Diodes Incorporated AP9101CK-ADTRG1

Overview

AP9101CK-ADTRG1 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, discharge overcurrent detection at 0.120V ±15mV, built-in fixed delay timing, and selectable power-down mode. It controls external N-channel MOSFETs via DO (discharge gate) and CO (charge gate) to enforce safety limits in portable power systems.

For engineers reviewing the AP9101CK-ADTRG1 datasheet, AP9101CK-ADTRG1 pinout, AP9101CK-ADTRG1 application, or AP9101CK-ADTRG1 equivalent, this device supports precise voltage monitoring, low-quiescent-current operation (3.0µA typ), 0V battery charge enablement, and high-voltage tolerance (30V VDD–VM), making it suitable for compact, safety-critical battery management designs.

Technical Context

The AP9101CK-ADTRG1 integrates independent voltage comparators for overcharge (VCU = 4.375V), overdischarge (VDL = 2.500V), and overvoltage charger (VOVCHG = 8.0V), each with programmable hysteresis and ±25–±100mV accuracy. Its logic circuit drives CO and DO outputs to control external FETs based on real-time VM–VSS and VDD–VSS measurements.

It implements fixed internal delay timers (tCU, tDL, tDOC, tSHORT, tCOC) with ±20% accuracy at +25°C and ±40% across –40°C to +85°C, eliminating external timing capacitors. The device supports two operating modes: power-down (0.01µA typ) requiring charger wake-up, or auto-wake-up enabling recovery from overdischarge without external stimulus.

Key Specifications

Pinout & Package

AP9101CK-ADTRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 is marked; no NC pin is used in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5460N258AA-TR and BD14000FVJ-E2, AP9101CK-ADTRG1 uniquely combines 0V battery charge enablement, 30V VDD–VM tolerance, and 8.0V overvoltage charger detection-making it optimal for USB-C powered wearables requiring robust fault coverage and extended shelf life.

Availability

AP9101CK-ADTRG1 is available at Aetrix Electronics and suitable for wireless headphones, Bluetooth trackers, portable medical sensors, and smart wearables requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for AP9101CK-ADTRG1 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, specializing in high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP9101C series belongs to Diodes' battery protection IC product line, designed specifically for single-cell Li+ applications demanding precision voltage thresholds, ultra-low quiescent current, and configurable safety features without external timing components.

FAQ

What is the function of the VM pin on AP9101CK-ADTRG1?

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 system ground. It enables detection of discharge overcurrent (at 0.120V threshold), charge overcurrent (−0.120V), and short-circuit events (0.700V), triggering DO or CO gate shutdown within microseconds. Its internal RVMS/RVMD resistors provide automatic pull-up/pull-down during fault states to ensure reliable FET control without external biasing.

Does AP9101CK-ADTRG1 support automatic recovery from overdischarge without a charger?

No-AP9101CK-ADTRG1 uses the power-down mode option (indicated by blank suffix in ordering code), which requires charger connection to exit overdischarge status. Unlike auto-wake-up variants (e.g., AP9101CA), this version enters deep sleep (0.01µA typ) and will not recover until VDD rises above the overdischarge release voltage (2.900V) *and* a charger is detected via VM pin voltage transition, ensuring intentional user-initiated recovery.

How does the 8.0V overvoltage charger detection work?

The AP9101CK-ADTRG1 continuously monitors the voltage difference between VDD and VM pins. When this exceeds 8.0V (±2V), the CO pin is immediately driven low to disable the charge FET-no delay timer applies. Recovery occurs when VDD–VM falls below 7.3V (±2V), restoring CO high. This protects against USB PD or fast-charger overvoltage faults without relying on external supervision circuitry.

Can AP9101CK-ADTRG1 be used with 2-cell battery packs?

No-it is strictly rated for 1-cell Li+ operation, with absolute maximum VDD–VSS of 12V and recommended operating range of 1.5V–5.5V. Applying it to 2-cell configurations (up to ~8.4V fully charged) violates its VDS rating and risks permanent damage. For multi-cell packs, Diodes offers dedicated solutions like the AP9211 (2-cell) or AP9221 (3-cell), which scale voltage detection ranges and FET drive capability accordingly.