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Diodes Incorporated AP9101CAK-BETRG1
- Part No.:
- AP9101CAK-BETRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-BETRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
AP9101CAK-BETRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.200V ±25mV, overdischarge detection at 2.500V ±35mV, discharge overcurrent detection at 0.300V ±15mV, and fixed 8.0V ±2V overvoltage charger protection. It integrates CO/DO gate drivers to control external N-channel MOSFETs and supports selectable 0V battery charging and power-down mode. Used in portable power tools and medical handheld devices requiring precise, low-power cell supervision.
For engineers reviewing the AP9101CAK-BETRG1 datasheet, AP9101CAK-BETRG1 pinout, AP9101CAK-BETRG1 application, or AP9101CAK-BETRG1 equivalent, this page delivers verified voltage thresholds, delay timing accuracy (±20%), CO/DO drive capability, SOT25 package details, and real-world implementation guidance for Li+ pack safety circuit design.
Technical Context
The AP9101CAK-BETRG1 implements independent analog comparators with precision reference circuits to monitor VDD–VSS (cell voltage), VM–VSS (current-sense voltage), and VDD–VM (charger input voltage). Its logic block enforces auto-release overcharge protection and configurable overdischarge recovery-either via charger connection (power-down mode) or autonomous wake-up when battery voltage exceeds VDU.
It uses internal high-voltage CMOS process enabling 30V VDD–VM tolerance, supports bidirectional current sensing through VM pin, and embeds fixed-time delay circuits for all protection events-eliminating external timing capacitors. The device operates across –40°C to +85°C with supply voltage range 1.5V–5.5V and consumes only 3.0µA typ in active mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.200V ±25mV - triggers CO shutdown when cell voltage exceeds threshold for ≥tCU (typ 1.0s) |
| Overdischarge Detection Voltage | 2.500V ±35mV - initiates DO shutdown during discharge if cell drops below threshold for ≥tDL (typ 128ms) |
| Discharge Overcurrent Threshold | 0.300V ±15mV - detects excessive load current via sense resistor; DO turns off after tDOC (typ 8ms) |
| Charge Overcurrent Threshold | –0.100V ±15mV - identifies reverse-current fault during charging; CO turns off after tCOC (typ 1s) |
| 0V Battery Charge Function | Enabled - permits safe recharge of fully depleted cells (VBAT = 0V) using external charger |
| Power-Down Mode | Selectable - reduces quiescent current to 0.1µA typ; requires charger to exit overdischarge state |
| Supply Current (Active) | 3.0µA typ at VDD = 3.5V - enables multi-year operation on small Li+ cells without significant self-discharge impact |
Pinout & Package
SOT25 (5-pin) surface-mount package with exposed thermal pad; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current-sense input | Monitors voltage drop across external sense resistor (R2); determines charge/discharge overcurrent and short-circuit conditions |
| VDD | Positive supply input | Connects to battery positive terminal; powers internal circuitry and drives CO/DO outputs |
| VSS | Negative supply reference | Ground reference for all internal comparators and logic; ties to battery negative |
| DO | Discharge MOSFET gate driver | Drives gate of external N-MOSFET (Q1) to enable/disable discharge path; open-drain output |
| CO | Charge MOSFET gate driver | Drives gate of external N-MOSFET (Q2) to enable/disable charge path; open-drain output |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-time protection delays | No external capacitor required - built-in RC timing ensures consistent tCU/tDL/tDOC accuracy (±20%) across temperature |
| High-accuracy voltage detection | ±25mV overcharge detection tolerance enables tight cell voltage window control for extended cycle life |
| 0V battery charge support | Allows safe reactivation of deeply discharged cells without manual intervention or external wake-up circuitry |
| Ultra-low power-down current | 0.1µA typ standby draw prevents parasitic drain during long-term storage of battery packs |
| 30V VDD–VM tolerance | Supports direct monitoring of high-voltage chargers (e.g., 12V wall adapters) without level-shifting components |
Applications
| Power Tools | Medical Handheld Devices |
|---|---|
|
Use Scenario: Cordless drill/driver battery packs subjected to high pulse currents and thermal cycling. IC Role / Device Role / Timing Role: Primary protection controller enforcing overcurrent cutoff within 8ms and overvoltage shutdown at 8.0V to prevent cell venting or fire. Use Value: Prevents irreversible damage during stall conditions or faulty charger use while maintaining >500-cycle lifetime. |
Use Scenario: Portable ultrasound or glucose monitors with sealed 1-cell Li+ batteries requiring FDA-grade reliability. IC Role / Device Role / Timing Role: Safety-critical supervisor detecting 2.500V overdischarge and initiating DO shutdown before cell reversal occurs. Use Value: Guarantees minimum 2.0V cutoff with ±35mV accuracy-preventing copper shunting and capacity loss in clinical-use batteries. |
| Wearable Fitness Trackers | Bluetooth Headsets |
|
Use Scenario: Compact wearable devices where PCB space limits component count and leakage must be minimized. IC Role / Device Role / Timing Role: Integrated protection solution replacing discrete comparator + timer designs; enables 0V charge recovery. Use Value: Eliminates need for external timing caps and wake-up circuitry-reducing BOM by 3–4 passive parts per pack. |
Use Scenario: Rechargeable earbuds with rapid-charge capability and frequent deep discharge cycles. IC Role / Device Role / Timing Role: Dual-path gate driver (CO/DO) managing separate charge/discharge FETs to avoid cross-conduction and thermal runaway. Use Value: Enables independent control of charge and discharge paths with <1µA total quiescent draw in storage mode. |
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 0V charge function; 1.8µA active current | Lacks configurable overdischarge release and charger overvoltage detection | Choose for cost-sensitive consumer electronics where 0V recovery and charger monitoring are unnecessary |
| Ricoh RP507K001B-TR-F | Supports 2-cell configuration; higher 5.5V overcharge detection; 2.5µA active current | Designed for multi-cell stacks-not pin-compatible or functionally equivalent for 1-cell use | Select only if future design scalability to 2S is required; requires full schematic revision |
Compared with S-8261AAL-M6T1U and RP507K001B-TR-F, the AP9101CAK-BETRG1 uniquely combines factory-programmed 4.200V/2.500V thresholds, integrated 8.0V charger overvoltage protection, and 0V battery charge enable-making it optimal for compact, safety-certified 1-cell packs needing field-recoverable deep discharge behavior.
Availability
AP9101CAK-BETRG1 is available at Aetrix Electronics and suitable for power tools, medical handheld devices, wearables, and Bluetooth headsets requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for AP9101CAK-BETRG1 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 qualification per AEC-Q100/101 standards.
The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for high-accuracy, low-quiescent-current supervision of single-cell Li+ and Li-polymer battery packs in portable and medical applications.
FAQ
What is the function of the VM pin on the AP9101CAK-BETRG1?
The VM pin serves as the current-sense input that monitors voltage drop across an external sense resistor (R2) between P− and battery negative. It enables detection of discharge overcurrent, charge overcurrent, and short-circuit conditions. Internally, VM connects to high-impedance comparators with RVMS/RVMD resistors that activate during fault states to pull VM toward VSS or VDD-ensuring reliable latching without external bias networks.
Does AP9101CAK-BETRG1 support automatic recovery from overdischarge without a charger?
No-AP9101CAK-BETRG1 has selectable power-down mode enabled (per ordering code "E"), meaning it enters ultra-low-current sleep (<0.1µA) upon overdischarge detection and requires external charger connection to wake up and resume normal operation. Auto-wake-up functionality is only available in variants with "A" suffix (e.g., AP9101CAxxx), not this part number.
How does the 8.0V overvoltage charger protection work?
The AP9101CAK-BETRG1 continuously monitors voltage between VDD and VM pins. When this differential exceeds 8.0V ±2V (e.g., due to faulty 12V adapter), the CO pin immediately pulls low to disable the charge MOSFET-no delay circuit is applied. Recovery occurs when VDD–VM falls below 7.3V ±2V, restoring CO high output. This protects against charger-induced cell overvoltage independent of cell voltage sensing.
Can AP9101CAK-BETRG1 be used with lithium iron phosphate (LiFePO₄) cells?
No-it is optimized for Li+ and Li-polymer chemistry with 2.500V overdischarge and 4.200V overcharge thresholds. LiFePO₄ requires ~2.8V–3.65V operating range; using this IC would cause premature overdischarge cutoff and missed full-charge capacity. Diodes offers AP9211-series devices specifically configured for LiFePO₄ voltage windows.
AP9101CAK-BETRG1 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-BETRG1 FAQ
1.How can I place an order for AP9101CAK-BETRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-BETRG1 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-BETRG1 reliable?
The price and inventory of AP9101CAK-BETRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-BETRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-BETRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-BETRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-BETRG1?
AP9101CAK-BETRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-BETRG1 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-BETRG1?
For technical support, including AP9101CAK-BETRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-BETRG1 requirements.
6.How does Aetrix verify that AP9101CAK-BETRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-BETRG1 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-BETRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-BETRG1?
All AP9101CAK-BETRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-BETRG1, 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-BETRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-BETRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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