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Diodes Incorporated AP9101CAK-AHTRG1
- Part No.:
- AP9101CAK-AHTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-AHTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,957
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Product details
Overview
AP9101CAK-AHTRG1 from Diodes Incorporated is a single-chip lithium-ion/polymer battery protection IC designed for 1-cell packs. It provides overcharge (4.425 V ±25 mV), overdischarge (2.500 V ±35 mV), discharge overcurrent (75 mV ±15 mV), charge overcurrent (−75 mV ±15 mV), short-circuit (700 mV ±100 mV), and overvoltage charger (8.0 V ±2 V) protection with fixed delay timing, enabling compact, low-component-count battery management in portable power tools and medical devices.
For engineers reviewing the AP9101CAK-AHTRG1 datasheet, AP9101CAK-AHTRG1 pinout, AP9101CAK-AHTRG1 application, or AP9101CAK-AHTRG1 equivalent, this page delivers verified voltage thresholds, MOSFET gate control logic, SOT25 package details, and real-world use cases for Li+ pack safety design-without requiring external capacitors for timing.
Technical Context
The AP9101CAK-AHTRG1 integrates high-precision analog comparators with built-in fixed-time delay circuits to detect six fault conditions: overcharge, overdischarge, discharge/charge overcurrent, short circuit, and overvoltage charger events. Its VM pin monitors current-sense voltage across an external sense resistor while VDD–VSS tracks cell voltage directly.
It drives external N-channel MOSFETs via DO (discharge control) and CO (charge control) pins using CMOS-level outputs with 2–10 kΩ on-resistance. The device supports selectable power-down mode and factory-configured 0V battery charge functionality, operating across −40°C to +85°C with supply voltage from 1.5 V to 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.425 V ±25 mV at +25°C - sets precise upper cell voltage limit before disabling charge path |
| Overdischarge Detection Voltage | 2.500 V ±35 mV at +25°C - prevents deep discharge damage to Li+ cell anode structure |
| Discharge Overcurrent Threshold | 75 mV ±15 mV - enables accurate current limiting using low-value sense resistor (e.g., 5 mΩ @ 15 A) |
| Charge Overcurrent Threshold | −75 mV ±15 mV - detects reverse current flow during faulty charging, triggering CO shutdown |
| Short-Circuit Detection Voltage | 700 mV ±100 mV - triggers sub-µs DO shutdown for hard shorts, minimizing energy dissipation |
| Operating Current (Typ) | 3.0 µA at VDD = 3.5 V - extends battery shelf life in storage without compromising responsiveness |
| VM–VSS Input Range | −0.3 V to 5.5 V - accommodates bidirectional current sensing and negative transients during load dump |
Pinout & Package
AP9101CAK-AHTRG1 is housed in a RoHS-compliant, lead-free SOT25 (SC-74A) surface-mount package measuring 2.9 mm × 1.6 mm × 1.1 mm, optimized for space-constrained battery pack PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 1) | Current Sense Input | Monitors voltage drop across external sense resistor between P− and battery cathode; supports bidirectional current detection |
| VDD (Pin 2) | Positive Supply Input | Connects to battery anode (cell+) to power internal circuitry; rated up to 12 V absolute max |
| VSS (Pin 3) | Negative Supply Reference | System ground reference for all internal comparators and logic; tied to battery cathode (cell−) |
| DO (Pin 4) | Discharge Control Output | Drives gate of external discharge MOSFET (Q1); low output disables discharge path during faults |
| CO (Pin 5) | Charge Control Output | Drives gate of external charge MOSFET (Q2); low output disables charge path during overvoltage or overcurrent events |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-Time Protection Delay | Eliminates need for external timing capacitors-reduces BOM count and layout area in compact battery modules |
| 0V Battery Charge Enable | Factory-configured option allows safe reactivation of deeply discharged cells (0 V) via external charger, preventing permanent capacity loss |
| Selectable Power-Down Mode | Reduces quiescent current to 0.1 µA typical, extending shelf life for long-storage applications like emergency medical devices |
| High-Voltage VM Pin | Withstands up to 30 V differential between VDD and VM-enables robust operation during charger plug-in transients or load dump events |
| Auto-Release Overcharge Mode | Automatically restores charge path when cell voltage falls below 4.225 V, eliminating manual reset requirement in consumer products |
Applications
| Power Tools | Portable Medical Monitors |
|---|---|
Use Scenario: Cordless drill/driver battery packs subject to high-current pulses and thermal stress during motor stall. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage and discharge current in real time; initiates DO shutdown within 1.2 ms of overcurrent detection. Use Value: Prevents MOSFET thermal runaway and cell venting by enforcing strict 75 mV discharge overcurrent threshold with ±15 mV accuracy. | Use Scenario: Rechargeable battery in handheld ECG or pulse oximeter used in field deployments with infrequent charging cycles. IC Role / Device Role / Timing Role: Ensures safe 0V recovery and ultra-low-power storage mode; enters 0.1 µA power-down state after overdischarge. Use Value: Enables reliable reactivation after months of storage without user intervention, leveraging factory-enabled 0V charge function. |
| Wireless Headphones | Ruggedized Tablets |
Use Scenario: Compact Li+ battery in premium ANC headphones requiring minimal footprint and zero false trips during audio transients. IC Role / Device Role / Timing Role: Dual-path protection supervisor-uses CO to block charging above 4.425 V and DO to halt discharging below 2.500 V. Use Value: Maintains tight voltage windows (±25 mV overcharge, ±35 mV overdischarge) to preserve cycle life beyond 500 charges. | Use Scenario: Industrial tablet with hot-swappable battery exposed to vibration, ESD, and wide ambient temperature swings (−30°C to +70°C). IC Role / Device Role / Timing Role: Fault-tolerant protector with 30 V VM–VDD rating and −40°C to +85°C operation; handles charger plug-in surges. Use Value: Survives repeated 2 kV HBM ESD events and maintains ±100 mV short-circuit detection accuracy across full temperature range. |
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 4.25 V overcharge threshold; no overvoltage charger detection; requires external timing capacitor | Lacks 8.0 V overvoltage charger monitoring and 0V charge enable; suited only for basic protection without charger supervision | Select if cost-sensitive design accepts reduced fault coverage and higher BOM count |
| Ricoh RP502K001B-TR-F | Supports 2-cell configuration; higher 5.0 V overcharge threshold; no selectable power-down mode | Designed for multi-cell stacks; lacks ultra-low 0.1 µA sleep current needed for long-term storage | Choose only for 2S battery systems where single-cell precision and low quiescent current are secondary |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, AP9101CAK-AHTRG1 uniquely combines factory-programmed 0V charge, overvoltage charger detection, and capacitor-free timing in a single SOT25 package-making it optimal for space- and safety-critical 1S Li+ applications demanding full fault coverage and minimal external components.
Availability
AP9101CAK-AHTRG1 is available at Aetrix Electronics and suitable for power tools, portable medical monitors, wireless headphones, and ruggedized tablets requiring stable component supply, long-term lifecycle support, and guaranteed green/RoHS compliance.
Supply support for AP9101CAK-AHTRG1 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 applications.
The AP9101C product line delivers integrated battery protection ICs targeting compact, high-reliability 1-cell Li+ systems-designed specifically for portable electronics where size, accuracy, and ultra-low power consumption are critical.
FAQ
What is the function of the VM pin on AP9101CAK-AHTRG1?
The VM pin serves as the current-sense input terminal, measuring voltage drop across an external sense resistor placed between the battery cathode and system ground. It enables bidirectional current monitoring-detecting both discharge overcurrent (positive VM–VSS) and charge overcurrent (negative VM–VSS)-with a specified input range of −0.3 V to 5.5 V and internal resistance of 10–30 kΩ to VSS.
Does AP9101CAK-AHTRG1 support automatic recovery from overdischarge?
Yes-AP9101CAK-AHTRG1 supports auto-wake-up from overdischarge status. When the battery voltage rises above the overdischarge release voltage (2.900 V ±65 mV), the device automatically restores normal operation without requiring external intervention. This behavior is enabled by its factory-configured auto-wake-up mode, distinct from power-down variants that require charger connection to exit overdischarge.
Can AP9101CAK-AHTRG1 protect against charger overvoltage events?
Yes-the device includes a dedicated overvoltage charger detection circuit monitoring voltage between VDD and VM pins. When this differential exceeds 8.0 V (±2 V), the CO pin is driven low to disable the charge MOSFET immediately, with no delay. Recovery occurs when the voltage drops below 7.3 V (±2 V), restoring charge capability without hysteresis delay.
What package type is used for AP9101CAK-AHTRG1, and is it RoHS compliant?
AP9101CAK-AHTRG1 uses the SOT25 (SC-74A) package-a 5-pin, lead-free, RoHS-compliant surface-mount outline measuring 2.9 mm × 1.6 mm × 1.1 mm. It meets EU Directive 2015/863/EU (RoHS 3), contains <900 ppm bromine and chlorine combined, and is halogen- and antimony-free per Diodes Incorporated's "Green" definition.
AP9101CAK-AHTRG1 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-AHTRG1 FAQ
1.How can I place an order for AP9101CAK-AHTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-AHTRG1 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-AHTRG1 reliable?
The price and inventory of AP9101CAK-AHTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-AHTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-AHTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-AHTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-AHTRG1?
AP9101CAK-AHTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-AHTRG1 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-AHTRG1?
For technical support, including AP9101CAK-AHTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-AHTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-AHTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-AHTRG1 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-AHTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-AHTRG1?
All AP9101CAK-AHTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-AHTRG1, 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-AHTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-AHTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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