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Diodes Incorporated AP9101CAK-CITRG1
- Part No.:
- AP9101CAK-CITRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-CITRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,673
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Product details
Overview
AP9101CAK-CITRG1 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 0.095V ±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 AP9101CAK-CITRG1 datasheet, AP9101CAK-CITRG1 pinout, AP9101CAK-CITRG1 application, or AP9101CAK-CITRG1 equivalent, this page delivers verified functional parameters, SOT25 package mapping, real-world use cases in Li+ pack design, and validated alternative parts with documented voltage threshold and power-down mode differences.
Technical Context
The AP9101CAK-CITRG1 implements dual-path voltage monitoring: VDD–VSS for cell voltage (overcharge/overdischarge) and VM–VSS for current-sense voltage (discharge/charge overcurrent, short-circuit). Its logic circuit uses internal reference trimming to maintain ±25mV overcharge detection accuracy across –40°C to +85°C.
It integrates selectable power-down mode (enabled by default), 0V battery charge function (enabled), and auto-release overcharge protection. The built-in RVMD/RVMS resistive network enables automatic wake-up during overdischarge recovery without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - sets precise upper cell voltage limit before disabling charge FET |
| Overdischarge Detection Voltage | 2.500V ±35mV - prevents deep discharge damage to Li+ cell anode structure |
| Discharge Overcurrent Threshold | 0.095V ±15mV - corresponds to ~95mV across sense resistor for 10A load at 10mΩ Rsense |
| Operating Current (Typ) | 3.0µA at VDD=3.5V - enables >1-year shelf life in battery-powered IoT devices |
| Power-Down Current (Typ) | 0.01µA - reduces parasitic drain during long-term storage of unused packs |
| VM–VSS Input Range | –0.3V to 5.5V - supports bidirectional current sensing and reverse-polarity protection |
| CO/DO Output Drive | 6kΩ typical pull-up/pull-down resistance - directly drives standard N-MOSFET gates without buffer |
Pinout & Package
AP9101CAK-CITRG1 is housed in a RoHS-compliant, lead-free SOT25 (SC-74A) surface-mount package measuring 2.9mm × 1.6mm × 1.1mm, optimized for compact 1-cell battery modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 1) | Current-sense input | Monitors voltage drop across external sense resistor to detect charge/discharge overcurrent and short-circuit events |
| VDD (Pin 2) | Positive supply input | Connects to battery positive terminal; powers internal circuitry and provides reference for all voltage thresholds |
| VSS (Pin 3) | Negative supply ground | System ground reference for all analog comparators and logic; tied to battery negative |
| DO (Pin 4) | Discharge control output | Drives gate of discharge N-MOSFET; low = disable discharge path during overdischarge or overcurrent |
| CO (Pin 5) | Charge control output | Drives gate of charge N-MOSFET; low = disable charge path during overcharge, overvoltage charger, or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-time delay circuit | No external capacitor needed - eliminates BOM cost and layout area for timing components |
| Selectable 0V battery charge | Enabled per ordering code - allows safe recharge of deeply discharged cells down to 0V without manual reset |
| Overvoltage charger detection | 8.0V ±2V threshold - protects against faulty chargers delivering >6V to 1-cell Li+ systems |
| High-voltage CMOS process | 30V max VDD–VM rating - withstands transient spikes during hot-plug or load dump events |
| Auto-release overcharge mode | Re-enables charging when cell voltage drops below 4.175V - avoids permanent lockout after temporary overvoltage |
Applications
| Power Tools | Wireless Headsets |
|---|---|
|
Use Scenario: Cordless drill battery pack subjected to high-current bursts (>15A) and thermal cycling during repeated duty cycles. IC Role / Device Role / Timing Role: Protection IC monitoring cell voltage and VM–VSS differential to disable discharge FET within 10ms of overdischarge or short-circuit detection. Use Value: Prevents irreversible capacity loss from overdischarge and avoids MOSFET failure due to sustained overcurrent. |
Use Scenario: Compact earbud case battery managing trickle charge and standby discharge over multi-month shelf life. IC Role / Device Role / Timing Role: Low-power protector maintaining 0.01µA sleep current while enabling 0V charge recovery upon first connection to USB-C charger. Use Value: Eliminates user-reported "dead case" failures caused by self-discharge below 2.0V cutoff. |
| Medical Wearables | Smart Pens |
|
Use Scenario: FDA-regulated glucose monitor with sealed 1-cell Li+ battery requiring fail-safe shutdown under fault conditions. IC Role / Device Role / Timing Role: Safety-critical protector enforcing ±35mV overdischarge accuracy and auto-release behavior to avoid false lockouts during low-temperature operation. Use Value: Meets IEC 62368-1 secondary cell protection requirements without external supervision circuitry. |
Use Scenario: Digitally enabled stylus with micro-USB charging and 2-year shelf-life target. IC Role / Device Role / Timing Role: Integrated protector using built-in RVMS network to auto-wake from overdischarge state when user connects charger, eliminating manual reset button. Use Value: Reduces mechanical BOM count and improves first-use experience in consumer electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP9101CAB-TRG1 | Overcharge detection = 4.425V; overdischarge = 2.500V; same 0V charge and power-down enable | Higher VCu suits higher-voltage Li+ chemistries (e.g., LiCoO2 with 4.4V max) | Select when tighter top-end voltage margin is required without changing PCB layout |
| AP9101CAH-TRG1 | Discharge overcurrent threshold = 0.075V; charge overcurrent = –0.075V; same package and pinout | Lower VDOC enables use with 5mΩ sense resistors for high-current (>20A) applications | Choose for power tools or drones needing finer current resolution and lower conduction loss |
Compared with AP9101CAK-CITRG1, AB-TRG1 raises overcharge protection by 50mV for enhanced safety margin on high-capacity cells, while AH-TRG1 lowers overcurrent trip points by 20mV to support ultra-low-Rsense designs-both retain identical SOT25 footprint and firmware-compatible control logic.
Availability
AP9101CAK-CITRG1 is available at Aetrix Electronics and suitable for portable power tools, wireless audio accessories, medical wearables, and smart pens requiring stable component supply and long-term lifecycle support.
Supply support for AP9101CAK-CITRG1 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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with ISO/TS 16949-certified production facilities and broad distribution networks.
The AP9101C series belongs to Diodes' Battery Management IC product line, engineered specifically for cost-sensitive, space-constrained 1-cell Li+ protection with minimal external components and automotive-grade reliability testing.
FAQ
What is the function of the VM pin on AP9101CAK-CITRG1?
The VM pin serves as the current-sense input referenced to VSS, detecting voltage drops across an external sense resistor to identify discharge overcurrent, charge overcurrent, and short-circuit conditions. It operates over –0.3V to 5.5V and interfaces directly with the internal comparator network without signal conditioning.
Does AP9101CAK-CITRG1 support automatic recovery from overdischarge?
Yes - when configured with the factory-enabled 0V battery charge function (as indicated by 'C' in the part number suffix), the device automatically recovers from overdischarge upon charger connection or when battery voltage rises above 2.900V, using its internal RVMD/RVMS network to re-enable the DO output without external intervention.
Can AP9101CAK-CITRG1 be used in 2-cell battery packs?
No - the AP9101CAK-CITRG1 is designed exclusively for single-cell Li+ or Li-polymer batteries with maximum VDD–VSS operating range of 1.5V to 5.5V. For 2-cell applications, Diodes recommends the AP9211 or AP9221 series, which support up to 8.4V total pack voltage and dual-cell voltage monitoring.
What is the significance of the 'TRG1' suffix in AP9101CAK-CITRG1?
'TR' denotes tape-and-reel packaging format; 'G1' certifies full RoHS compliance and halogen/antimony-free "Green" construction per Diodes' specification, with bromine & chlorine <900ppm each and antimony <1000ppm - required for CE-marked consumer and medical products sold in EU markets.
AP9101CAK-CITRG1 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
AP9101CAK-CITRG1 FAQ
1.How can I place an order for AP9101CAK-CITRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-CITRG1 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 AP9101CAK-CITRG1 reliable?
The price and inventory of AP9101CAK-CITRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-CITRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-CITRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-CITRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-CITRG1?
AP9101CAK-CITRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-CITRG1 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 AP9101CAK-CITRG1?
For technical support, including AP9101CAK-CITRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-CITRG1 requirements.
6.How does Aetrix verify that AP9101CAK-CITRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-CITRG1 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 AP9101CAK-CITRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-CITRG1?
All AP9101CAK-CITRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-CITRG1, 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 AP9101CAK-CITRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-CITRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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