Diodes Incorporated AP9101CAK-AMTRG1

Overview

AP9101CAK-AMTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, integrating overcharge (4.375V), overdischarge (2.300V), discharge overcurrent (0.180V), charge overcurrent (−0.180V), short-circuit (0.700V), and overvoltage charger (8.0V) detection with ±25mV to ±100mV accuracy. It drives external N-channel MOSFETs via CO/DO pins and supports 0V battery charging and selectable power-down mode.

For engineers reviewing the AP9101CAK-AMTRG1 datasheet, AP9101CAK-AMTRG1 pinout, AP9101CAK-AMTRG1 application, or AP9101CAK-AMTRG1 equivalent, this device is selected for compact, low-power, high-accuracy battery safety in portable electronics where precise voltage thresholds, fixed delay timing, and minimal external components are required.

Technical Context

The AP9101CAK-AMTRG1 implements independent analog comparators for six fault conditions-overcharge, overdischarge, discharge overcurrent, charge overcurrent, short circuit, and overvoltage charger-with dedicated hysteresis and fixed delay timers (e.g., tCU = 1.0s typ, tSHORT = 8µs typ). Its logic circuit controls CO and DO outputs using level-shifted gate drivers compatible with up to 30V VDD–VM differential voltage.

It features dual internal resistive networks (RVMD = 100–650kΩ, RVMS = 5–65kΩ) for VM-sense biasing during overdischarge and short-circuit states, enabling automatic recovery without external components. The device operates across −40°C to +85°C with 3.0µA typical operating current and 0.1µA power-down current.

Key Specifications

Pinout & Package

AP9101CAK-AMTRG1 is packaged in SOT25 (5-pin) with exposed pad for thermal performance and RoHS/Green compliance. Pin 1 marked; no NC pin in SOT25 configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery protection IC applications.

Compared with S-8261AAB-M6T1U and RP502K001B-TR-F, AP9101CAK-AMTRG1 uniquely combines 0V charge enable, overvoltage charger detection, and SOT25 packaging in a single 1-cell solution - delivering higher functional integration and smaller footprint without sacrificing accuracy or safety coverage.

Availability

AP9101CAK-AMTRG1 is available at Aetrix Electronics and suitable for smartphone battery packs, wireless earbud batteries, Bluetooth speaker power modules, and portable medical sensors requiring stable component supply, full RoHS/Green compliance, and guaranteed long-term lifecycle support.

Supply support for AP9101CAK-AMTRG1 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 devices, with design, manufacturing, and logistics operations certified to IATF 16949 and ISO 9001 standards.

The AP9101C series targets compact, high-reliability battery protection in consumer and portable medical applications, emphasizing low quiescent current, factory-programmable thresholds, and minimal external component count.

FAQ

What is the function of the VM pin on AP9101CAK-AMTRG1?

The VM pin serves as the current-sense input that monitors voltage drop across an external sense resistor (R2) between P− and battery negative. It enables detection of discharge overcurrent, charge overcurrent, and short-circuit conditions. Internal resistive networks (RVMD and RVMS) automatically bias VM during overdischarge and short events to ensure reliable MOSFET control without external components.

Does AP9101CAK-AMTRG1 support automatic recovery from overdischarge?

Yes - AP9101CAK-AMTRG1 supports auto-wake-up from overdischarge. When the battery voltage rises above the overdischarge release voltage (2.400V), and the VM-to-VSS voltage remains below −0.7V for the release delay time, the device restores normal operation. This eliminates need for external wake-up circuitry in portable designs.

How does the overvoltage charger protection work in AP9101CAK-AMTRG1?

The overvoltage charger protection monitors voltage between VDD and VM pins. If it exceeds 8.0V (±2V), the CO pin is immediately driven low to disable the charge MOSFET. Recovery occurs when the voltage drops below 7.3V (±2V), with no intentional delay - providing instantaneous protection against faulty or mismatched chargers.

Can AP9101CAK-AMTRG1 be used with 2-cell battery packs?

No - AP9101CAK-AMTRG1 is designed exclusively for 1-cell Li-ion/Li-polymer applications. Its absolute maximum VDD–VSS rating is 12V, and its voltage detection ranges (e.g., 2.300V–4.375V) are calibrated for single-cell operation. For 2-cell stacks, use Diodes' AP9211 or equivalent multi-cell protection ICs.