My Inquiry
My Account
Diodes Incorporated AP9101CK-AJTRG1
- Part No.:
- AP9101CK-AJTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-AJTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP9101CK-AJTRG1 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 2.400V ±35mV, discharge overcurrent detection at 0.125V ±15mV, and integrated fixed-delay timing with no external capacitor required. It controls external N-channel MOSFETs via dedicated CO and DO gate drive pins in portable power tools, Bluetooth headsets, and medical wearables.
For engineers reviewing the AP9101CK-AJTRG1 datasheet, AP9101CK-AJTRG1 pinout, AP9101CK-AJTRG1 application, or AP9101CK-AJTRG1 equivalent, this device supports precise voltage thresholds, selectable 0V charge function, auto-release overcharge mode, and high-voltage VM-to-VDD tolerance up to 30V-critical for robust battery pack safety design under variable load and charger conditions.
Technical Context
The AP9101CK-AJTRG1 implements independent analog comparators for VDD–VSS (cell voltage) and VM–VSS (current-sense voltage), each feeding into logic-controlled delay timers with ±20% accuracy. Its internal level-shifting circuitry enables direct control of high-side charge and low-side discharge MOSFETs without external drivers.
It integrates dual resistance paths (RVMD/RVMS) that dynamically connect during fault states to pull VM toward VDD or VSS, enabling automatic recovery from overdischarge or short-circuit events. The device operates across –40°C to +85°C with supply voltage from 1.5V to 5.5V and supports factory-configured power-down mode or auto-wake-up behavior.
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 | 2.400V ±35mV - prevents deep discharge damage to Li+ cell anode structure |
| Discharge Overcurrent Threshold | 0.125V ±15mV - detects >1.25A current (with 100mΩ sense resistor) and disables DO within 14ms |
| VM–VDD Absolute Max Rating | 30V - allows direct connection to unregulated chargers or boost converters without clamping diodes |
| Operating Current (Typ) | 3.0µA at 3.5V - extends battery shelf life in storage by minimizing quiescent drain |
| 0V Battery Charge Support | Enabled - permits safe reactivation of fully depleted cells using standard CC/CV chargers |
| Package | SOT25 - 5-pin surface-mount package with 0.95mm pitch, compatible with automated PCB assembly |
Pinout & Package
SOT25 package: 5-pin, small-outline transistor outline with exposed thermal pad (not electrically connected); pin 1 marked with dot; JEDEC MO-178AA compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VM) | Current-sense input | Monitors voltage drop across external sense resistor between P− and battery negative; determines discharge/charge overcurrent and short-circuit status |
| 2 (VDD) | Positive supply input | Connects to battery positive terminal; powers internal circuitry and drives CO/DO outputs |
| 3 (VSS) | Negative supply reference | Direct connection to battery negative; serves as ground reference for all voltage comparators and logic |
| 4 (DO) | Discharge control output | Drives gate of external low-side N-MOSFET; pulls low to disable discharge path during overdischarge or overcurrent |
| 5 (CO) | Charge control output | Drives gate of external high-side N-MOSFET; pulls low to disable charge path during overcharge, overvoltage charger, or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| Fixed internal delay timers | Eliminates need for external RC networks-reduces BOM count and layout sensitivity to parasitic capacitance |
| Selectable 0V battery charge | Factory-enabled on AP9101CK-AJTRG1-allows recovery of deeply discharged cells without manual pre-charge circuits |
| Auto-release overcharge mode | Automatically restores charging when cell voltage drops below 4.175V, avoiding manual reset or power cycle |
| High-accuracy voltage detection | ±25mV overcharge threshold tolerance ensures consistent cell voltage clamping across temperature and unit variance |
| 30V VM–VDD rating | Supports integration with 12V or 24V auxiliary power inputs without level-shifting or protection diodes |
Applications
| Power Tools | Wireless Headsets |
|---|---|
Use Scenario: Cordless drill operating at peak load draws intermittent 15A pulses from 3.7V Li+ cell. IC Role / Device Role / Timing Role: AP9101CK-AJTRG1 monitors VM–VSS voltage to detect 0.125V threshold (1.25A with 100mΩ Rsense) and disables DO within 14ms to prevent MOSFET thermal runaway. Use Value: Prevents irreversible FET failure during stall conditions while maintaining full runtime under normal operation. | Use Scenario: Bluetooth earbud battery self-discharges to 0V during 6-month storage. IC Role / Device Role / Timing Role: Enables charger to initiate trickle charge at 1.2V due to factory-configured 0V battery charge function. Use Value: Restores functionality without requiring service center intervention or cell replacement. |
| Portable Medical Monitors | Smart Lock Batteries |
Use Scenario: ECG patch powered by 1-cell Li+ must retain calibration data during 2-week standby. IC Role / Device Role / Timing Role: Maintains 3.0µA typical operating current and supports auto-wake-up from overdischarge, eliminating need for mechanical reset switch. Use Value: Extends usable shelf life and ensures first-use reliability after long-term storage. | Use Scenario: Smart door lock experiences repeated short-circuit events from wet keypads or metal debris. IC Role / Device Role / Timing Role: Detects VM–VSS ≥0.700V (short-circuit) within 1.2µs and forces DO low to isolate battery from load. Use Value: Prevents catastrophic thermal events and preserves battery capacity across >10,000 actuation cycles. |
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-8261AAL-M6T1U | Fixed 4.25V overcharge threshold; no 0V charge support; requires external capacitor for delay timing | Lacks auto-wake-up and 0V recovery-requires manual reset after deep discharge | Choose only if fixed 4.25V OCV aligns with cell chemistry and system-level reset capability exists |
| Ricoh RP502K001B-TR-F | Supports 2-cell configuration; higher 5.0V overvoltage charger detection; 5.5µA operating current | Designed for multi-cell stacks; not pin-compatible; higher quiescent draw reduces shelf life | Use only when scaling to 2S architecture or requiring >8V charger monitoring margin |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, the AP9101CK-AJTRG1 uniquely combines factory-programmed 0V charge enable, auto-release overcharge, and capacitor-free timing in a 5-pin SOT25-making it optimal for compact, maintenance-free 1S consumer and medical battery packs.
Availability
AP9101CK-AJTRG1 is available at Aetrix Electronics and suitable for power tools, wireless audio devices, portable medical monitors, and smart lock batteries requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green manufacturing.
Supply support for AP9101CK-AJTRG1 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 ICs, with design centers in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.
The AP9101C product line delivers highly integrated, precision battery protection solutions for single-cell Li+ and Li-polymer packs-designed to reduce external component count, improve safety certification readiness, and accelerate time-to-market for portable electronics.
FAQ
What is the function of the VM pin on AP9101CK-AJTRG1?
The VM pin senses voltage between the battery's P− node and VSS to detect discharge/charge overcurrent and short-circuit conditions. During overdischarge, RVMD connects VM to VDD to enable wake-up; during short-circuit, RVMS connects VM to VSS to force automatic recovery when load is removed. It is not a power supply pin but a high-impedance analog input referenced to VSS.
Does AP9101CK-AJTRG1 support both charge and discharge MOSFET control?
Yes. The CO pin controls the gate of an external high-side N-channel MOSFET for charge path switching, while the DO pin controls a low-side N-channel MOSFET for discharge path switching. Both outputs drive to VDD (high) in normal operation and pull low to disable their respective FETs during protection events.
Can AP9101CK-AJTRG1 be used with a 2-cell battery pack?
No. AP9101CK-AJTRG1 is specified for 1-cell Li+ or Li-polymer batteries only, with absolute maximum VDD–VSS rating of 12V and overcharge detection range up to 4.5V. For 2-cell applications, Diodes offers the AP9211 series, which supports up to 8.4V total pack voltage and dual-cell voltage monitoring.
How does the overvoltage charger detection feature work on this part?
The overvoltage charger detection monitors voltage between VDD and VM pins. When it exceeds 8.0V (±2V), the CO pin immediately goes low to disable charging-no delay timer applies. Recovery occurs when voltage falls below 7.3V (±2V). This protects against faulty or mismatched chargers without affecting normal 4.2V–5V USB/DC charging operation.
AP9101CK-AJTRG1 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-AJTRG1 FAQ
1.How can I place an order for AP9101CK-AJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-AJTRG1 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-AJTRG1 reliable?
The price and inventory of AP9101CK-AJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-AJTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-AJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-AJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-AJTRG1?
AP9101CK-AJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-AJTRG1 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-AJTRG1?
For technical support, including AP9101CK-AJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-AJTRG1 requirements.
6.How does Aetrix verify that AP9101CK-AJTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-AJTRG1 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-AJTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-AJTRG1?
All AP9101CK-AJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-AJTRG1, 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-AJTRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-AJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP9101CK-AJTRG1 Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
