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Diodes Incorporated AP9101CK-AATRG1
- Part No.:
- AP9101CK-AATRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-AATRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,647
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Product details
Overview
AP9101CK-AATRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.375V ±25mV, overdischarge detection at 2.500V ±35mV, discharge overcurrent detection at 0.150V ±15mV, built-in fixed delay timing, and selectable 0V battery charge function. It controls external N-channel MOSFETs via DO (discharge gate) and CO (charge gate) to safeguard against voltage, current, and short-circuit faults in portable power systems.
For engineers reviewing the AP9101CK-AATRG1 datasheet, AP9101CK-AATRG1 pinout, AP9101CK-AATRG1 application, or AP9101CK-AATRG1 equivalent, this device supports precise cell-level protection in space-constrained battery management designs where ultra-low quiescent current (3.0µA typ), high-voltage tolerance (30V VDD–VM), and factory-configured voltage thresholds are critical selection criteria.
Technical Context
The AP9101CK-AATRG1 integrates independent voltage comparators for overcharge (VCU = 4.375V), overdischarge (VDL = 2.500V), and overvoltage charger (VOVCHG = 8.0V), each with configurable hysteresis and ±25–±100mV accuracy. Its logic circuit drives CO and DO outputs to disable external FETs upon fault detection, with fixed delay timers (tCU/tDL = ms-range, tSHORT = µs-range) ensuring robust noise immunity.
It employs internal high-impedance resistors (RVMD = 150–500kΩ, RVMS = 10–50kΩ) to sense VM–VSS differential voltage for current monitoring without external shunt calibration. The device operates across –40°C to +85°C with supply voltage from 1.5V to 5.5V and supports both power-down mode (0.01µA typ) and auto-wake-up variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - sets precise upper cell voltage limit before disabling charge path |
| Overdischarge Detection Voltage | 2.500V ±35mV - prevents deep discharge damage by cutting off discharge FET |
| Discharge Overcurrent Threshold | 0.150V ±15mV - detects excessive load current via VM–VSS sense voltage |
| Quiescent Current (Operation) | 3.0µA typ at VDD = 3.5V - enables multi-year battery shelf life in standby |
| VDD–VM Absolute Max Rating | 30V - supports high-voltage charger interface without external clamping |
| 0V Battery Charge Function | Factory-enabled - allows safe recharge of fully depleted cells without manual intervention |
| Package Type | SOT25 - 5-pin surface-mount package with 1.6mm × 2.9mm footprint for compact PCB layout |
Pinout & Package
SOT25 package: 5-pin, small-outline transistor with exposed pad (no thermal pad connection required); pin 1 marked, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current Sense Input | Monitors voltage drop across external sense resistor between P– and battery negative; enables overcurrent/short-circuit detection |
| VDD | Positive Supply Input | Connects to battery positive terminal; powers internal circuitry and provides reference for voltage detection |
| VSS | Negative Supply Reference | Ground reference for all internal comparators and logic; tied to battery negative |
| DO | Discharge Control Output | Drives gate of external discharge N-MOSFET; low output disables discharge path during overdischarge or overcurrent |
| CO | Charge Control Output | Drives gate of external charge N-MOSFET; low output disables charge path during overcharge, overvoltage charger, or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| Built-in Fixed Delay Timing | No external capacitors needed - eliminates BOM count and layout sensitivity for tCU/tDL/tDOC timing |
| High-Voltage CMOS Process | 30V VDD–VM rating - enables direct integration with high-voltage chargers without level-shifting or protection diodes |
| Selectably Enabled 0V Charge | Factory-programmed option - permits automatic recovery from zero-volt storage state without external wake-up circuitry |
| Ultra-Low Power-Down Mode | 0.01µA typical current - extends shelf life of sealed battery packs during long-term storage |
| Accurate Hysteresis Control | Programmable overcharge hysteresis (0.1–0.4V) - prevents oscillation near trip points during marginal voltage conditions |
Applications
| Power Tool Battery Packs | Wireless Headphone Charging Cases |
|---|---|
|
Use Scenario: Rechargeable 1-cell Li-ion pack powering cordless drills with high pulse discharge currents up to 20A. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage, VM-sense current, and charger overvoltage; asserts DO/CO within 10ms of fault detection. Use Value: Prevents thermal runaway during high-current discharge and ensures safe recharging after deep discharge events via 0V charge enable. |
Use Scenario: Compact 1-cell Li-polymer battery inside Bluetooth earbud charging case with tight space constraints. IC Role / Device Role / Timing Role: Single-chip voltage/current protector with SOT25 footprint; manages charge termination, overdischarge cutoff, and short-circuit shutdown. Use Value: Enables <2mm² PCB area for protection circuit while maintaining ±25mV overcharge accuracy and sub-µA quiescent draw for multi-month case standby. |
| Medical Portable Monitors | Rideable Scooter Battery Modules |
|
Use Scenario: Life-critical handheld diagnostic device requiring guaranteed battery safety compliance and long shelf life. IC Role / Device Role / Timing Role: Fault-detection engine enforcing IEC 62133 limits on overcharge (4.375V), overdischarge (2.500V), and short-circuit (<10µs response). Use Value: Meets medical-grade reliability with ±35mV overdischarge accuracy and 0.01µA power-down current to preserve battery charge during 2-year shelf storage. |
Use Scenario: 1-cell auxiliary battery powering lighting and display in shared e-scooters subject to frequent deep cycling and vibration. IC Role / Device Role / Timing Role: Robust protection unit with 30V VDD–VM tolerance handling regenerative braking transients and charger surges. Use Value: Eliminates need for external TVS/clamp diodes while providing fast short-circuit shutdown (tSHORT ≤ 1.2µs) to prevent connector arcing under fault. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Seiko Instruments S-8261AAB-M6T1U | Fixed 4.25V overcharge threshold; no 0V charge function; requires external capacitor for delay timing | Lacks factory-configurable thresholds and integrated 0V recovery - unsuitable for legacy battery refurbishment | Choose only if fixed 4.25V OCV and lower cost outweigh need for precision tuning and zero-volt restart capability |
| Ricoh RP502K001B-TR-F | Supports 2-cell configuration; higher 5.0µA operating current; no overvoltage charger detection circuit | Designed for multi-cell stacks - over-spec'd and less accurate for strict 1-cell 4.375V requirement | Select only when future design scalability to 2-cell topology is confirmed and 4.375V ±25mV accuracy is not mandatory |
Compared with S-8261AAB-M6T1U and RP502K001B-TR-F, the AP9101CK-AATRG1 delivers tighter voltage accuracy (±25mV vs ±50mV), eliminates external timing components, and uniquely supports factory-enabled 0V battery recovery - making it optimal for next-generation single-cell Li-ion packs demanding precision, miniaturization, and maintenance-free operation.
Availability
AP9101CK-AATRG1 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headphone charging cases, medical portable monitors, and rideable scooter battery modules requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AP9101CK-AATRG1 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 industrial, computing, and consumer markets.
The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for space-constrained, cost-sensitive 1-cell Li-ion/Li-polymer applications requiring high-accuracy voltage sensing, ultra-low power consumption, and minimal external component count.
FAQ
What is the function of the VM pin on the AP9101CK-AATRG1?
The VM pin serves as the current-sense input terminal, measuring the voltage difference between the battery's P– node and VSS to detect discharge overcurrent, charge overcurrent, and short-circuit conditions. It connects internally to high-impedance resistors (RVMD/RVMS) that bias the sense path, enabling accurate current monitoring without external amplification or calibration components.
Does the AP9101CK-AATRG1 support overvoltage protection for the charger input?
Yes - the AP9101CK-AATRG1 includes a dedicated overvoltage charger detection circuit that monitors the voltage between VDD and VM pins. When this voltage exceeds 8.0V (±2V), the CO pin is driven low to disable the charge FET; release occurs at 7.3V (±2V), with no delay applied to ensure immediate response to hazardous charger faults.
Can the AP9101CK-AATRG1 be used in 2-cell battery configurations?
No - the AP9101CK-AATRG1 is designed exclusively for 1-cell Li-ion/Li-polymer applications, with voltage detection ranges optimized for 2.0–4.5V cell operation. Its absolute maximum VDD–VSS rating is 12V, and its internal comparators lack the scaling or dual-threshold architecture required for reliable 2-cell stack monitoring.
How does the 0V battery charge function operate in the AP9101CK-AATRG1?
The 0V battery charge function is factory-enabled in the AP9101CK-AATRG1, allowing the IC to exit power-down mode and activate the charge path when a charger applies voltage to a fully depleted (0V) cell. This occurs once the charger raises the VDD voltage above 1.2V, bypassing the normal undervoltage lockout and enabling safe trickle recharge without external wake-up circuitry.
AP9101CK-AATRG1 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-AATRG1 FAQ
1.How can I place an order for AP9101CK-AATRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-AATRG1 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-AATRG1 reliable?
The price and inventory of AP9101CK-AATRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-AATRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-AATRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-AATRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-AATRG1?
AP9101CK-AATRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-AATRG1 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-AATRG1?
For technical support, including AP9101CK-AATRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-AATRG1 requirements.
6.How does Aetrix verify that AP9101CK-AATRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-AATRG1 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-AATRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-AATRG1?
All AP9101CK-AATRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-AATRG1, 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-AATRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-AATRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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