Diodes Incorporated AP9101CK-BBTRG1

Overview

AP9101CK-BBTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.425 V ±25 mV, overdischarge detection at 2.500 V ±35 mV, discharge overcurrent detection at 0.150 V ±15 mV, and built-in fixed delay timing with no external capacitor required. It controls external N-channel MOSFETs via dedicated CO and DO gate drive pins to protect against voltage, current, and short-circuit faults in portable power systems.

For engineers reviewing the AP9101CK-BBTRG1 datasheet, AP9101CK-BBTRG1 pinout, AP9101CK-BBTRG1 application, or AP9101CK-BBTRG1 equivalent, this device supports precise 1-cell Li+ pack safety management with selectable power-down mode, 0V battery charge capability, and high-voltage tolerance (30 V between VDD and VM) - critical for compact, low-power, and high-reliability battery management designs.

Technical Context

The AP9101CK-BBTRG1 implements dual-MOSFET control logic with independent CO (charge FET) and DO (discharge FET) outputs, using internal voltage comparators and precision reference circuits to monitor VDD–VSS (cell voltage) and VM–VSS (current-sense voltage). Its operation includes auto-release overcharge protection and configurable overdischarge recovery modes.

It integrates fixed-time delay circuits for all fault conditions (e.g., tCU = 1.0 s typ for overcharge, tSHORT = 8 µs typ for short-circuit), eliminating external timing components. The IC operates across –40°C to +85°C with supply voltage range 1.5–5.5 V and supports factory-configured options including power-down mode disable (Auto-Wake-Up) and 0V battery charge enable.

Key Specifications

Pinout & Package

AP9101CK-BBTRG1 is packaged in SOT25 (5-pin), a surface-mount plastic package with 0.95 mm pitch and thermal pad-compatible footprint. Pin 1 marked with dot; pinout validated per Diodes DS37771 Rev. 8–3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5460N255AA-TR and SE9011A-2500F, AP9101CK-BBTRG1 delivers superior system resilience through integrated overvoltage charger detection, 0V battery charge, and tighter ±25 mV overcharge accuracy - directly reducing field failure risk in consumer electronics with variable charging sources.

Availability

AP9101CK-BBTRG1 is available at Aetrix Electronics and suitable for smart wearables, wireless audio devices, portable medical sensors, and gaming peripherals requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.

Supply support for AP9101CK-BBTRG1 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The AP9101C series belongs to Diodes' Battery Protection IC product line, engineered specifically for high-precision, low-quiescent-current safety management in single-cell lithium-ion and lithium-polymer battery packs used in space-constrained portable electronics.

FAQ

What is the function of the VM pin on AP9101CK-BBTRG1?

The VM pin serves as the current-sense input that monitors the voltage drop across an external sense resistor between the battery's P– terminal and load/charger path. It enables detection of discharge overcurrent, charge overcurrent, and short-circuit conditions by comparing VM–VSS against internal thresholds (e.g., 0.150 V for discharge overcurrent). Its high-impedance design minimizes measurement error and supports accurate current sensing down to milliamp levels.

Does AP9101CK-BBTRG1 support both charge and discharge FET control?

Yes - AP9101CK-BBTRG1 provides independent gate drive outputs: CO pin controls the charge FET (typically connected between charger and battery positive), and DO pin controls the discharge FET (between battery positive and load). Each output switches between high-impedance and low-level states to turn off its respective FET during fault conditions, enabling full bidirectional protection without external logic.

Can AP9101CK-BBTRG1 be used with 2-cell or higher battery configurations?

No - AP9101CK-BBTRG1 is designed exclusively for 1-cell Li+ or Li-polymer batteries with nominal voltages of 3.0–4.2 V. Its overcharge detection range (up to 4.5 V) and absolute maximum VDD–VSS rating (12 V) do not support series-connected cells. For multi-cell packs, Diodes offers the AP9211 or AP9221 families with cascaded or high-voltage architectures.

Is the power-down mode enabled by default on AP9101CK-BBTRG1?

Yes - the "BB" suffix in AP9101CK-BBTRG1 indicates factory configuration with power-down mode enabled (i.e., Auto-Wake-Up disabled). In this mode, the IC enters ultra-low-current sleep (<0.1 µA) during overdischarge and requires charger connection to resume normal operation. To use Auto-Wake-Up, select part numbers with "BA" or "BC" suffixes per Diodes' ordering guide.