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Diodes Incorporated AP9101CK-AMTRG1
- Part No.:
- AP9101CK-AMTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-AMTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,661
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Product details
Overview
AP9101CK-AMTRG1 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 2.300V ±35mV, discharge overcurrent detection at 0.180V ±15mV, and integrated fixed-delay timing with no external capacitor required. It controls external N-channel MOSFETs via dedicated CO and DO gate drive pins in portable power tools and Bluetooth headsets.
For engineers reviewing the AP9101CK-AMTRG1 datasheet, AP9101CK-AMTRG1 pinout, AP9101CK-AMTRG1 application, or AP9101CK-AMTRG1 equivalent, this device delivers precise voltage thresholds, selectable 0V charge and power-down modes, high-voltage VM–VDD tolerance (up to 30V), and RoHS/Green compliance - critical for compact, safety-certified Li+ pack designs.
Technical Context
The AP9101CK-AMTRG1 implements independent analog comparators for overcharge (VCU = 4.375V), overdischarge (VDL = 2.300V), discharge overcurrent (VDOC = 0.180V), short-circuit (VSHORT = 0.700V), and charge overcurrent (VCOC = −0.180V), each with programmable hysteresis and ±20% delay time accuracy. Its logic circuit directly drives CO and DO outputs without external level shifters.
It uses internal high-voltage CMOS process enabling 30V differential rating between VDD and VM pins, supports 0V battery charging activation at ≥1.2V charger input, and includes factory-configurable power-down mode (enabled) and auto-release overcharge protection - all operating across −40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - triggers CO pin low after tCU delay to halt charging before cell damage |
| Overdischarge Detection Voltage | 2.300V ±35mV - asserts DO pin low after tDL delay to prevent deep discharge degradation |
| Discharge Overcurrent Threshold | 0.180V ±15mV - detects excessive load current via VM–VSS sense voltage, disabling DO |
| Supply Current (Operation) | 3.0µA typ at VDD = 3.5V - enables multi-year runtime in always-on battery monitoring |
| VM–VDD Absolute Max Rating | 30V - allows direct connection to high-side charger inputs without external clamping |
| Operating Temperature | −40°C to +85°C - supports industrial-grade portable equipment deployment |
| Package | SOT25 - 5-pin surface-mount package with 1.6mm × 2.9mm footprint for space-constrained PCBs |
Pinout & Package
SOT25 package: 5-pin, small-outline transistor outline with gull-wing leads; 1.6mm × 2.9mm body size, 0.95mm height, 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VM) | Charger Negative Input / Current Sense Node | Monitors voltage drop across R2 to detect charge/discharge current; connects internally to RVMS/RVMD during fault states |
| 2 (VDD) | Positive Power Input | Supplies IC core from battery anode; accepts 1.5V–5.5V; rated up to 30V vs VM |
| 3 (VSS) | Negative Power Input / Ground Reference | System ground reference for all comparators and logic; tied to battery cathode |
| 4 (DO) | Discharge FET Gate Control Output | Drives gate of external N-MOSFET (P− path); high = discharge enabled, low = discharge blocked |
| 5 (CO) | Charge FET Gate Control Output | Drives gate of external N-MOSFET (P+ path); high = charge enabled, low = charge blocked |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-time protection delay | No external capacitor needed - reduces BOM count and layout area by eliminating timing RC networks |
| Selectable 0V battery charge | Factory-enabled - permits safe recharge of fully depleted cells without manual reset or external wake-up circuitry |
| Power-down mode | 0.01µA typ standby current - extends shelf life of sealed battery packs during storage |
| High-accuracy voltage detection | ±25mV overcharge threshold tolerance - ensures tight cell voltage control within JEITA limits |
| Overvoltage charger detection | 8.0V fixed VOVCHG threshold - protects against faulty chargers exceeding safe 1-cell Li+ limits |
Applications
| Power Tool Battery Packs | Wireless Headset Batteries |
|---|---|
|
Use Scenario: 18V/20V cordless drill battery with dual-MOSFET protection circuit. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage, charge/discharge current, and charger overvoltage; asserts CO/DO within 1.0ms typical delay. Use Value: Prevents thermal runaway during high-current operation and enables automatic recovery after charger disconnect. |
Use Scenario: Compact 3.7V Li+ pack in noise-cancelling Bluetooth earbuds with ultra-low quiescent current requirement. IC Role / Device Role / Timing Role: Low-power protector managing 0V charge enablement and overdischarge release at 2.400V to preserve cycle life. Use Value: Extends shelf life via 0.01µA power-down mode and avoids false lockout during brief low-load voltage sag. |
| Medical Portable Monitors | Smart Wearable Sensors |
|
Use Scenario: Rechargeable vital-sign monitor using 1-cell Li+ with IEC 62368-1 safety compliance requirements. IC Role / Device Role / Timing Role: Safety-critical voltage/current supervisor enforcing strict overcharge (4.375V) and overdischarge (2.300V) limits per medical standards. Use Value: Meets functional safety margin requirements with ±25mV detection accuracy and fixed-delay fault response. |
Use Scenario: Fitness tracker with 120mAh Li+ cell requiring minimal footprint and long idle battery life. IC Role / Device Role / Timing Role: Integrated protector providing short-circuit detection (0.700V threshold) and discharge overcurrent cutoff (0.180V) without external components. Use Value: Eliminates need for discrete sense resistors and comparator circuits, reducing solution size by >30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar lithium-ion battery protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP9101CK-AETRG1 | Lower overdischarge release voltage (3.000V vs 2.400V); higher VDOC (0.300V vs 0.180V) | Better suited for high-impedance loads where voltage recovery post-discharge is slow | Select when system requires wider VDL–VDU hysteresis to avoid chatter during marginal discharge conditions |
| AP9101CK-AFTRG1 | Higher VDOC (0.180V → 0.180V same), but VCU/VCL shifted to 4.425V/4.225V; identical SOT25 package | Optimized for higher-voltage Li+ cells (e.g., 4.4V max-rated) while retaining same fault timing | Choose for newer high-energy-density cells needing tighter upper voltage margin without changing layout |
Compared with AP9101CK-AETRG1 and AP9101CK-AFTRG1, the AP9101CK-AMTRG1 provides the narrowest overdischarge hysteresis (2.300V → 2.400V) and lowest VDL, making it optimal for applications demanding aggressive low-voltage cutoff to maximize usable capacity in space-constrained devices.
Availability
AP9101CK-AMTRG1 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headset batteries, medical portable monitors, and smart wearable sensors requiring stable component supply, full RoHS/Green compliance, and guaranteed long-term lifecycle support.
Supply support for AP9101CK-AMTRG1 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The AP9101C product line delivers single-chip Li+ battery protection solutions targeting cost-sensitive, space-constrained portable electronics - emphasizing precision voltage sensing, ultra-low quiescent current, and simplified external component count.
FAQ
What is the function of the VM pin on the AP9101CK-AMTRG1?
The VM pin serves as the current-sense input node between the battery pack's P− terminal and the discharge MOSFET source. It measures voltage drop across the sense resistor (R2) to detect discharge overcurrent, charge overcurrent, and short-circuit conditions. Internally, it connects to high-impedance resistors (RVMS/RVMD) during fault states to bias the pin for accurate threshold comparison without loading the sense path.
Does the AP9101CK-AMTRG1 support 0V battery charging, and how is it activated?
Yes - the AP9101CK-AMTRG1 has factory-enabled 0V battery charge functionality. When the battery voltage is 0V, connecting a charger that supplies ≥1.2V at the VDD pin activates internal wake-up circuitry, allowing the IC to exit power-down mode and enable charging via the CO pin. No external reset or jumper is required.
How does the overcharge protection release mechanism work on this device?
The AP9101CK-AMTRG1 uses auto-release overcharge protection: once overcharge is triggered (VCU exceeded for tCU), the CO pin goes low to disable charging. Release occurs when battery voltage falls to ≤4.175V (VCL) *and* the VM pin voltage drops below VDOC (0.180V), indicating no active charge current - ensuring safe re-enablement only after both voltage and current conditions are satisfied.
Can the AP9101CK-AMTRG1 be used in automotive applications?
No - the AP9101CK-AMTRG1 is not AEC-Q100 qualified and is specified for industrial temperature range (−40°C to +85°C), not automotive grade (−40°C to +125°C). Diodes Incorporated offers separate AEC-Q100-qualified variants (e.g., AP9101CA series) with PPAP documentation and IATF 16949 manufacturing for automotive use cases.
AP9101CK-AMTRG1 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-AMTRG1 FAQ
1.How can I place an order for AP9101CK-AMTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-AMTRG1 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-AMTRG1 reliable?
The price and inventory of AP9101CK-AMTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-AMTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-AMTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-AMTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-AMTRG1?
AP9101CK-AMTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-AMTRG1 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-AMTRG1?
For technical support, including AP9101CK-AMTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-AMTRG1 requirements.
6.How does Aetrix verify that AP9101CK-AMTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-AMTRG1 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-AMTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-AMTRG1?
All AP9101CK-AMTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-AMTRG1, 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-AMTRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-AMTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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