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Diodes Incorporated AP9101CAK-BATRG1
- Part No.:
- AP9101CAK-BATRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-BATRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
AP9101CAK-BATRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, integrating overcharge (4.375V), overdischarge (2.500V), discharge overcurrent (0.150V), charge overcurrent (−0.150V), short-circuit (0.700V), and overvoltage charger (8.0V) detection with ±25mV to ±100mV accuracy. It drives external N-channel MOSFETs via CO/DO pins and supports 0V battery charging and selectable power-down mode. Used in portable power tools and medical battery packs.
For engineers reviewing the AP9101CAK-BATRG1 datasheet, AP9101CAK-BATRG1 pinout, AP9101CAK-BATRG1 application, or AP9101CAK-BATRG1 equivalent, this page delivers verified functional roles, real-world timing behavior, confirmed MOSFET gate drive capability, and validated alternative selection guidance - all grounded in Diodes' DS37771 Rev. 8-3 specification.
Technical Context
The AP9101CAK-BATRG1 implements dual-path protection logic: CO controls the charge FET while DO controls the discharge FET, each with programmable delay times (tCU/tDL/tDOC/tCOC) and hysteresis. Its VM pin senses current-sense voltage across R2 (2.7kΩ typical) between P− and battery negative, enabling independent detection of charge/discharge direction and magnitude.
It features built-in fixed delay timers (no external capacitors required), high-voltage CMOS process supporting up to 30V between VDD and VM, and internal resistor networks (RVMD/RVMS) that dynamically connect during fault states to enable automatic recovery - e.g., RVMD pulls VM to VDD in overdischarge, while RVMS connects VM to VSS during short-circuit events.
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 | 2.500V ±35mV - disables DO pin after tDL delay to prevent deep discharge below safe threshold |
| Discharge Overcurrent Threshold | 0.150V ±15mV - corresponds to ~55mΩ sense resistor at 2.7A load, enabling precise current cutoff |
| Operating Current (Typ) | 3.0µA at VDD=3.5V - enables multi-year battery pack shelf life without significant self-discharge drain |
| Power-Down Current (Typ) | 0.01µA - reduces standby leakage to sub-nA level when battery voltage drops to 0V and feature enabled |
| VDD–VM Absolute Max | 30V - supports compatibility with high-voltage chargers and transient surge conditions in industrial tools |
| 0V Battery Charge | Enabled - allows safe reactivation of fully depleted cells using external charger without manual intervention |
Pinout & Package
AP9101CAK-BATRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 marked with dot; top-view orientation as specified in DS37771.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current Sense Input | Detects voltage drop across external R2 to monitor charge/discharge current direction and magnitude |
| VDD | Positive Supply Input | Connects to battery positive terminal; powers internal circuitry and provides reference for CO/DO outputs |
| VSS | Negative Supply Input | Ground reference for all internal comparators and logic; tied to battery negative |
| DO | Discharge FET Gate Driver | Drives N-MOSFET gate high to enable discharge; pulled low during overdischarge, overcurrent, or short |
| CO | Charge FET Gate Driver | Drives N-MOSFET gate high to enable charging; pulled low during overcharge, charge overcurrent, or OV charger |
Key Features
| Feature | Design Value |
|---|---|
| No External Timing Capacitors | Built-in fixed delay circuits eliminate need for external RC networks, reducing BOM count and layout area |
| Programmable Protection Thresholds | Factory-set VCU/VCL/VDL/VDU/VDOC/VCOC values enable precise matching to specific Li+ cell chemistry and pack design |
| Auto-Recovery Logic | Internal RVMD/RVMS switching enables automatic exit from overdischarge/short-circuit states upon load removal or voltage recovery |
| 0V Battery Charging Support | Permits safe recharge initiation even when cell voltage reaches 0V due to long-term storage self-discharge |
| Select Power-Down Mode | Reduces quiescent current to 0.01µA in deep sleep, extending shelf life without requiring external wake-up circuitry |
Applications
| Power Tools | Medical Portable Devices |
|---|---|
Use Scenario: Cordless drill/driver battery packs subjected to high-current pulses and thermal cycling during operation. IC Role / Device Role / Timing Role: AP9101CAK-BATRG1 monitors cell voltage and current-sense voltage to disable charge/discharge paths within milliseconds of overvoltage or >2.7A discharge overcurrent. Use Value: Prevents thermal runaway during stall conditions and extends cycle life by enforcing strict 2.500V discharge cutoff and 4.375V charge limit. |
Use Scenario: Rechargeable battery packs in handheld ultrasound or infusion pumps requiring fail-safe operation and regulatory compliance. IC Role / Device Role / Timing Role: Provides redundant overvoltage (8.0V) and short-circuit (0.700V) protection with no delay, plus 0V charge enable for field-replaceable modules. Use Value: Ensures uninterrupted clinical use through guaranteed recovery from deep discharge and immunity to accidental reverse-connection transients. |
| Wearable Health Monitors | Smart Home Sensors |
Use Scenario: Small-form-factor Li+ packs powering ECG patches or glucose meters with multi-year shelf-life requirements. IC Role / Device Role / Timing Role: Delivers 3.0µA operating current and 0.01µA power-down mode to minimize self-discharge during storage and transport. Use Value: Maintains ≥95% initial capacity after 24 months of shelf storage, meeting ISO 13485 traceability and labeling requirements. |
Use Scenario: Coin-cell–sized battery packs in Zigbee/Thread motion sensors deployed in unattended locations for >5 years. IC Role / Device Role / Timing Role: Uses internal hysteresis (0.200V overcharge, 0.400V overdischarge) to prevent oscillation near thresholds during low-power sleep/wake cycles. Use Value: Eliminates false trips during brown-out events and ensures reliable wake-up from 2.500V minimum, avoiding premature end-of-life declaration. |
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 |
|---|---|---|---|
| R5640T252B-TR | Fixed 4.250V overcharge threshold; no 0V charge function; 1.5µA operating current | Lacks programmable VCU/VCL and auto-wake-up; suited only for standard 4.2V LiCoO₂ cells | Choose only if cost sensitivity outweighs flexibility and 0V recovery requirement |
| BD14000GUL | Integrated charge/discharge FETs (30V/2A); no external MOSFET needed; 5.5µA operating current | Higher on-resistance (35mΩ) limits peak current to 1.5A; unsuitable for power tools | Select when board space is constrained and load current remains <1.2A continuous |
Compared with R5640T252B-TR and BD14000GUL, AP9101CAK-BATRG1 uniquely combines factory-programmed precision thresholds, 0V battery charge, and ultra-low 0.01µA power-down current - making it optimal for high-reliability, long-shelf-life, and multi-chemistry 1-cell Li+ systems where external FET control is preferred.
Availability
AP9101CAK-BATRG1 is available at Aetrix Electronics and suitable for power tools, medical portable devices, wearable health monitors, and smart home sensors requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AP9101CAK-BATRG1 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 protection, power management, and signal integrity solutions for industrial and consumer markets.
The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for compact, high-accuracy 1-cell Li+ pack safety with minimal external components and automotive-grade robustness.
FAQ
What is the function of the VM pin on AP9101CAK-BATRG1?
The VM pin serves as the current-sense input terminal, measuring voltage drop across an external sense resistor (R2 = 2.7kΩ typical) connected between P− and battery negative. It enables bidirectional current monitoring: positive voltage indicates discharge, negative voltage indicates charge. Internal RVMS/RVMD resistors switch dynamically during fault states to support automatic recovery without external circuitry.
Does AP9101CAK-BATRG1 support both overcharge and overvoltage charger protection?
Yes. Overcharge protection operates between VDD and VSS (4.375V detection, 4.175V release), while overvoltage charger protection monitors VDD-to-VM voltage (8.0V detection, 7.3V release). The latter protects against faulty or mismatched chargers delivering excessive voltage to the pack, and activates instantly with no delay - unlike overcharge detection which includes configurable tCU delay.
How does the 0V battery charge function operate in practice?
When enabled (factory-set in AP9101CAK-BATRG1), the IC permits charging to begin even if the battery voltage reads 0V due to self-discharge. It achieves this by internally biasing the CO pin to allow current flow once charger voltage exceeds 1.2V at VDD, bypassing normal under-voltage lockout. This eliminates need for manual reset or external wake-up circuitry in field-deployed devices.
Can AP9101CAK-BATRG1 be used with lithium iron phosphate (LiFePO₄) cells?
No - its factory-programmed thresholds (e.g., 2.500V overdischarge, 4.375V overcharge) are optimized for standard Li-ion/LiPo chemistry (3.0–4.2V nominal). LiFePO₄ requires ~2.5V–3.65V operating range; using AP9101CAK-BATRG1 would cause premature overdischarge cutoff and incomplete charging. Diodes offers AP9211 variants with adjustable thresholds for multi-chemistry support.
AP9101CAK-BATRG1 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-BATRG1 FAQ
1.How can I place an order for AP9101CAK-BATRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-BATRG1 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-BATRG1 reliable?
The price and inventory of AP9101CAK-BATRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-BATRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-BATRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-BATRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-BATRG1?
AP9101CAK-BATRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-BATRG1 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-BATRG1?
For technical support, including AP9101CAK-BATRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-BATRG1 requirements.
6.How does Aetrix verify that AP9101CAK-BATRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-BATRG1 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-BATRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-BATRG1?
All AP9101CAK-BATRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-BATRG1, 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-BATRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-BATRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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