Diodes Incorporated AP9214LA-AM-HSBR-7

Overview

AP9214LA-AM-HSBR-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (RSS(ON) ≤ 16.5 mΩ), overcharge/overdischarge voltage detection (±25 mV accuracy), discharge overcurrent sensing (±15 mV), and short-circuit protection with 1 μs response. It operates in 1-cell Li-ion packs for portable power tools, Bluetooth headsets, and medical wearables.

For engineers reviewing the AP9214LA-AM-HSBR-7 datasheet, AP9214LA-AM-HSBR-7 pinout, AP9214LA-AM-HSBR-7 application, or AP9214LA-AM-HSBR-7 equivalent, key selection criteria include its U-DFN2535-6 (Type B, Option 2) package, selectable auto-wake-up mode, 0V charge enable, and ±15 mV discharge overcurrent detection tolerance at 25°C.

Technical Context

The AP9214LA-AM-HSBR-7 implements independent analog comparators for VDD–VSS (cell voltage), VM–VSS (discharge current), and VDD–VM (charge voltage), each feeding into logic-controlled delay timers (tCU/tDL/tDOC ±20% accuracy). Its dual-MOSFET architecture uses common-drain EP pad for thermal sharing and supports latch or auto-release overcharge modes.

It features factory-configured options: AM denotes auto-wake-up (not power-down), HSBR specifies Pin-Out Option 2 (VM on Pin 4, S2 on Pin 5, NC on Pin 4), and -7 indicates 3000-piece tape-and-reel packaging. The 0V battery charge function enables recovery of deeply discharged cells without external wake-up circuitry.

Key Specifications

Pinout & Package

AP9214LA-AM-HSBR-7 uses the U-DFN2535-6 (Type B) package with exposed thermal pad (EP), measuring 2.5 mm × 3.5 mm × 0.55 mm. Pin-Out Option 2 places VM on Pin 4 and S2 on Pin 5, with Pin 4 (NC) left floating.

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, AP9214LA-AM-HSBR-7 delivers superior thermal efficiency in ultra-compact form factor, guaranteed 0V charge functionality, and tighter ±15 mV discharge overcurrent tolerance-enabling higher current density and longer field deployment without maintenance.

Availability

AP9214LA-AM-HSBR-7 is available at Aetrix Electronics and suitable for portable power tools, wireless audio accessories, medical wearables, and smart home security devices requiring stable component supply and long-lifecycle support.

Supply support for AP9214LA-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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for high-volume industrial and consumer markets.

The AP9214L family targets cost-sensitive, space-constrained Li+ battery protection applications where integration, accuracy, and ultra-low quiescent current are critical-designed specifically for single-cell pack manufacturers seeking drop-in reliability without external timing or bias components.

FAQ

What is the function of the VM pin in AP9214LA-AM-HSBR-7?

The VM pin serves as the bidirectional current-sense node: it detects discharge overcurrent when voltage rises above VDOC (e.g., 0.15 V), charge overcurrent when voltage falls below VCOC (e.g., −0.10 V), and short circuits when exceeding VSHORT (e.g., 0.55 V). Internal resistors RVMD and RVMS connect dynamically to VDD or VSS during fault conditions to stabilize sensing and enable release timing.

Does AP9214LA-AM-HSBR-7 support overvoltage protection for the charger input?

Yes-it includes a dedicated overvoltage charger detection circuit that monitors VDD–VM voltage. When this exceeds 8.0 V (±2 V), the charging MOSFET turns off immediately (no delay); it re-enables when voltage drops below 7.3 V (±2 V). This protects against misapplication of 2-cell chargers to 1-cell packs, a known failure mode in field-replaceable battery systems.

How does the auto-wake-up (AM) mode differ from power-down mode in practice?

In auto-wake-up mode, the device remains active during overdischarge and automatically resumes normal operation when battery voltage rises above VDU (e.g., 2.5 V) for tDLR (e.g., 1.6 s). In contrast, power-down mode forces deep sleep (0.1 µA) and requires external charger connection to exit overdischarge-making AM essential for battery-powered IoT nodes that cannot guarantee charger access.

Can AP9214LA-AM-HSBR-7 be used with lithium iron phosphate (LiFePO₄) cells?

No-it is optimized for Li+ chemistry with overcharge detection thresholds starting at 3.5 V and fixed 4.25 V default. LiFePO₄ requires ~3.65 V overcharge cutoff and different hysteresis; using AP9214LA-AM-HSBR-7 would result in premature cutoff or unsafe overcharge. Diodes offers AP9221L variants with configurable thresholds for alternative chemistries.