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Diodes Incorporated AP9101CAK-AJTRG1
- Part No.:
- AP9101CAK-AJTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-AJTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
AP9101CAK-AJTRG1 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 2.400V ±35mV, discharge overcurrent detection at 0.125V ±15mV, and integrated 0V battery charge enablement. It operates with 3.0µA typical current in active mode and supports SOT25 packaging for compact battery management in portable power tools and medical devices.
For engineers reviewing the AP9101CAK-AJTRG1 datasheet, AP9101CAK-AJTRG1 pinout, AP9101CAK-AJTRG1 application, or AP9101CAK-AJTRG1 equivalent, this device delivers factory-configured voltage thresholds, selectable power-down mode, fixed delay timing, high-voltage VM pin tolerance (up to 30V), and RoHS-compliant green packaging - all critical for BMS reliability in consumer and industrial Li+ systems.
Technical Context
The AP9101CAK-AJTRG1 implements independent analog comparators for overcharge (VCU = 4.375V), overdischarge (VDL = 2.400V), discharge overcurrent (VDOC = 0.125V), and short-circuit (VSHORT = 0.700V), each with dedicated delay timers (tCU/tDL/tDOC/tSHORT) and hysteresis control. Its logic circuit drives CO and DO gate outputs directly to external N-channel MOSFETs without external capacitors.
It integrates internal resistors RVMD (300kΩ typ) and RVMS (30kΩ typ) for VM-sense biasing, supports 0V battery charging via factory-set V0CHA = 1.2V threshold, and includes overvoltage charger detection (VOVCHG = 8.0V) with immediate CO shutdown - all operating across -40°C to +85°C with VDD supply from 1.5V to 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - sets precise upper cell voltage limit before CO disables charge path |
| Overdischarge Detection Voltage | 2.400V ±35mV - triggers DO shutdown to prevent deep discharge damage to Li+ cell |
| Discharge Overcurrent Threshold | 0.125V ±15mV - detects excessive load current via sense resistor voltage drop at VM pin |
| 0V Battery Charge Enable | V0CHA = 1.2V - allows safe reactivation of fully depleted cells using external charger |
| VM Pin Voltage Range | -0.3V to 30V - enables direct connection to battery pack negative terminal with high-side sensing capability |
| Operating Current (Active) | 3.0µA typ at VDD = 3.5V - minimizes parasitic drain during normal battery operation |
| Power-Down Current | 0.01µA typ - extends shelf life when battery is disconnected or in storage |
Pinout & Package
AP9101CAK-AJTRG1 is housed in a lead-free, RoHS-compliant SOT25 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained battery pack PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 1) | Charger Negative Input / Current Sense Node | Monitors voltage drop across external sense resistor to detect charge/discharge overcurrent and short-circuit events |
| VDD (Pin 2) | Positive Power Input | Supplies IC core logic from battery positive; accepts 1.5–5.5V range with internal regulation |
| VSS (Pin 3) | Negative Power Input / Ground Reference | Provides common return path for VDD, DO, CO, and internal comparators |
| DO (Pin 4) | Discharge FET Gate Control Output | Drives high-side or low-side N-MOSFET gate to interrupt discharge path during overdischarge or overcurrent |
| CO (Pin 5) | Charge FET Gate Control Output | Drives N-MOSFET gate to disable charging during overcharge, overvoltage, or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-time protection delay circuitry | Eliminates need for external timing capacitors - reduces BOM count and layout area |
| Selectably enabled 0V battery charge function | Factory-set V0CHA = 1.2V permits recovery of deeply discharged cells without manual intervention |
| High-accuracy voltage detection | ±25mV overcharge and ±35mV overdischarge thresholds ensure tight cell voltage control per JEITA standards |
| Integrated VM bias resistors | RVMD = 300kΩ and RVMS = 30kΩ provide stable sense-node referencing without external components |
| Overvoltage charger detection | 8.0V ±2V trigger on VDD–VM prevents damage from faulty or mismatched chargers |
Applications
| Power Tool Battery Packs | Medical Portable Monitors |
|---|---|
|
Use Scenario: Rechargeable 1-cell Li+ packs powering cordless drills and impact drivers subject to high pulse currents and thermal stress. IC Role / Device Role / Timing Role: Protection IC monitoring cell voltage, VM-sense current, and charger input to autonomously disable charge/discharge paths. Use Value: Prevents thermal runaway during high-current discharge and ensures safe recharging after deep discharge due to V0CHA = 1.2V support. |
Use Scenario: Compact, long-life battery packs in handheld ECG or pulse oximeter devices requiring ultra-low standby current. IC Role / Device Role / Timing Role: Low-power protection controller maintaining <0.01µA shutdown current while retaining fast overdischarge response (tDL = 16ms typ). Use Value: Extends shelf life and operational runtime by minimizing quiescent drain without compromising safety thresholds. |
| Wireless Headphone Charging Cases | IoT Sensor Node Batteries |
|
Use Scenario: Small-form-factor 1-cell Li+ cases that recharge earbuds and must survive repeated 0V cycling during user storage. IC Role / Device Role / Timing Role: Battery protector enabling automatic 0V recovery and preventing false overdischarge lockout during intermittent use. Use Value: Eliminates end-user "dead case" complaints by permitting recharge even after months of zero-voltage storage. |
Use Scenario: Remote environmental sensors powered by coin-cell-sized 1-cell Li+ batteries deployed in unattended locations for >2 years. IC Role / Device Role / Timing Role: Precision voltage supervisor with ±25mV overcharge accuracy and built-in hysteresis to avoid oscillation near threshold. Use Value: Guarantees consistent cell longevity by enforcing strict JEITA-aligned charge termination and cut-off voltages. |
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 0V charge enable; requires external timing capacitor | Lacks factory-programmed V0CHA and integrated delay circuit - needs additional passive components | Choose only if fixed 4.25V OCV and lower cost outweigh need for 0V recovery and component reduction |
| Ricoh RP502K001B-TR-F | 2.7V overdischarge threshold (vs. 2.4V); no overvoltage charger detection; 0.5µA power-down current | Higher VDL limits usable capacity in low-voltage cutoff designs; missing VOVCHG safety layer | Select when system tolerates reduced depth-of-discharge and charger compatibility is guaranteed |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, AP9101CAK-AJTRG1 provides tighter voltage accuracy, eliminates external timing components, enables 0V recovery, and adds overvoltage charger protection - making it superior for compact, high-reliability 1-cell Li+ systems where BOM simplification and safety robustness are prioritized.
Availability
AP9101CAK-AJTRG1 is available at Aetrix Electronics and suitable for power tool battery packs, medical portable monitors, wireless headphone charging cases, and IoT sensor node batteries requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green manufacturing.
Supply support for AP9101CAK-AJTRG1 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 ICs, with design centers across Asia, Europe, and the U.S., and manufacturing in IATF 16949-certified facilities.
The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for high-accuracy, low-quiescent-current monitoring and MOSFET control in single-cell lithium-ion and lithium-polymer battery packs.
FAQ
What is the function of the VM pin on AP9101CAK-AJTRG1?
The VM pin serves as the current-sense input node for detecting discharge overcurrent, charge overcurrent, and short-circuit conditions. It measures voltage drop across an external sense resistor between battery negative and P−, and internally connects to RVMD (300kΩ) and RVMS (30kΩ) for biasing. Its absolute rating allows up to 30V differential versus VDD, supporting high-side sensing configurations.
Does AP9101CAK-AJTRG1 support automatic recovery from overdischarge without a charger?
No - AP9101CAK-AJTRG1 uses the power-down mode variant (indicated by blank suffix in ordering code), requiring charger connection to exit overdischarge status. Unlike the auto-wake-up version (e.g., AP9101CA), it does not monitor rising battery voltage in sleep mode and remains latched until VDD is re-applied via charging.
How is overvoltage charger protection implemented in this device?
Overvoltage charger protection activates when the voltage between VDD and VM exceeds 8.0V ±2V (VOVCHG), causing immediate CO pin low-level assertion to disable the charge MOSFET. Release occurs when VDD–VM falls below 7.3V ±2V (VOVCHGR), with no intentional delay - providing instantaneous response to faulty or mismatched chargers.
Can AP9101CAK-AJTRG1 be used with lithium iron phosphate (LiFePO₄) cells?
No - AP9101CAK-AJTRG1 is configured for Li+ chemistry with 2.400V overdischarge and 4.375V overcharge thresholds, which fall outside typical LiFePO₄ ranges (2.5–3.65V). Using it with LiFePO₄ would cause premature overdischarge cutoff or insufficient overcharge protection, risking cell damage or safety failure.
AP9101CAK-AJTRG1 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-AJTRG1 FAQ
1.How can I place an order for AP9101CAK-AJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-AJTRG1 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-AJTRG1 reliable?
The price and inventory of AP9101CAK-AJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-AJTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-AJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-AJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-AJTRG1?
AP9101CAK-AJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-AJTRG1 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-AJTRG1?
For technical support, including AP9101CAK-AJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-AJTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-AJTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-AJTRG1 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-AJTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-AJTRG1?
All AP9101CAK-AJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-AJTRG1, 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-AJTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-AJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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