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Diodes Incorporated AP9101CAK-AFTRG1
- Part No.:
- AP9101CAK-AFTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-AFTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,884
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Product details
Overview
AP9101CAK-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, and built-in 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, Bluetooth headsets, and medical wearable devices.
For engineers reviewing the AP9101CAK-AFTRG1 datasheet, AP9101CAK-AFTRG1 pinout, AP9101CAK-AFTRG1 application, or AP9101CAK-AFTRG1 equivalent, this device supports selectable 0V battery charge function and power-down mode, delivers ultra-low 3.0µA typical operating current, and integrates overvoltage charger protection (8.0V detection) for robust 1-cell Li+ pack safety compliance.
Technical Context
The AP9101CAK-AFTRG1 implements independent voltage and current monitoring paths: VDD–VSS sensing for cell voltage thresholds (VCU, VDL, VCL, VDU), and VM–VSS differential sensing for discharge/charge overcurrent (VDOC, VCOC) and short-circuit (VSHORT) events. Its logic circuit enforces auto-release overcharge protection with fixed 4.175V release voltage and 2.900V overdischarge release.
It uses internal high-voltage CMOS process enabling 30V VDD–VM rating, supports dual configuration options (power-down vs. auto-wake-up), and includes factory-programmed voltage thresholds - specifically 4.375V/4.175V overcharge detection/release, 2.500V/2.900V overdischarge detection/release, and 0.180V/−0.180V discharge/charge overcurrent detection - all with guaranteed accuracy across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - sets precise upper cell voltage limit before disabling charge path |
| Overdischarge Detection Voltage | 2.500V ±35mV - triggers discharge cutoff to prevent deep discharge damage |
| Discharge Overcurrent Threshold | 0.180V ±15mV - determines current limit based on sense resistor drop (e.g., 10mΩ → 18A) |
| Operating Current | 3.0µA typ at 3.5V - enables multi-year battery standby life in low-power devices |
| VDD–VM Rating | 30V - supports high-voltage charger input monitoring without external level shifters |
| 0V Battery Charge Function | Enabled - allows safe recharge of fully depleted cells down to 0V without manual intervention |
| Package | SOT25 - 5-pin compact surface-mount package with 1.6mm × 2.9mm footprint for space-constrained battery modules |
Pinout & Package
SOT25 package: 5-pin, small-outline transistor outline with exposed thermal pad (not electrically connected); pin 1 marked; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VM) | Charger Negative Input / Current Sense | Monitors voltage drop across external sense resistor to detect charge/discharge overcurrent and short-circuit conditions |
| 2 (VDD) | Positive Power Input | Supplies IC core logic; accepts 1.5–5.5V; internally powers voltage reference and comparators |
| 3 (VSS) | Negative Power Input / Ground Reference | Common return for VDD, VM, CO, and DO; defines 0V reference for all analog measurements |
| 4 (DO) | Discharge FET Gate Control | Drives high-side or low-side N-MOSFET gate to disconnect load during overdischarge or overcurrent events |
| 5 (CO) | Charge FET Gate Control | Drives N-MOSFET gate to disable charging path during overcharge, overvoltage charger, or charge overcurrent faults |
Key Features
| Feature | Design Value |
|---|---|
| Built-in fixed delay timing | Eliminates need for external timing capacitors - reduces BOM count and PCB area in battery packs |
| Selectable power-down mode | Reduces quiescent current to 0.1µA typ - extends shelf life of sealed battery assemblies |
| Factory-configured voltage thresholds | 4.375V/4.175V overcharge detection/release ensures consistent protection behavior across production lots |
| Overvoltage charger detection | 8.0V ±2V detection on VDD–VM prevents damage from faulty or mismatched chargers |
| 0V battery charge enable | Permits automatic recovery from total self-discharge - avoids field returns due to "dead" battery appearance |
Applications
| Power Tool Battery Packs | Wireless Headset Charging Cases |
|---|---|
|
Use Scenario: 18V cordless drill battery with integrated protection board requiring reliable overcurrent cutoff during stall conditions. IC Role / Device Role / Timing Role: Primary protection controller managing dual N-MOSFET switch array; executes 1.2ms discharge overcurrent detection delay (tDOC). Use Value: Prevents MOSFET thermal runaway by cutting off >18A discharge within 1.2ms using 0.180V threshold and 10mΩ sense resistor. |
Use Scenario: Compact charging case for true wireless stereo earbuds needing minimal footprint and zero-maintenance recharge capability. IC Role / Device Role / Timing Role: Single-chip safety manager handling cell voltage, current, and charger overvoltage; enables 0V battery charge recovery. Use Value: Eliminates user "bricking" of earbuds left unused for months - reactivates from 0V via standard USB charger without service intervention. |
| Medical Wearable Monitors | Smart Pen Batteries |
|
Use Scenario: FDA-classified continuous glucose monitor with sealed Li+ pouch cell requiring AEC-Q200-aligned reliability and low leakage. IC Role / Device Role / Timing Role: Safety-critical protector enforcing 2.500V overdischarge cutoff and 3.0µA max operating current to preserve battery capacity. Use Value: Extends usable battery life by >15% versus higher-quiescent alternatives - critical for 7-day wearable runtime targets. |
Use Scenario: Rechargeable stylus for tablets where accidental deep discharge occurs during long storage periods. IC Role / Device Role / Timing Role: Embedded protection IC with factory-set 4.375V/2.500V thresholds and auto-release logic for seamless user experience. Use Value: Enables full functional recovery after 12-month storage at room temperature - no firmware reset or service required. |
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 overcharge hysteresis; 5-pin SOT-25 package | Lacks 0V charge function and overvoltage charger detection; suited for cost-sensitive consumer electronics | Choose when strict 2.500V overdischarge match is required but advanced charger monitoring is unnecessary |
| BD14000FVJ-E2 | Integrated charge/discharge FETs (no external MOSFETs); 6-pin TSSOP package; 2.7V overdischarge threshold | Higher RDS(on) limits current capability; not suitable for >3A continuous loads | Prefer for ultra-compact designs where external FET layout is impractical and 2.7V cutoff is acceptable |
Compared with R5460N258AA-TR and BD14000FVJ-E2, AP9101CAK-AFTRG1 provides tighter voltage accuracy (±25mV vs. ±50mV), integrated overvoltage charger protection, and factory-enabled 0V charge - making it optimal for premium portable medical and industrial battery packs demanding long-term reliability and zero-maintenance recovery.
Availability
AP9101CAK-AFTRG1 is available at Aetrix Electronics and suitable for power tool battery packs, wireless headset charging cases, and medical wearable monitors requiring stable component supply, long-lifecycle support, and guaranteed RoHS/Green compliance.
Supply support for AP9101CAK-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP9101C product line delivers single-chip Li+ battery protection with configurable thresholds and integrated safety features - designed specifically for space-constrained, high-volume 1-cell battery applications where BOM reduction and field reliability are critical.
FAQ
What is the function of the VM pin on AP9101CAK-AFTRG1?
The VM pin serves as the current-sense input terminal, measuring voltage drop across an external sense resistor between the battery's P− node and load/charger path. It enables detection of discharge overcurrent (≥0.180V), charge overcurrent (≤−0.180V), and short-circuit (≥0.700V) events. Internally, VM connects to high-impedance comparators and is isolated from VDD/VSS during normal operation to avoid interference.
Does AP9101CAK-AFTRG1 require external timing capacitors?
No. The AP9101CAK-AFTRG1 integrates fixed-time delay circuits for all protection functions - including 1.2ms overcharge detection delay (tCU), 1.2ms overdischarge delay (tDL), and 1.2ms discharge overcurrent delay (tDOC). This eliminates external capacitors, reduces bill-of-materials cost, and improves production yield consistency across temperature and voltage ranges.
How does the 0V battery charge function operate?
When enabled (as in AP9101CAK-AFTRG1), the 0V battery charge function allows the IC to activate its internal regulators and comparators even when the battery voltage is 0V. Upon charger connection, the device detects ≥1.2V at VDD and initiates controlled charging - bypassing the normal under-voltage lockout - enabling full recovery of deeply discharged cells without manual intervention or service tools.
Can AP9101CAK-AFTRG1 be used with 2-cell Li+ batteries?
No. AP9101CAK-AFTRG1 is strictly rated for 1-cell Li+ or Li-polymer batteries with maximum VDD–VSS operating range of 1.5V to 5.5V. Its overcharge detection threshold (4.375V) and absolute maximum VDD–VSS rating (12V) do not support series-connected 2-cell configurations (nominal 7.4V, full-charge ~8.4V), which would exceed both functional and safe operating limits.
AP9101CAK-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
AP9101CAK-AFTRG1 FAQ
1.How can I place an order for AP9101CAK-AFTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-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 AP9101CAK-AFTRG1 reliable?
The price and inventory of AP9101CAK-AFTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-AFTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-AFTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-AFTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-AFTRG1?
AP9101CAK-AFTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-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 AP9101CAK-AFTRG1?
For technical support, including AP9101CAK-AFTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-AFTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-AFTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-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 AP9101CAK-AFTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-AFTRG1?
All AP9101CAK-AFTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-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 AP9101CAK-AFTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-AFTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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