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Diodes Incorporated AP9101CK-AOTRG1
- Part No.:
- AP9101CK-AOTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-AOTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,895
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Product details
Overview
AP9101CK-AOTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.425V ±25mV, overdischarge detection at 2.500V ±35mV, discharge overcurrent threshold of 0.064V ±15mV, short-circuit detection at 0.450V ±100mV, and integrated fixed-delay timing with no external capacitor required. It controls external N-channel MOSFETs via DO (discharge gate) and CO (charge gate) pins in portable power tools and Bluetooth headsets.
For engineers reviewing the AP9101CK-AOTRG1 datasheet, AP9101CK-AOTRG1 pinout, AP9101CK-AOTRG1 application, or AP9101CK-AOTRG1 equivalent, this device supports precise voltage monitoring across temperature (−40°C to +85°C), selectable 0V-charge function, auto-release overcharge mode, and high-voltage tolerance (30V VDD–VM), making it suitable for compact, low-power Li+ battery management systems requiring minimal BOM count.
Technical Context
The AP9101CK-AOTRG1 implements dual-path protection logic: CO pin controls charge MOSFET based on VDD–VSS voltage and VM–VSS current-sense differential, while DO pin independently manages discharge MOSFET using the same VM sense node and separate overdischarge/overcurrent thresholds. Its internal level-shifted logic enables direct drive of high-side charge FET and low-side discharge FET without external drivers.
It integrates factory-programmed voltage thresholds (VCU = 4.425V, VCL = 4.225V, VDL = 2.500V, VDU = 2.900V, VDOC = 0.064V, VSHORT = 0.450V, VCOC = −0.073V) and fixed overvoltage charger detection (VOVCHG = 8.0V, VOVCHGR = 7.3V) with zero delay. The device operates in either power-down mode (0.1µA standby) or auto-wake-up mode, both configurable at wafer level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.425V ±25mV - sets precise upper cell voltage limit before disabling charge path |
| Discharge Overcurrent Threshold | 0.064V ±15mV - detects >64mV drop across sense resistor to trigger DO shutdown |
| Short-Circuit Detection Voltage | 0.450V ±100mV - activates sub-µs DO cutoff when VM–VSS exceeds 450mV |
| Operating Supply Range | 1.5V to 5.5V between VDD and VSS - supports full Li+ cell voltage range during operation |
| VM–VDD Absolute Max | 30V - enables robust handling of transient charger spikes without clamping diodes |
| Quiescent Current | 3.0µA typ at +25°C - minimizes parasitic drain in always-connected battery packs |
| 0V Battery Charge Enable | Factory-enabled - allows safe recharge initiation even after deep self-discharge to 0V |
Pinout & Package
AP9101CK-AOTRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 marked; pinout identical for SOT25 and SOT26 variants per datasheet Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current-sense input | Monitors voltage drop across external sense resistor (R2) to detect charge/discharge overcurrent and short circuit |
| VDD | Positive supply input | Connects to battery positive; powers internal circuitry and drives CO/DO outputs |
| VSS | Negative supply reference | System ground reference for all voltage measurements and output logic levels |
| DO | Discharge control output | Drives gate of external N-MOSFET in discharge path; pulled low during overdischarge/overcurrent |
| CO | Charge control output | Drives gate of external N-MOSFET in charge path; pulled low during overcharge/charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| No external timing capacitors | Built-in fixed delay circuits eliminate need for external timing caps, reducing BOM and PCB area |
| High-accuracy voltage detection | ±25mV overcharge detection tolerance ensures tight cell voltage control without calibration |
| Low-power operation | 3.0µA typical operating current extends battery shelf life in storage and standby modes |
| 0V battery charge support | Enables recovery of deeply discharged cells without manual pre-charge intervention |
| 30V VM–VDD rating | Withstands high-voltage transients on charger input without external protection components |
Applications
| Power Tools | Wireless Headsets |
|---|---|
|
Use Scenario: Cordless drill battery pack with 1-cell Li+ configuration subjected to high-pulse discharge currents and intermittent charging. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage and VM-sensed current to disable charge/discharge paths within milliseconds of fault detection. Use Value: Prevents thermal runaway during stall events by cutting off discharge at 0.064V across 10mΩ sense resistor (6.4A), with <1µs short-circuit response. |
Use Scenario: Compact Bluetooth earbud case battery managing ultra-low quiescent current and frequent shallow cycling. IC Role / Device Role / Timing Role: Standby-optimized protector enabling 0.1µA power-down mode and automatic wake-up on voltage rise, eliminating manual reset switches. Use Value: Extends shelf life by limiting parasitic drain to 3µA during active use and 0.1µA in storage, preserving charge for >12 months. |
| Medical Wearables | Smart Pens |
|
Use Scenario: FDA-classified wearable glucose monitor with sealed 1-cell Li+ battery requiring fail-safe overvoltage and overtemperature coordination. IC Role / Device Role / Timing Role: Safety-critical voltage supervisor interfacing with host MCU via status flags derived from DO/CO states and internal hysteresis. Use Value: Guarantees compliance with IEC 62368-1 through ±25mV overcharge detection accuracy and 8.0V fixed overvoltage charger cutoff. |
Use Scenario: Rechargeable stylus with micro-USB charging and aggressive space constraints limiting external component count. IC Role / Device Role / Timing Role: Integrated protection solution replacing discrete comparators, timers, and MOSFET drivers in <2mm² footprint. Use Value: Reduces total protection BOM to just two external resistors (R1, R2) and one capacitor (C1), cutting bill-of-materials cost by 65% vs. discrete design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5460N258AA-TR | Fixed 2.5V overdischarge threshold only; no programmable VCU/VCL; 1.8µA operating current | Lacks 0V-charge enable and overvoltage charger detection; suited for cost-sensitive, fixed-threshold designs | Select if fixed 2.5V VDL suffices and overvoltage charger monitoring is unnecessary |
| SE9101B-2500F | Higher 5.0µA operating current; ±50mV overcharge accuracy; requires external timing capacitor | Needs additional 100nF timing cap and lacks 30V VM–VDD rating; better for legacy designs with existing cap footprints | Choose only when migrating from SE9101B-based platforms and timing cap layout is already defined |
Compared with R5460N258AA-TR and SE9101B-2500F, AP9101CK-AOTRG1 delivers tighter voltage tolerances, integrated overvoltage charger protection, and zero-capacitor timing-enabling smaller, safer, and more accurate 1-cell Li+ protection without design compromises.
Availability
AP9101CK-AOTRG1 is available at Aetrix Electronics and suitable for power tools, wireless headsets, medical wearables, and smart pens requiring stable component supply, long-term lifecycle assurance, and RoHS/Green compliance.
Supply support for AP9101CK-AOTRG1 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP9101C product line delivers highly integrated, factory-configurable battery protection ICs optimized for space-constrained, low-quiescent-current 1-cell Li+ applications where precision, safety, and BOM reduction are critical.
FAQ
What is the function of the VM pin on AP9101CK-AOTRG1?
The VM pin serves as the current-sense input terminal that measures the voltage difference between itself and VSS to detect discharge overcurrent, charge overcurrent, and short-circuit conditions. It connects directly to the source terminal of the discharge MOSFET and the drain terminal of the charge MOSFET via an external sense resistor (R2). Internal circuitry uses VM–VSS voltage to trigger DO or CO shutdown with programmable thresholds and fixed delay times.
Does AP9101CK-AOTRG1 support automatic recovery from overdischarge?
Yes - AP9101CK-AOTRG1 uses auto-release overcharge protection mode and supports automatic wake-up from overdischarge state. When the battery voltage rises above the overdischarge release voltage (VDU = 2.900V), the DO pin returns high to re-enable the discharge path without requiring external intervention or charger connection, provided the device is configured for auto-wake-up mode (as indicated by 'A' in the part number suffix).
Can AP9101CK-AOTRG1 be used with a 2-cell battery pack?
No - AP9101CK-AOTRG1 is specifically designed for 1-cell Li+ or Li-polymer battery protection. Its absolute maximum VDD–VSS rating is 12V, but its voltage detection thresholds (e.g., VCU = 4.425V, VDL = 2.500V) and functional architecture assume single-cell operation. For 2-cell packs, Diodes recommends the AP9211 or AP9221 series, which provide dual-cell voltage monitoring and balancing-ready interfaces.
How does the 0V battery charge function operate in AP9101CK-AOTRG1?
The 0V battery charge function is factory-enabled in AP9101CK-AOTRG1 and allows the charger to initiate charging even when the battery voltage has dropped to 0V due to self-discharge. This is achieved by internally biasing the CO driver to remain active below normal under-voltage lockout, permitting current flow once charger voltage exceeds 1.2V at the VDD pin - enabling safe recovery without manual pre-charge circuitry.
AP9101CK-AOTRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-AOTRG1 FAQ
1.How can I place an order for AP9101CK-AOTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-AOTRG1 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-AOTRG1 reliable?
The price and inventory of AP9101CK-AOTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-AOTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-AOTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-AOTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-AOTRG1?
AP9101CK-AOTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-AOTRG1 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-AOTRG1?
For technical support, including AP9101CK-AOTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-AOTRG1 requirements.
6.How does Aetrix verify that AP9101CK-AOTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-AOTRG1 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-AOTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-AOTRG1?
All AP9101CK-AOTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-AOTRG1, 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-AOTRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-AOTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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