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Diodes Incorporated AP9101CK-AITRG1
- Part No.:
- AP9101CK-AITRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-AITRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,535
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Product details
Overview
AP9101CK-AITRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell Li+ packs, featuring overcharge detection at 4.500V ±25mV, overdischarge detection at 2.400V ±35mV, discharge overcurrent detection at 0.150V ±15mV, and built-in fixed delay timing with no external capacitor required. It controls external N-channel MOSFETs via DO (discharge gate) and CO (charge gate) pins in portable power tools, Bluetooth headsets, and medical wearables.
For engineers reviewing the AP9101CK-AITRG1 datasheet, AP9101CK-AITRG1 pinout, AP9101CK-AITRG1 application, or AP9101CK-AITRG1 equivalent, this device delivers precision voltage thresholds, selectable 0V charge function, auto-release overcharge mode, and high-voltage tolerance (30V VDD–VM) - critical for robust 1-cell battery pack safety design.
Technical Context
The AP9101CK-AITRG1 integrates independent analog comparators for overcharge (VCU = 4.500V), overdischarge (VDL = 2.400V), discharge overcurrent (VDOC = 0.150V), short-circuit (VSHORT = 0.700V), and charge overcurrent (VCOC = −0.075V), each with configurable hysteresis and ±20% delay accuracy. Its logic circuit drives CO/DO outputs directly without external level shifters.
It operates across −40°C to +85°C with supply voltage from 1.5V to 5.5V, supports 0V battery charging initiation at ≥1.2V charger input, and includes overvoltage charger detection (8.0V typ) with immediate CO shutdown - all implemented in a high-voltage CMOS process enabling 30V differential rating between VDD and VM pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.500V ±25mV - sets precise upper cell voltage limit before CO pin disables charge FET |
| Overdischarge Detection Voltage | 2.400V ±35mV - triggers DO pin shutdown to prevent deep discharge damage to Li+ cell |
| Discharge Overcurrent Threshold | 0.150V ±15mV - detects excessive load current via sense resistor voltage drop at VM pin |
| Charge Overcurrent Threshold | −0.075V ±15mV - monitors reverse current during charging to disable CO on overcurrent fault |
| Operating Supply Range | 1.5V to 5.5V - ensures reliable operation across full Li+ cell voltage range (2.5V–4.5V) |
| Quiescent Current | 3.0µA typ - enables multi-year shelf life in battery-powered standby applications |
| VDD–VM Absolute Max | 30V - allows direct connection to high-voltage chargers without external clamping |
Pinout & Package
AP9101CK-AITRG1 is housed in a RoHS-compliant SOT25 (5-pin) package with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 marked with dot; moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current Sense Input | Monitors voltage drop across external sense resistor (R2) to detect charge/discharge overcurrent and short-circuit conditions |
| VDD | Positive Power Input | Connects to battery anode (P+) to power IC and reference internal voltage detection circuits |
| VSS | Negative Power Input | Connects to battery cathode (P−) as ground reference for all analog comparators and logic |
| DO | Discharge Control Output | Drives gate of external N-MOSFET (Q2) to disconnect load when overdischarge or discharge overcurrent occurs |
| CO | Charge Control Output | Drives gate of external N-MOSFET (Q1) to disconnect charger when overcharge, charge overcurrent, or overvoltage charger fault occurs |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Delay Timing Circuit | Eliminates need for external timing capacitors - reduces BOM count and PCB area in compact battery packs |
| Selectable 0V Battery Charge | Factory-configured "Permission" enables safe recharge of deeply discharged cells down to 0V without manual reset |
| Auto-Release Overcharge Mode | Automatically re-enables charging when cell voltage drops below 4.300V (VCL), avoiding manual intervention |
| Overvoltage Charger Detection | 8.0V detection (±2V) with immediate CO shutdown protects against faulty >5V USB-C or proprietary chargers |
| Power-Down Mode Option | Reduces current to 0.1µA typ in overdischarge state - extends storage life for shipped battery modules |
Applications
| Power Tools | Wireless Headsets |
|---|---|
Use Scenario: Cordless drill battery pack with 1-cell Li+ configuration subjected to high-pulse discharge currents up to 20A. IC Role / Device Role / Timing Role: Protection IC monitoring cell voltage and VM-sense voltage to cut off discharge FET within 14ms (tDOC typ) during overload. Use Value: Prevents thermal runaway by enforcing 2.400V minimum cutoff and 0.150V discharge overcurrent threshold matched to 5mΩ sense resistor. |
Use Scenario: Compact Bluetooth earbud case with integrated 1-cell Li+ battery charged via USB-C PD adapter. IC Role / Device Role / Timing Role: Dual-role protector detecting both overcharge (4.500V) and overvoltage charger faults (8.0V) to disable CO output instantly. Use Value: Ensures compatibility with variable-input USB-C chargers while maintaining tight 25mV overcharge accuracy for long cycle life. |
| Medical Wearables | Portable ECG Monitors |
Use Scenario: Skin-contact patch delivering continuous biosignal monitoring powered by sealed 1-cell Li+ battery. IC Role / Device Role / Timing Role: Low-power protector operating in 3.0µA mode to preserve battery capacity during 30-day clinical deployment. Use Value: Enables >10-year shelf life via 0.1µA power-down mode and eliminates need for service-mode jumpers or external wake-up circuitry. |
Use Scenario: Handheld ECG device requiring FDA-grade reliability and immunity to accidental reverse-connection events. IC Role / Device Role / Timing Role: Fault manager using RVMD/RVMS internal resistors to pull up VM during overdischarge and auto-recover only upon valid charge voltage ≥1.2V. Use Value: Guarantees fail-safe behavior: no discharge until verified charge presence, preventing unintended patient-device disconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar lithium-ion battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Seiko Instruments S-8261AAL-M6T1U | Fixed 4.25V overcharge threshold; no overvoltage charger detection; requires external timing capacitor | Lacks 8.0V charger overvoltage protection and fixed-delay architecture - unsuitable for USB-C fast-charge environments | Choose only if cost-sensitive designs accept reduced charger fault coverage and higher BOM count |
| Ricoh RP502K001B-TR-F | Supports 2-cell stacks; 4.20V overcharge; no 0V charge function; 5.5µA operating current | Designed for multi-cell systems; higher quiescent current reduces shelf-life suitability for single-cell wearables | Select only for legacy 2-cell platforms - not drop-in compatible due to different pinout and voltage programming |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, AP9101CK-AITRG1 uniquely combines 4.500V precision overcharge detection, integrated overvoltage charger protection, and capacitor-free timing - making it optimal for next-gen single-cell USB-C–charged devices demanding minimal footprint and maximum fault coverage.
Availability
AP9101CK-AITRG1 is available at Aetrix Electronics and suitable for power tools, wireless headsets, medical wearables, and portable ECG monitors requiring stable component supply, long-term lifecycle support, and guaranteed green compliance.
Supply support for AP9101CK-AITRG1 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 solutions, with manufacturing certified to IATF 16949 and product lines compliant with AEC-Q100/101 standards.
The AP9101C series targets single-cell Li+ battery protection in consumer and medical portable electronics, emphasizing ultra-low power consumption, high-voltage robustness, and factory-programmable safety thresholds.
FAQ
What is the function of the VM pin on AP9101CK-AITRG1?
The VM pin serves as the current-sense input terminal that measures voltage drop across an external sense resistor (R2) between P− and VM. It enables detection of discharge overcurrent, charge overcurrent, and short-circuit conditions. Internal resistors RVMD and RVMS connect dynamically during fault states to bias VM for recovery control - no external components are needed for these functions.
Does AP9101CK-AITRG1 support automatic recovery from overdischarge?
Yes - AP9101CK-AITRG1 supports auto-wake-up from overdischarge when the 0V battery charge function is enabled (as indicated by "Permission" in ordering code). Recovery occurs when battery voltage rises above 2.800V (VDU) or when a ≥1.2V charger voltage is applied, eliminating need for external reset circuitry or manual intervention.
How does the overvoltage charger detection feature operate?
The overvoltage charger detection monitors voltage between VDD and VM pins. When this differential exceeds 8.0V (±2V), the CO pin immediately goes low to disable the charge MOSFET. Release occurs when voltage falls below 7.3V (±2V), with no intentional delay - providing instantaneous protection against defective or non-compliant USB-C chargers.
Can AP9101CK-AITRG1 be used with 2-cell battery configurations?
No - AP9101CK-AITRG1 is strictly designed for 1-cell Li+ or Li-polymer batteries with maximum VDD–VSS operating range of 1.5V to 5.5V. Its overcharge detection threshold (4.500V) and absolute maximum VDD–VSS rating (12V) do not support series-connected 2-cell stacks, which require dedicated dual-cell protectors like AP9211 or S-8261B.
AP9101CK-AITRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- Over Current, Over Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP9101CK-AITRG1 FAQ
1.How can I place an order for AP9101CK-AITRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-AITRG1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP9101CK-AITRG1 reliable?
The price and inventory of AP9101CK-AITRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-AITRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-AITRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-AITRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-AITRG1?
AP9101CK-AITRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-AITRG1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP9101CK-AITRG1?
For technical support, including AP9101CK-AITRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-AITRG1 requirements.
6.How does Aetrix verify that AP9101CK-AITRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-AITRG1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP9101CK-AITRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-AITRG1?
All AP9101CK-AITRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-AITRG1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP9101CK-AITRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-AITRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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