My Inquiry
My Account
Diodes Incorporated AP9101CAK-CFTRG1
- Part No.:
- AP9101CAK-CFTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-CFTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,223
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP9101CAK-CFTRG1 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 0.150V ±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, Bluetooth headsets, and wearable medical monitors.
For engineers reviewing the AP9101CAK-CFTRG1 datasheet, AP9101CAK-CFTRG1 pinout, AP9101CAK-CFTRG1 application, or AP9101CAK-CFTRG1 equivalent, this device delivers precision voltage thresholds, selectable 0V-charge capability, auto-release overcharge protection, and high-voltage tolerance (30V VDD–VM) - critical for robust 1S Li+ pack safety design.
Technical Context
The AP9101CAK-CFTRG1 implements dual independent voltage monitoring paths: one between VDD–VSS for cell voltage (overcharge/overdischarge), another across VM–VSS for current-sense voltage (discharge/charge overcurrent, short-circuit). Its logic circuit enforces auto-release behavior on overcharge and uses internal RVMD/RVMS resistors to enable overdischarge recovery without external components.
It supports two operational modes: power-down mode (0.01µA standby) activated by factory configuration, and auto-wake-up mode that maintains active monitoring during overdischarge. The built-in 8.0V ±2V overvoltage charger detector operates without delay and directly disables CO to protect against faulty chargers.
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 - prevents deep discharge damage to Li+ cell anode structure |
| Discharge Overcurrent Threshold | 0.150V ±15mV - enables accurate current limiting using low-value sense resistor (e.g., 5mΩ) |
| Supply Current (Operation) | 3.0µA typ at 3.5V - extends battery shelf life in always-connected applications |
| VDD–VM Absolute Max | 30V - supports direct connection to unregulated wall adapters or automotive USB-PD sources |
| 0V Battery Charge Function | Enabled - allows safe recharge of fully depleted cells without manual pre-charge circuitry |
| Overvoltage Charger Detect | 8.0V ±2V - shuts down charging if input exceeds safe level, preventing thermal runaway |
Pinout & Package
AP9101CAK-CFTRG1 is packaged in SOT25 (5-pin) - a compact, surface-mount plastic package with 0.95mm pitch and exposed pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current Sense Input | Monitors voltage drop across external sense resistor to detect charge/discharge overcurrent and short-circuit events |
| 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 discharge MOSFET; pulled low to disable discharge path during fault conditions |
| CO | Charge Control Output | Drives gate of external charge MOSFET; pulled low to disable charge path during overcharge or overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Delay Timing | No external capacitor needed - reduces BOM count and PCB area vs. RC-timed alternatives |
| High-Accuracy Voltage Detection | ±25mV overcharge threshold tolerance ensures consistent cell voltage cutoff across temperature and unit variance |
| Selectably Enabled 0V Charge | Factory-configured to permit safe reactivation of deeply discharged cells without external wake-up circuitry |
| Auto-Release Overcharge Protection | Automatically restores charge path when cell voltage drops below 4.175V, eliminating manual reset requirement |
| 30V VDD–VM Tolerance | Supports direct integration with high-voltage chargers or boost converters without level-shifting circuitry |
Applications
| Power Tool Battery Packs | Wireless Earbud Charging Cases |
|---|---|
|
Use Scenario: Rechargeable 1S Li+ pack powering cordless drills with peak discharge currents >10A. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage and current sense voltage to prevent overcharge, overdischarge, and short-circuit faults. Use Value: Enables use of low-resistance sense resistors (e.g., 5mΩ) while maintaining ±15mV detection accuracy, minimizing power loss and heat generation during high-current operation. |
Use Scenario: Compact 1S Li+ battery inside charging case for true wireless stereo earbuds with tight space constraints. IC Role / Device Role / Timing Role: Single-chip safety manager handling overvoltage charger detection, 0V battery recovery, and ultra-low quiescent current (<3µA) to preserve case battery shelf life. Use Value: Eliminates need for external timing capacitors and discrete voltage references, reducing component count by ≥3 parts per pack versus discrete solutions. |
| Portable Medical Monitors | Smart Wearable Sensors |
|
Use Scenario: Clinical-grade pulse oximeter with 1S Li+ battery requiring fail-safe shutdown under abnormal charging conditions. IC Role / Device Role / Timing Role: Safety-critical protector enforcing IEC 62133-compliant voltage and current limits with ±25mV overcharge detection accuracy. Use Value: Built-in 8.0V overvoltage charger detection provides hardware-level defense against non-compliant USB-C chargers, meeting essential risk management requirements. |
Use Scenario: Fitness tracker with 1S Li+ battery operating in variable-temperature environments (-10°C to +50°C). IC Role / Device Role / Timing Role: Temperature-stable protection IC delivering <±65mV overdischarge hysteresis variation across full -40°C to +85°C range. Use Value: Maintains reliable deep-discharge prevention even after prolonged storage at low temperatures, avoiding irreversible capacity loss. |
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 overvoltage charger detection; requires external timing capacitor | Lacks 8.0V charger overvoltage protection and 0V-charge function; suited for cost-sensitive consumer electronics only | Select when strict 4.25V cutoff is mandated and charger overvoltage risk is mitigated externally |
| Ricoh RP502K001B-TR-F | Lower 2.0µA operating current; no selectable 0V charge; supports 2-cell configuration via external resistor network | Requires additional components for 1S operation; lacks integrated overvoltage charger monitor | Prefer for ultra-low-power applications where 0V recovery and charger fault protection are not required |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, AP9101CAK-CFTRG1 uniquely integrates overvoltage charger detection, factory-enabled 0V charge, and capacitor-free timing - reducing system-level BOM, improving safety compliance, and simplifying qualification for medical and industrial 1S Li+ designs.
Availability
AP9101CAK-CFTRG1 is available at Aetrix Electronics and suitable for power tool battery packs, wireless earbud charging cases, and portable medical monitors requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AP9101CAK-CFTRG1 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 belongs to Diodes' battery protection IC product line, engineered specifically for single-cell Li+ and Li-polymer battery packs requiring precision voltage monitoring, ultra-low quiescent current, and integrated fault response without external timing components.
FAQ
What is the function of the VM pin on AP9101CAK-CFTRG1?
The VM pin serves as the current-sense input terminal, measuring voltage drop across an external sense resistor to detect discharge overcurrent, charge overcurrent, and short-circuit conditions. It interfaces directly with the battery's P– node and enables the IC to trigger DO or CO shutdown within microseconds when fault thresholds are exceeded, without requiring external amplification or filtering.
Does AP9101CAK-CFTRG1 support automatic recovery from overdischarge?
Yes - AP9101CAK-CFTRG1 supports auto-wake-up mode, allowing recovery from overdischarge when the battery voltage rises above the overdischarge release voltage (2.900V) without requiring external charger connection. This behavior is factory-configured and eliminates manual intervention or external wake-up circuitry in wearables and IoT devices.
Can AP9101CAK-CFTRG1 be used with 2-cell battery packs?
No - AP9101CAK-CFTRG1 is designed exclusively for 1-cell Li+ or Li-polymer configurations. Its voltage detection ranges (e.g., 2.0V–3.4V overdischarge, 3.5V–4.5V overcharge) and internal architecture assume a single-cell topology. For 2S applications, Diodes offers the AP9211 series, which supports stacked-cell monitoring and balancing.
What does the "CF" in AP9101CAK-CFTRG1 indicate?
The "CF" suffix denotes the specific voltage/delay configuration: overcharge detection at 4.375V, overcharge release at 4.175V, overdischarge detection at 2.500V, overdischarge release at 2.900V, discharge overcurrent at 0.150V, short-circuit detection at 0.700V, and charge overcurrent at –0.150V - all with factory-enabled 0V battery charge and auto-release overcharge protection mode.
AP9101CAK-CFTRG1 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-CFTRG1 FAQ
1.How can I place an order for AP9101CAK-CFTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-CFTRG1 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-CFTRG1 reliable?
The price and inventory of AP9101CAK-CFTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-CFTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-CFTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-CFTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-CFTRG1?
AP9101CAK-CFTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-CFTRG1 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-CFTRG1?
For technical support, including AP9101CAK-CFTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-CFTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-CFTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-CFTRG1 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-CFTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-CFTRG1?
All AP9101CAK-CFTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-CFTRG1, 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-CFTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-CFTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP9101CAK-CFTRG1 Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
