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Diodes Incorporated AP9101CK-AFTRG1
- Part No.:
- AP9101CK-AFTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-AFTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,887
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Product details
Overview
AP9101CK-AFTRG1 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 2.500V ±35mV, discharge overcurrent detection at 0.180V ±15mV, built-in fixed delay timing, and selectable 0V charge function. It operates in SOT25 package with VM/VDD/VSS/DO/CO pinout and supports battery pack safety in portable power tools and medical devices.
For engineers reviewing the AP9101CK-AFTRG1 datasheet, AP9101CK-AFTRG1 pinout, AP9101CK-AFTRG1 application, or AP9101CK-AFTRG1 equivalent, this page delivers verified functional parameters, real-world protection thresholds, MOSFET gate drive behavior, thermal and voltage operating limits, and direct substitution guidance - all confirmed from Diodes' official DS37771 Rev. 8-3 datasheet.
Technical Context
The AP9101CK-AFTRG1 integrates high-precision analog comparators for five independent fault conditions: overcharge (VCU = 4.375V), overdischarge (VDL = 2.500V), discharge overcurrent (VDOC = 0.180V), short-circuit (VSHORT = 0.700V), and charge overcurrent (VCOC = −0.180V). Its internal logic uses fixed delay timers (tCU/tDL/tDOC = typ. 1s/100ms/10ms) with ±20% accuracy across −40°C to +85°C.
It implements dual-path sensing via VM pin (monitors current-sense resistor voltage drop between P− and battery negative), while VDD–VSS measures cell voltage directly. The CO and DO outputs drive external N-channel MOSFET gates with RCOH/RCOL ≤10kΩ and RDOH/RDOL ≤10kΩ, enabling fast turn-off during faults without external drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - triggers CO pin low after 1s delay to disable charging when cell exceeds safe voltage |
| Overdischarge Detection Voltage | 2.500V ±35mV - asserts DO pin low after 100ms delay to halt discharge before deep depletion |
| Discharge Overcurrent Threshold | 0.180V ±15mV - detects excessive load current via sense resistor; initiates DO shutdown in 10ms |
| Short-Circuit Detection Voltage | 0.700V ±100mV - responds within 1µs to catastrophic VM–VSS shorts, forcing immediate DO off |
| Operating Supply Range | 1.5V–5.5V (VDD–VSS) - supports full functionality down to partially discharged cells |
| VM–VDD Absolute Max | 30V - enables robust operation under charger transients or reverse-polarity events |
| Quiescent Current | 3.0µA typ. in active mode; 0.01µA typ. in power-down - extends shelf life of sealed battery packs |
Pinout & Package
SOT25 surface-mount package (2.9mm × 2.8mm × 1.3mm), lead-free and RoHS/Green compliant, rated for −40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 1) | Current-sense input | Monitors voltage drop across external sense resistor (R2) between P− and battery negative; enables overcurrent and short-circuit detection |
| VDD (Pin 2) | Positive supply input | Connects to battery positive terminal; powers internal circuitry and defines reference for all voltage thresholds |
| VSS (Pin 3) | Negative supply reference | Connects to battery negative; serves as ground reference for VDD, VM, DO, and CO logic levels |
| DO (Pin 4) | Discharge control output | Drives gate of discharge-side N-MOSFET; high = on, low = off; RDOH/RDOL ≤10kΩ ensures reliable FET switching |
| CO (Pin 5) | Charge control output | Drives gate of charge-side N-MOSFET; high = on, low = off; RCOH/RCOL ≤10kΩ supports fast charge cutoff |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-time protection delays | No external capacitors required; tCU = 1s, tDL = 100ms, tDOC = 10ms, tSHORT = 1µs - reduces BOM count and layout area |
| Selectably enabled 0V battery charge | Factory-configured "Permission" mode allows recharge of fully depleted cells (0V) using standard chargers |
| Overvoltage charger detection | 8.0V ±2V threshold (VOVCHG) with instantaneous CO shutdown - protects against faulty or mismatched chargers |
| Power-down mode option | 0.01µA standby current; activated by floating VM pin; requires charger connection to wake - ideal for long-term storage |
| High-voltage CMOS process | 30V rating between VDD and VM pins - withstands surge events and reverse-connection stress without latch-up |
Applications
| Power Tools | Medical Wearables |
|---|---|
|
Use Scenario: Cordless drill battery pack subjected to high-current bursts and thermal cycling during repeated use. IC Role / Device Role / Timing Role: AP9101CK-AFTRG1 monitors cell voltage and discharge current in real time, asserting DO within 10ms if VSENSE ≥ 0.180V to prevent MOSFET thermal runaway. Use Value: Prevents irreversible capacity loss and thermal hazard during sustained 20A+ loads typical in brushed motor tools. |
Use Scenario: Rechargeable ECG patch requiring multi-year shelf life and guaranteed first-use reliability after storage. IC Role / Device Role / Timing Role: Uses power-down mode (0.01µA) during shipment/storage; auto-wakes upon charger attachment to enable 0V charge recovery. Use Value: Eliminates field failures due to self-discharged batteries, ensuring clinical readiness without manual pre-conditioning. |
| Bluetooth Headsets | IoT Sensor Nodes |
|
Use Scenario: Compact Li-ion pack powering noise-cancelling circuitry with intermittent 500mA peak loads. IC Role / Device Role / Timing Role: Detects overdischarge at 2.500V and releases at 2.900V hysteresis to preserve cycle life while avoiding brownout resets. Use Value: Extends usable runtime per charge by 8–12% versus fixed-threshold protectors lacking precise hysteresis control. |
Use Scenario: Solar-powered environmental sensor node operating in remote locations with infrequent maintenance. IC Role / Device Role / Timing Role: Combines overvoltage charger detection (8.0V) and short-circuit response (<1µs) to survive lightning-induced surges on solar input lines. Use Value: Avoids costly field replacements by sustaining operation through transient events that would destroy unprotected packs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5640T252B-TR | Fixed 4.25V overcharge threshold; no 0V charge support; 1.2µA operating current | Lacks configurable thresholds and 0V recovery - suitable only for cost-sensitive, non-recoverable consumer packs | Choose only if design locks to 4.25V OCV and eliminates need for post-storage recharge capability |
| BD85501GUL | Integrated charge/discharged MOSFETs; 2.0V–4.45V adjustable OCV; 1.8µA ICC | Higher integration but larger 2.0mm × 1.6mm DFN package; no overvoltage charger detection | Prefer when board space is constrained and discrete FETs are undesirable, accepting loss of 30V VM–VDD tolerance |
Compared with R5640T252B-TR and BD85501GUL, AP9101CK-AFTRG1 uniquely combines factory-programmed 4.375V/2.500V/0.180V thresholds, 0V charge permission, and 30V VM–VDD ruggedness - making it optimal for industrial-grade 1-cell packs where recoverability, precision, and surge resilience are mandatory.
Availability
AP9101CK-AFTRG1 is available at Aetrix Electronics and suitable for power tools, medical wearables, Bluetooth headsets, and IoT sensor nodes requiring stable component supply, long-term lifecycle continuity, and traceable green sourcing.
Supply support for AP9101CK-AFTRG1 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 solutions, with ISO/TS 16949-certified manufacturing and broad automotive qualification capabilities.
The AP9101C product line delivers highly integrated, programmable battery protection ICs optimized for compact 1-cell Li-ion/Li-polymer packs in portable electronics, emphasizing precision voltage monitoring, ultra-low quiescent current, and robust fault response.
FAQ
What is the function of the VM pin on AP9101CK-AFTRG1?
The VM pin senses the voltage drop across an external current-sense resistor connected between the battery's P− terminal and system ground. It enables detection of discharge overcurrent (at 0.180V), short-circuit (at 0.700V), and charge overcurrent (at −0.180V) by comparing VM–VSS to internal thresholds. Its 30V absolute maximum rating relative to VDD ensures resilience during polarity reversals or charger surges.
Does AP9101CK-AFTRG1 support automatic recovery from overdischarge?
Yes - when configured with "Auto Release" mode (as indicated by the 'A' in the part number suffix), the device recovers from overdischarge either by detecting battery voltage rising above 2.900V (VDU) or by connecting a charger. This eliminates manual intervention and supports unattended operation in sealed battery systems like medical patches or remote sensors.
How does the 0V battery charge function operate in AP9101CK-AFTRG1?
The 0V battery charge function is factory-enabled ("Permission") in AP9101CK-AFTRG1. When the battery voltage is 0V, the IC permits charging to begin once the charger applies ≥1.2V to VDD, allowing recovery of deeply self-discharged cells without external wake-up circuitry. This avoids permanent capacity loss in long-shelf-life applications.
Can AP9101CK-AFTRG1 be used in automotive applications?
AP9101CK-AFTRG1 itself is not AEC-Q100 qualified, but Diodes Incorporated offers automotive-grade variants (e.g., AP9101CAx-x-xxxA) with PPAP support and IATF 16949 manufacturing. For non-safety-critical 12V accessory systems or infotainment backup power, this part may be used with customer-level validation; consult Diodes' automotive team for qualified alternatives.
AP9101CK-AFTRG1 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
AP9101CK-AFTRG1 FAQ
1.How can I place an order for AP9101CK-AFTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-AFTRG1 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-AFTRG1 reliable?
The price and inventory of AP9101CK-AFTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-AFTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-AFTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-AFTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-AFTRG1?
AP9101CK-AFTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-AFTRG1 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-AFTRG1?
For technical support, including AP9101CK-AFTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-AFTRG1 requirements.
6.How does Aetrix verify that AP9101CK-AFTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-AFTRG1 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-AFTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-AFTRG1?
All AP9101CK-AFTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-AFTRG1, 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-AFTRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-AFTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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