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Diodes Incorporated AP9101CAK-ATTRG1
- Part No.:
- AP9101CAK-ATTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-ATTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,354
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Product details
Overview
AP9101CAK-ATTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.400V ±25mV, overdischarge detection at 2.800V ±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) pins in portable power tools, Bluetooth headsets, and medical wearables.
For engineers reviewing the AP9101CAK-ATTRG1 datasheet, AP9101CAK-ATTRG1 pinout, AP9101CAK-ATTRG1 application, or AP9101CAK-ATTRG1 equivalent, this device supports precise voltage monitoring across five protection thresholds, offers ultra-low 3.0µA operating current, integrates VM sense path with 30kΩ typical RVMS resistance, and delivers automotive-grade reliability with AEC-Q200-qualified variants available upon request.
Technical Context
The AP9101CAK-ATTRG1 implements independent analog comparators for VDD–VSS (cell voltage), VM–VSS (current-sense voltage), and VDD–VM (charger overvoltage), each feeding into logic-controlled delay timers and latch circuits. Its high-voltage CMOS process enables 30V VDD-to-VM tolerance, supporting direct connection to charger inputs without level-shifting.
Protection states are latched and released automatically: overcharge releases at 4.200V, overdischarge at 3.000V, and short-circuit conditions clear when VM drops near VSS due to internal RVMS pull-down. The device operates across –40°C to +85°C with guaranteed accuracy over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.400V ±25mV - triggers CO pin low after tCU delay to disable charge FET when cell exceeds safe voltage |
| Overdischarge Detection Voltage | 2.800V ±35mV - asserts DO pin low after tDL delay to halt discharge before deep depletion |
| Discharge Overcurrent Threshold | 0.150V ±15mV - detects >1.5A (with 100mΩ sense resistor) and disables DO within 14ms max |
| Operating Current | 3.0µA typ at 3.5V - enables multi-year runtime in always-on battery packs |
| VDD–VM Absolute Max | 30V - allows direct integration with 24V chargers without external clamping |
| 0V Battery Charge Function | Enabled - permits recovery of fully depleted cells using standard CC/CV chargers |
| Package | SOT26 - 6-pin thermally enhanced package with NC pin, compatible with automated SMT assembly |
Pinout & Package
SOT26 package: 6-pin, lead-free, RoHS-compliant surface-mount package with exposed thermal pad (not electrically connected). Pin 4 is NC; pin orientation follows standard top-view marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VM) | Current Sense Input | Monitors voltage drop across external sense resistor; connects internally to RVMS (30kΩ) during short-circuit state |
| 2 (VDD) | Positive Supply Input | Connects to battery positive; powers internal circuitry and drives CO/DO gate outputs |
| 3 (VSS) | Negative Supply Reference | System ground reference for all voltage comparators and logic blocks |
| 4 (NC) | No Connect | Unbonded pin; must remain floating per datasheet - no routing or soldering |
| 5 (DO) | Discharge Control Output | Drives gate of external N-MOSFET; high = discharge enabled, low = discharge disabled |
| 6 (CO) | Charge Control Output | Drives gate of external N-MOSFET; high = charge enabled, low = charge disabled |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Delay Timing | Internal RC-based timers eliminate need for external capacitors - reduces BOM count and layout area |
| High-Accuracy Voltage Detection | ±25mV overcharge detection tolerance ensures compliance with Li+ cell voltage limits across temperature |
| Selectably Enabled 0V Charging | Factory-configured option allows safe recharge of deeply discharged cells without manual intervention |
| Charger Overvoltage Protection | 8.0V ±2V detection on VDD–VM prevents damage from faulty or mismatched chargers |
| Ultra-Low Power-Down Mode | 0.01µA typ current draw extends shelf life of sealed battery packs during storage |
Applications
| Power Tool Battery Packs | Wireless Earbud Cases |
|---|---|
|
Use Scenario: 18V cordless drill battery pack with dual-MOSFET protection and USB-C fast charging. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage, discharge current, and charger input; executes sub-15ms overcurrent shutdown. Use Value: Prevents thermal runaway during stall events by cutting discharge at 0.150V sense threshold, enabling 20A peak current handling with 100mΩ Rsense. |
Use Scenario: Compact charging case for true wireless stereo earbuds with integrated 3.7V Li+ cell and Qi receiver. IC Role / Device Role / Timing Role: Single-chip protector managing charge enable/disable, overdischarge cutoff, and 0V recovery during long-term storage. Use Value: Enables automatic reactivation after months of shelf storage via 0V battery charge function, eliminating user "dead case" complaints. |
| Portable Medical Monitors | Smart Wearable Sensors |
|
Use Scenario: FDA-cleared handheld pulse oximeter with replaceable 1-cell Li+ battery and BLE telemetry. IC Role / Device Role / Timing Role: Safety-critical protector enforcing strict 2.800V/3.000V overdischarge window to preserve battery cycle life and data logging integrity. Use Value: Guarantees ≥500 cycles at 80% capacity retention by preventing voltage excursions beyond JEDEC JESD22-B117A limits. |
Use Scenario: Skin-contact ECG patch with 7-day runtime, motion-triggered sampling, and magnetic charging. IC Role / Device Role / Timing Role: Low-quiescent protector enabling <3µA system sleep current while maintaining real-time voltage surveillance. Use Value: Extends usable battery life by 22% versus discrete solutions due to 3.0µA operating current and auto-wake-up capability. |
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 VDD–VM overvoltage detection; requires external capacitor for delay timing | Lacks charger overvoltage protection and 0V charge function - unsuitable for unregulated charger environments | Choose only if cost sensitivity outweighs safety feature requirements and charger compatibility is guaranteed |
| Ricoh RP502K001B-TR-F | Supports 2-cell configuration; higher 5.0µA operating current; no selectable 0V charge option | Designed for multi-cell stacks - over-engineered and less accurate for single-cell use cases | Select only when future platform scalability to 2S is required; otherwise increases BOM cost unnecessarily |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, the AP9101CAK-ATTRG1 uniquely combines factory-programmed precision thresholds, integrated charger overvoltage guard, and 0V recovery in a space-constrained SOT26 footprint - delivering optimal safety and longevity for consumer 1S Li+ systems.
Availability
AP9101CAK-ATTRG1 is available at Aetrix Electronics and suitable for power tool battery packs, wireless earbud cases, and portable medical monitors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AP9101CAK-ATTRG1 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 devices, with design centers across Asia, Europe, and the U.S., and ISO/TS 16949-certified manufacturing facilities.
The AP9101C series belongs to Diodes' Battery Management Solutions product line, engineered specifically for compact, high-reliability protection of single-cell lithium-ion and lithium-polymer batteries in portable electronics.
FAQ
What is the function of the NC pin (Pin 4) in the SOT26 package?
Pin 4 is a no-connect terminal with no internal bond wire or circuit connection. It must remain unconnected on PCB layout and should not be tied to ground, VDD, or any other net. Soldering or routing to this pin may cause mechanical stress or unintended parasitic coupling, violating the device's qualification testing conditions.
Does AP9101CAK-ATTRG1 support automatic recovery from overdischarge without charger connection?
Yes - this variant includes the auto-wake-up function (denoted by 'A' in part number suffix). When battery voltage rises above 3.000V (VDU), the device exits overdischarge state and re-enables DO output without requiring external charger presence, enabling self-recovery in intermittently loaded systems like wearables.
How does the VM pin interface with the external sense resistor?
The VM pin connects directly to the source node of the discharge FET (or midpoint of dual-FET configuration). With a typical 100mΩ sense resistor, 0.150V at VM corresponds to 1.5A discharge current. Internal RVMS (30kΩ) pulls VM to VSS during short-circuit events, ensuring rapid DO deactivation and safe fault clearance.
Can AP9101CAK-ATTRG1 be used with 2-cell battery configurations?
No - it is strictly designed for 1-cell Li+ or Li-Po applications with VDD–VSS operating range of 1.5V to 5.5V. Applying stacked cell voltages exceeding 5.5V to VDD will violate absolute maximum ratings. For 2S designs, Diodes recommends the AP9211 or AP9221 families, which support up to 8.4V total pack voltage.
AP9101CAK-ATTRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-ATTRG1 FAQ
1.How can I place an order for AP9101CAK-ATTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-ATTRG1 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-ATTRG1 reliable?
The price and inventory of AP9101CAK-ATTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-ATTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-ATTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-ATTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-ATTRG1?
AP9101CAK-ATTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-ATTRG1 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-ATTRG1?
For technical support, including AP9101CAK-ATTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-ATTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-ATTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-ATTRG1 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-ATTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-ATTRG1?
All AP9101CAK-ATTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-ATTRG1, 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-ATTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-ATTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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