Diodes Incorporated AP9101CAK-BZTRG1

Overview

AP9101CAK-BZTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.375V ±25mV, overdischarge detection at 2.500V ±35mV, discharge overcurrent detection at 0.150V ±15mV, and built-in fixed delay timing with no external capacitor required. It controls external N-channel MOSFETs via DO (discharge gate) and CO (charge gate) pins in portable power tools, Bluetooth headsets, and medical wearables.

For engineers reviewing the AP9101CAK-BZTRG1 datasheet, AP9101CAK-BZTRG1 pinout, AP9101CAK-BZTRG1 application, or AP9101CAK-BZTRG1 equivalent, this device supports selectable 0V battery charge function and power-down mode, delivers ultra-low 3.0µA typical operating current, and integrates overvoltage charger detection (8.0V fixed) with immediate response-critical for compact, safety-critical Li+ pack designs.

Technical Context

The AP9101CAK-BZTRG1 implements independent voltage monitoring paths: VDD–VSS for cell voltage (overcharge/overdischarge), and VM–VSS for current-sense voltage (discharge/charge overcurrent, short circuit). Its logic circuit uses internal reference trimming to maintain ±25mV overcharge detection accuracy across –40°C to +85°C.

It features dual-mode operation: power-down mode reduces current to 0.01µA (typ) when VM floats, while auto-wake-up mode remains active during overdischarge to enable recovery without charger presence. The CO and DO outputs drive external MOSFET gates directly with 2–10kΩ on-resistance, eliminating need for level-shifters in standard N-MOSFET configurations.

Key Specifications

Pinout & Package

AP9101CAK-BZTRG1 is packaged in SOT25 (5-pin) with gull-wing leads, optimized for space-constrained battery pack PCB layouts. Pin 1 marked with dot; moisture sensitivity level (MSL) = 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar lithium-ion battery protection applications.

Compared with R5460K001B-TR and BD14000FVJ-ME2, AP9101CAK-BZTRG1 uniquely combines factory-programmed 0V charge enablement, overvoltage charger detection, and sub-µA power-down current in a 5-pin SOT25 footprint-making it optimal for space-limited, safety-certifiable, single-cell consumer and medical Li+ packs.

Availability

AP9101CAK-BZTRG1 is available at Aetrix Electronics and suitable for portable power tools, wireless headsets, and medical wearables requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP9101CAK-BZTRG1 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 design centers across Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.

The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for high-accuracy, low-power, single-cell Li+ pack safety-targeting applications where reliability, regulatory compliance, and minimal external components are critical.

FAQ

What is the function of the VM pin on AP9101CAK-BZTRG1?

The VM pin serves as the current-sense input that measures voltage drop across an external sense resistor between the battery's P− terminal and system ground. It enables detection of discharge overcurrent, charge overcurrent, and short-circuit conditions by comparing VM–VSS against programmable thresholds (e.g., 0.150V for discharge overcurrent). Its internal RVMS/RVMD resistors support automatic status recovery during fault release.

Does AP9101CAK-BZTRG1 require external capacitors for timing functions?

No. AP9101CAK-BZTRG1 integrates fixed-time delay circuits for overcharge (tCU), overdischarge (tDL), and overcurrent (tDOC) detection, eliminating the need for external timing capacitors. This reduces bill-of-materials count, improves production yield, and avoids capacitor aging-related timing drift across temperature and lifetime.

How does the 0V battery charge function operate in AP9101CAK-BZTRG1?

The 0V battery charge function is factory-enabled in AP9101CAK-BZTRG1 and allows the IC to permit charging when the battery voltage is at 0V due to self-discharge. It activates when charger voltage exceeds 1.2V at VDD, enabling CO pin activation even with no initial cell voltage-eliminating need for external wake-up circuitry or manual reset procedures in end-user devices.

What is the maximum allowable voltage between VDD and VM pins?

The absolute maximum voltage between VDD and VM pins is 30V, as specified in the Absolute Maximum Ratings table. This rating supports direct monitoring of high-voltage chargers (e.g., 12V wall adapters) without external voltage dividers or clamping diodes, simplifying system-level protection architecture for USB PD or multi-voltage charging inputs.