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Diodes Incorporated AP9101CK-BCTRG1
- Part No.:
- AP9101CK-BCTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-BCTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,837
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Product details
Overview
AP9101CK-BCTRG1 from Diodes Incorporated is a single-chip lithium-ion/polymer battery protection IC designed for 1-cell packs. It integrates overcharge (4.425 V), overdischarge (2.500 V), discharge overcurrent (0.150 V), short-circuit (0.700 V), and charge overcurrent (-0.150 V) detection with ±25 mV voltage accuracy and fixed internal delay timing. It drives external N-channel MOSFETs via dedicated CO and DO pins in portable power tools, Bluetooth headsets, and medical wearables.
For engineers reviewing the AP9101CK-BCTRG1 datasheet, AP9101CK-BCTRG1 pinout, AP9101CK-BCTRG1 application, or AP9101CK-BCTRG1 equivalent, this device supports selectable power-down mode, 0V battery charge function, and high-precision voltage thresholds critical for safe Li+ cell management in space-constrained consumer and industrial battery packs.
Technical Context
The AP9101CK-BCTRG1 implements independent analog comparators for six protection conditions-overcharge, overdischarge, discharge/charge overcurrent, short circuit, and overvoltage charger-with dedicated hysteresis and fixed delay timers (e.g., tCU = 1.0 s typ, tSHORT = 8 µs typ). Its logic circuit controls CO and DO outputs to gate external MOSFETs, while built-in RVMD/RVMS resistors enable VM-sense-based current monitoring without external components.
It operates across -40°C to +85°C with supply voltage from 1.5 V to 5.5 V and supports up to 30 V differential between VDD and VM pins. The device features two factory-configurable options: power-down mode (enabled) and 0V battery charge function (enabled), both confirmed in the ordering code "BCTRG1" per Diodes' DS37771 Rev. 8-3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.425 V ±25 mV - sets precise upper cell voltage limit before disabling charge path |
| Overdischarge Detection Voltage | 2.500 V ±35 mV - prevents deep discharge damage to Li+ anode structure |
| Discharge Overcurrent Threshold | 0.150 V ±15 mV - detects >1.5 A through 100 mΩ sense resistor at system level |
| Short-Circuit Detection Voltage | 0.700 V ±100 mV - triggers sub-10 µs shutdown for fault currents >7 A (100 mΩ) |
| Operating Current (Typ) | 3.0 µA at 3.5 V - enables multi-year shelf life in battery-powered IoT devices |
| Power-Down Current (Typ) | 0.01 µA - reduces standby drain during storage or transport |
| VDD–VM Absolute Max | 30 V - accommodates high-side charger sensing without external level shifters |
Pinout & Package
The AP9101CK-BCTRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 is marked; no NC pin is used in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current Sense Input | Monitors voltage drop across external sense resistor between P− and battery negative; enables discharge/charge overcurrent and short detection |
| VDD | Positive Supply Input | Connects to battery positive (cell anode); powers internal circuitry and drives CO/DO outputs |
| VSS | Negative Supply Reference | Ground reference for all internal comparators and logic; tied to battery negative (cell cathode) |
| DO | Discharge Control Output | Drives gate of external N-MOSFET in discharge path; low = disable discharge |
| CO | Charge Control Output | Drives gate of external N-MOSFET in charge path; low = disable charging |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Set Voltage Thresholds | Fixed 4.425 V overcharge / 2.500 V overdischarge with ±25 mV accuracy eliminates external resistor trimming |
| Integrated Delay Timing | Built-in fixed-time circuits eliminate external capacitors for tCU (1.0 s), tDL (100 ms), and tSHORT (8 µs) |
| Selectable Power-Down Mode | Enabled per "B" in ordering code - reduces quiescent current to 0.01 µA for long-term storage |
| 0V Battery Charge Function | Enabled per "C" in ordering code - allows recharge of fully depleted cells without manual wake-up |
| High-Voltage Sense Capability | 30 V VDD–VM rating supports direct connection to high-side charger rails without isolation components |
Applications
| Power Tools | Wireless Headsets |
|---|---|
Use Scenario: Cordless drill/driver with 1-cell Li+ pack subject to high pulse loads and thermal stress. IC Role / Device Role / Timing Role: Protection IC monitoring cell voltage and VM-sense current to disable charge/discharge paths within 8 µs during short-circuit events. Use Value: Prevents MOSFET failure and thermal runaway during accidental motor stall or output short. | Use Scenario: Compact Bluetooth earbuds requiring ultra-low standby current and reliable 0V recovery. IC Role / Device Role / Timing Role: Battery supervisor enabling automatic reactivation after full self-discharge using factory-enabled 0V charge function. Use Value: Eliminates user "bricking" of devices left unused for months; extends usable product lifetime. |
| Portable Medical Monitors | Smart Wearables |
Use Scenario: FDA-cleared glucose meter with single-cell Li+ battery used in clinical and home settings. IC Role / Device Role / Timing Role: Safety-critical protector enforcing ±35 mV overdischarge accuracy to preserve electrode integrity and calibration stability. Use Value: Ensures consistent measurement accuracy across battery life by preventing irreversible cathode degradation. | Use Scenario: Fitness tracker with tight PCB area budget and aggressive power budget targets. IC Role / Device Role / Timing Role: Integrated protection solution replacing discrete comparator + timer + logic design with 3.0 µA operating current. Use Value: Reduces BOM count by ≥7 components and saves >12 mm² PCB area versus discrete implementation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP9101CK-AATRG1 | Overcharge detection set to 4.375 V (50 mV lower); same 0V charge and power-down functions | Suitable for cells with tighter upper voltage tolerance (e.g., LCO chemistry) | Select when cell OCV curve requires earlier charge cutoff to extend cycle life |
| AP9101CK-AHTRG1 | Overcharge detection at 4.425 V (same), but discharge overcurrent threshold lowered to 0.075 V (vs. 0.150 V) | Enables higher current discharge (e.g., >3 A with 25 mΩ sense resistor) | Choose for high-power applications where faster overcurrent response at lower thresholds is required |
Compared with AP9101CK-BCTRG1, the AATRG1 variant offers reduced overcharge voltage for conservative cycling, while AHTRG1 lowers discharge overcurrent trip for higher load capability-both retain identical package, pinout, and feature set, enabling drop-in replacement with only threshold adjustment.
Availability
AP9101CK-BCTRG1 is available at Aetrix Electronics and suitable for portable power tools, wireless audio accessories, and portable medical monitors requiring stable component supply and long-term lifecycle support.
Supply support for AP9101CK-BCTRG1 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 for power management, signal integrity, and protection.
The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for cost-sensitive, space-constrained 1-cell Li+ applications demanding high voltage accuracy, ultra-low quiescent current, and integrated safety logic.
FAQ
What is the function of the VM pin on the AP9101CK-BCTRG1?
The VM pin serves as the current-sense input terminal, measuring voltage drop across an external sense resistor between the battery's P− node and system ground. It directly feeds analog comparators for discharge overcurrent, short-circuit, and charge overcurrent detection. Internal RVMS and RVMD resistors connect to VM during fault states to stabilize sensing and enable auto-release behavior without external components.
Does AP9101CK-BCTRG1 support overvoltage protection for the charger input?
Yes. The device includes a dedicated overvoltage charger detection circuit that monitors voltage between VDD and VM pins. When this exceeds 8.0 V (±2 V), it forces CO low to disable charging. Release occurs at 7.3 V (±2 V), with no delay applied-ensuring immediate response to unsafe charger conditions without compromising normal operation timing.
How does the "BCTRG1" suffix decode in the part number?
The suffix "BCTRG1" decodes as follows: "B" = power-down mode enabled; "C" = 0V battery charge function enabled; "T" = tape-and-reel packaging; "R" = standard reliability grade; "G1" = RoHS-compliant and halogen-free green construction. This configuration is confirmed in Diodes' DS37771 Rev. 8-3 ordering table for AP9101C variants.
Can AP9101CK-BCTRG1 be used with 2-cell or higher battery stacks?
No. The AP9101CK-BCTRG1 is explicitly designed for single-cell Li+ or Li-polymer batteries, with absolute maximum VDD–VSS rating of 12 V and operating range of 1.5 V to 5.5 V. Its voltage detection thresholds (e.g., 4.425 V overcharge) and internal logic assume 1-cell topology; use of this IC on multi-cell stacks would result in incorrect protection triggering and potential safety hazards.
AP9101CK-BCTRG1 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-BCTRG1 FAQ
1.How can I place an order for AP9101CK-BCTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-BCTRG1 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-BCTRG1 reliable?
The price and inventory of AP9101CK-BCTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-BCTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-BCTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-BCTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-BCTRG1?
AP9101CK-BCTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-BCTRG1 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-BCTRG1?
For technical support, including AP9101CK-BCTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-BCTRG1 requirements.
6.How does Aetrix verify that AP9101CK-BCTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-BCTRG1 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-BCTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-BCTRG1?
All AP9101CK-BCTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-BCTRG1, 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-BCTRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-BCTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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