Diodes Incorporated AP9101CAK-BOTRG1

Overview

AP9101CAK-BOTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell Li+ packs, featuring overcharge detection at 4.375V ±25mV, overdischarge detection at 2.500V ±35mV, and discharge overcurrent detection at 0.150V ±15mV. It integrates fixed-delay timing circuits, supports 0V battery charge functionality, and operates with 3.0µA typical current consumption in active mode.

For engineers reviewing the AP9101CAK-BOTRG1 datasheet, AP9101CAK-BOTRG1 pinout, AP9101CAK-BOTRG1 application, or AP9101CAK-BOTRG1 equivalent, this device is selected for precision voltage monitoring, low-power battery management in portable electronics, and robust MOSFET gate control in compact 1-cell pack designs.

Technical Context

The AP9101CAK-BOTRG1 implements independent analog comparators for overcharge (VCU), overdischarge (VDL), discharge overcurrent (VDOC), short-circuit (VSHORT), and charge overcurrent (VCOC), each with configurable thresholds and ±20% delay time accuracy. Its logic circuitry drives CO and DO outputs to control external N-channel MOSFETs in series with charge and discharge paths.

It features dual internal resistors (RVMD = 150–500kΩ, RVMS = 10–50kΩ) for VM-pin biasing during fault states, enabling automatic recovery from overdischarge and short-circuit conditions without external components. The device uses high-voltage CMOS process supporting up to 30V between VDD and VM pins.

Key Specifications

Pinout & Package

AP9101CAK-BOTRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 marked, top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S-8261AAB-M6T1U and RP502K001B-TR-F, the AP9101CAK-BOTRG1 delivers tighter voltage tolerances (±25mV vs ±50mV), lower active current (3.0µA vs ≥5.5µA), and unique overvoltage charger detection-making it optimal for high-reliability, space-constrained 1-cell applications where precision and integration matter.

Availability

AP9101CAK-BOTRG1 is available at Aetrix Electronics and suitable for wireless headphones, smart wearables, portable medical sensors, and USB-C power banks requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP9101CAK-BOTRG1 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 manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q200 for automotive-grade reliability.

The AP9101C belongs to Diodes' battery protection IC product line, engineered specifically for high-accuracy, low-power, single-chip safety management in consumer and portable medical Li+ battery packs.

FAQ

What is the function of the VM pin on AP9101CAK-BOTRG1?

The VM pin serves as the current-sense input that monitors 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 and VM–VDD voltages against internal thresholds. During fault states, internal resistors (RVMD/RVMS) connect to bias VM for automatic recovery.

Does AP9101CAK-BOTRG1 support both charge and discharge MOSFET control?

Yes. The CO pin controls the gate of the charge-path N-MOSFET, turning it off during overcharge or charge overcurrent. The DO pin controls the discharge-path N-MOSFET, turning it off during overdischarge, discharge overcurrent, or short-circuit events. Both outputs drive directly into MOSFET gates with R_COH/R_DOH = 2–10kΩ typical pull-up resistance.

How does the 0V battery charge function operate in AP9101CAK-BOTRG1?

This function is factory-enabled in the "AK" variant and allows the IC to initiate charging when the battery voltage is 0V due to self-discharge. It does so by permitting the charger to raise the VDD voltage above 1.2V (V0CHA), triggering wake-up and enabling CO output. Without this feature, the device would remain latched in overdischarge and block all charging.

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

The absolute maximum rating between VDD and VM is 30V, enabled by Diodes' high-voltage CMOS process. This allows safe operation with common USB PD chargers (up to 20V) and accommodates transient spikes without latch-up or damage. The overvoltage charger detection circuit (VOVCHG = 8.0V ±2V) provides secondary protection by disabling CO if VDD–VM exceeds this threshold.