout, AP9214L-AM-HSBR-7 application, or AP9214L-AM-HSBR-7 equivalent, this device supports critical safety-critical decisions in portable power systems where accurate cell voltage monitoring, ultra-low quiescent current (3.0 µA typ), and integrated MOSFET thermal management via EP pad are required.

Technical Context

The AP9214L-AM-HSBR-7 implements independent high-accuracy analog comparators for six protection conditions-overcharge, overdischarge, discharge overcurrent, charge overcurrent, load short, and overvoltage charger-with ±25 mV to ±100 mV accuracy across temperature. Its logic circuit controls two internal N-MOSFETs sharing a common drain (EP pad), enabling bidirectional current path control without external FETs.

It features factory-configurable options including Power-Down Mode (AM = Auto-Wake-Up disabled), 0V Battery Charge Enable, and Overcharge Protection Mode (Auto Release). Detection delay times (e.g., t_CU, t_DL) are built-in with ±20% accuracy at +25°C and ±40% over –40°C to +85°C, eliminating external RC timing components.

Key Specifications

Pinout & Package

AP9214L-AM-HSBR-7 uses the U-DFN2535-6 (Type B, Option 2) package: 2.5 mm × 3.5 mm × 0.55 mm body with exposed thermal pad (EP) on bottom. Pin 1–6 arranged as S1–VSS–VDD–VM–S2–NC (top view); EP must be soldered to large PCB copper area for thermal dissipation.

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 RP502K001B-TR-F, the AP9214L-AM-HSBR-7 delivers full bidirectional protection with lower system-level BOM cost, faster short-circuit response, and guaranteed 0V charge recovery-making it optimal for compact, high-reliability consumer and medical battery packs.

Availability

AP9214L-AM-HSBR-7 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headphone charging cases, medical wearable sensors, and smart home door lock batteries requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP9214L-AM-HSBR-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 for power management, signal integrity, and protection applications.

The AP9214L belongs to Diodes' battery protection IC product line, designed specifically for space-constrained, high-safety 1-cell Li+ applications in consumer, medical, and industrial portable equipment.

FAQ

What is the function of the VM pin in AP9214L-AM-HSBR-7?

The VM pin serves as the bidirectional current sense node: its voltage relative to VSS detects discharge overcurrent and short circuits, while its voltage relative to VDD detects charge overcurrent. Internally, it connects to RVMS (pull-down) and RVMD (pull-up) resistors to enable automatic status recovery-e.g., pulling VM to VSS after load removal releases short-circuit protection.

Does AP9214L-AM-HSBR-7 support overvoltage protection for the charger input?

Yes-it includes a dedicated overvoltage charger detection circuit that monitors the voltage between VDD and VM pins. When this exceeds 8.0 V (±2 V), the charging MOSFET turns off immediately; it re-enables when the voltage drops below 7.3 V (±2 V), with no delay timing applied to this function.

How does the "AM" suffix affect power-down behavior?

The "AM" suffix indicates Auto-Wake-Up is disabled. In overdischarge state, the device enters true power-down mode (I_Q ≤ 0.1 µA) and remains latched until a charger is connected-preventing accidental discharge recovery and ensuring controlled system reset before reuse.

Can AP9214L-AM-HSBR-7 be used with LiFePO₄ cells?

No-it is optimized for Li+ chemistry with V_CU range 3.5–4.5 V and V_DL range 2.0–3.4 V. LiFePO₄ requires ~3.65 V overcharge detection and ~2.0 V discharge cutoff, but its flat voltage curve makes precise V_DL detection unreliable; use a LiFePO₄-specific protector like the AP9221 series instead.