Diodes Incorporated AP9101CAK-BJTRG1

Overview

AP9101CAK-BJTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, integrating overcharge (4.375 V ±25 mV), overdischarge (2.500 V ±35 mV), discharge overcurrent (0.150 V ±15 mV), charge overcurrent (−0.150 V ±15 mV), and short-circuit (0.700 V ±100 mV) detection with fixed delay timing and 0V battery charge enable. It drives external N-channel MOSFETs via DO and CO pins in SOT25 package.

For engineers reviewing the AP9101CAK-BJTRG1 datasheet, AP9101CAK-BJTRG1 pinout, AP9101CAK-BJTRG1 application, or AP9101CAK-BJTRG1 equivalent, this device supports precise, low-power battery safety control in portable power tools, medical wearables, and Bluetooth earbuds where voltage accuracy, sub-µA power-down current (0.01 µA typ), and integrated hysteresis are critical selection criteria.

Technical Context

The AP9101CAK-BJTRG1 implements independent analog comparators for six fault conditions-overcharge, overdischarge, discharge/charge overcurrent, short circuit, and overvoltage charger-with dedicated internal reference voltages and ±20% delay time accuracy. Its logic circuitry enforces auto-release recovery mode and supports selectable 0V battery charging.

It uses high-voltage CMOS process enabling 30 V VM–VDD rating, features built-in RVMD/RVMS sense resistors (300 kΩ/30 kΩ typ), and operates across −40°C to +85°C with supply voltage range 1.5–5.5 V. Power-down mode reduces current to 0.01 µA at 25°C while retaining wake-up capability via charger connection.

Key Specifications

Pinout & Package

AP9101CAK-BJTRG1 is housed in a RoHS-compliant, lead-free SOT25 (SC-74A) surface-mount package measuring 2.9 mm × 1.6 mm × 1.1 mm, optimized for compact battery pack PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, AP9101CAK-BJTRG1 uniquely combines factory-programmed 0V charge enable, ultra-low 0.01 µA power-down current, and SOT25 footprint-making it optimal for space-constrained, long-storage, single-cell consumer electronics where recovery reliability is mandatory.

Availability

AP9101CAK-BJTRG1 is available at Aetrix Electronics and suitable for power tools, medical wearables, Bluetooth earbuds, and portable diagnostic devices requiring stable component supply, long-term lifecycle support, and guaranteed green/RoHS compliance.

Supply support for AP9101CAK-BJTRG1 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 design, manufacturing, and distribution operations across Asia, the Americas, and Europe.

The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for high-accuracy, low-quiescent-current safety management in compact 1-cell lithium-ion and lithium-polymer battery packs.

FAQ

What is the function of the VM pin on AP9101CAK-BJTRG1?

The VM pin serves as the current-sense input terminal that monitors the voltage difference between the battery's P− node and system ground. It connects to the source of the discharge MOSFET and enables detection of discharge overcurrent, charge overcurrent, and short-circuit faults by comparing the sensed voltage against internal thresholds (e.g., 0.150 V for discharge overcurrent). Internal RVMS and RVMD resistors provide bias paths during fault states.

Does AP9101CAK-BJTRG1 support automatic recovery from overdischarge?

Yes-AP9101CAK-BJTRG1 supports auto-wake-up functionality. When in overdischarge state, it recovers to normal operation once the battery voltage rises above the overdischarge release voltage (2.900 V) and remains there for the required delay time. This occurs without external intervention, provided the 0V battery charge function is enabled and the device is configured for auto-wake-up mode (denoted by "A" in ordering code).

How does the overvoltage charger detection feature operate?

The overvoltage charger detection circuit continuously monitors the voltage between VDD and VM pins. If this voltage exceeds 8.0 V (±2 V), the CO pin is immediately driven low to disable the charge MOSFET. Recovery occurs when the voltage drops below 7.3 V (±2 V), restoring CO to high impedance. No delay timer applies-response is near-instantaneous to protect against charger faults.

Can AP9101CAK-BJTRG1 be used with both N-channel and P-channel MOSFETs?

AP9101CAK-BJTRG1 is designed exclusively for N-channel MOSFET configurations. Its DO and CO outputs drive the gates of external N-MOSFETs placed in the discharge and charge paths respectively. The IC does not provide level-shifting or high-side drive capability required for P-channel use, and its output voltage swing is referenced to VSS-not floating-making P-channel implementation incompatible.