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Diodes Incorporated AP9101CAK-ALTRG1
- Part No.:
- AP9101CAK-ALTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-ALTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,821
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Product details
Overview
AP9101CAK-ALTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.275V ±25mV, overdischarge detection at 2.300V ±35mV, discharge overcurrent detection at 0.180V ±15mV, and integrated 8.0V overvoltage charger protection. It drives external N-channel MOSFETs via dedicated CO and DO pins and supports selectable power-down mode and 0V battery charge function.
For engineers reviewing the AP9101CAK-ALTRG1 datasheet, AP9101CAK-ALTRG1 pinout, AP9101CAK-ALTRG1 application, or AP9101CAK-ALTRG1 equivalent, this device serves as a precision, low-quiescent-current solution for portable Li+ battery safety in space-constrained consumer and industrial systems requiring stable voltage thresholds and fixed-delay fault response without external timing capacitors.
Technical Context
The AP9101CAK-ALTRG1 implements independent analog comparators with built-in hysteresis for overcharge (4.275V/4.175V), overdischarge (2.300V/2.400V), and overcurrent conditions, each paired with fixed internal delay timers (e.g., tCU = 1.0s typ, tDOC = 12ms typ). Its VM pin monitors current-sense voltage across an external resistor to detect charge/discharge faults while maintaining high-voltage tolerance (30V max between VDD and VM).
It uses a high-voltage CMOS process enabling direct connection to battery terminals up to 5.5V supply, with dual gate-drive outputs (CO/DO) that sink/source sufficient current (RCOH/RCOL ≤10kΩ) to switch discrete N-MOSFETs. The device operates across –40°C to +85°C and includes factory-configurable options: power-down mode selectability and 0V battery charge enable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.275V ±25mV - triggers CO pin low after 1.0s delay to disable charging when cell exceeds safe voltage |
| Overdischarge Detection Voltage | 2.300V ±35mV - triggers DO pin low after 100ms delay to halt discharge before deep cell depletion |
| Discharge Overcurrent Threshold | 0.180V ±15mV - detects excessive load current via VM–VSS voltage drop, disabling discharge path |
| Quiescent Current (Operation) | 3.0µA typ at 3.5V - enables multi-year battery shelf life in always-connected protection circuits |
| VDD–VM Absolute Max Rating | 30V - supports direct integration into 1-cell Li+ systems with transient charger voltage spikes |
| 0V Battery Charge Function | Enabled - permits recovery of fully depleted cells by allowing charger activation below 1.2V battery voltage |
| Power-Down Mode | Selectable - reduces current to 0.1µA typ during overdischarge, requiring charger wake-up |
Pinout & Package
AP9101CAK-ALTRG1 is packaged in SOT25 (5-pin) with lead-free, RoHS-compliant construction. Pin 1 is marked; no NC pin in SOT25 configuration.
| 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 terminal; powers internal circuitry and provides reference for all voltage detection functions |
| VSS | Negative supply ground | System ground reference for all analog comparators and logic; tied to battery negative terminal |
| DO | Discharge control output | Drives gate of external N-MOSFET to disconnect load during overdischarge, overcurrent, or short-circuit faults |
| CO | Charge control output | Drives gate of external N-MOSFET to disconnect charger during overcharge, charge overcurrent, or overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Fixed internal delay timers | Eliminates need for external timing capacitors-reduces BOM count and PCB area in compact battery packs |
| ±25mV overcharge voltage accuracy | Enables tight cell voltage margin control, extending cycle life and preventing thermal runaway in Li+ cells |
| 0.1µA power-down current | Preserves battery capacity during long-term storage or transport without compromising protection readiness |
| 30V VDD–VM rating | Allows direct interface with unregulated chargers and withstands common automotive or adapter transients |
| Factory-configurable 0V charge | Permits full recovery of self-discharged batteries without manual reset or external circuitry |
Applications
| Smart Wearables | Bluetooth Headsets |
|---|---|
|
Use Scenario: Compact Li+ battery pack powering fitness tracker with BLE connectivity and motion sensors. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage, current, and charger overvoltage in real time. Use Value: Prevents unsafe charging above 4.275V and disables discharge below 2.300V, ensuring >500-cycle longevity under variable load profiles. |
Use Scenario: Dual-earbud system with case-based charging and individual earbud battery management. IC Role / Device Role / Timing Role: Standalone protection IC per earbud, enforcing fast-acting (12ms) short-circuit cutoff on VM pin. Use Value: Enables sub-10ms fault isolation during accidental earbud shorting, avoiding thermal damage and preserving audio functionality. |
| Portable Medical Sensors | USB-C Power Bank Modules |
|
Use Scenario: Single-use glucose monitor with disposable 1-cell Li+ battery and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Low-power protector enabling 0V battery recharge after shelf storage and maintaining <3µA standby draw. Use Value: Guarantees first-use reliability after 24-month shelf life without pre-charge conditioning or user intervention. |
Use Scenario: 10,000mAh power bank using parallel 1-cell Li+ configuration with USB-C PD input. IC Role / Device Role / Timing Role: Per-cell protector handling 8.0V overvoltage detection during 9V/12V PD fast-charge events. Use Value: Blocks charger MOSFET within microseconds if input exceeds 8.0V, protecting cells from overvoltage stress during dynamic PD negotiation. |
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 4.250V overcharge threshold; no overvoltage charger detection; 1.5µA operation current | Lacks 8.0V charger overvoltage protection and 0V charge function; requires external capacitor for delay timing | Choose for ultra-low-power designs where charger overvoltage risk is absent and cost minimization is critical |
| Ricoh RP502K001B-TR-F | 4.280V overcharge threshold; includes temperature monitoring; 2.0µA operation current | Requires external thermistor interface; supports thermal cutoff but adds component count and layout complexity | Choose when cell temperature supervision is mandatory and board space allows for additional sensing components |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, AP9101CAK-ALTRG1 delivers integrated overvoltage charger protection and factory-enabled 0V charge without external components-making it optimal for compact, cost-sensitive, and field-reliable 1-cell Li+ systems where charger compatibility and deep-discharge recovery are design requirements.
Availability
AP9101CAK-ALTRG1 is available at Aetrix Electronics and suitable for smart wearables, Bluetooth headsets, portable medical sensors, and USB-C power bank modules requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for AP9101CAK-ALTRG1 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 power management, signal integrity, and protection solutions for high-volume industrial and consumer markets.
The AP9101C series belongs to Diodes' battery protection IC product line, designed specifically for reliable, low-component-count safety management in 1-cell lithium-ion and lithium-polymer battery packs used in portable electronics.
FAQ
What is the function of the VM pin on AP9101CAK-ALTRG1?
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 operates with ±15mV accuracy at 0.180V threshold and supports up to 30V differential voltage relative to VDD, enabling robust fault detection without additional amplification circuitry.
Does AP9101CAK-ALTRG1 support automatic recovery from overdischarge without a charger?
No-AP9101CAK-ALTRG1 uses the selectable power-down mode (enabled by default), which requires charger connection to exit overdischarge state. Unlike auto-wake-up variants (e.g., AP9101CA), this part enters ultra-low-current sleep (0.1µA) during overdischarge and cannot self-activate without external charging voltage applied to VDD.
How does the 8.0V overvoltage charger detection work?
The overvoltage charger detection monitors voltage between VDD and VM pins. When this differential exceeds 8.0V (±2V), the CO pin immediately goes low to disable the charge MOSFET-no delay is applied. Recovery occurs when the voltage drops below 7.3V (±2V), restoring CO high to re-enable charging, providing instantaneous protection against faulty or mismatched chargers.
Can AP9101CAK-ALTRG1 be used with 2-cell battery configurations?
No-it is strictly rated for 1-cell Li+ systems with maximum VDD–VSS operating range of 1.5V to 5.5V. Applying higher voltages risks permanent damage. For 2-cell applications, Diodes offers the AP9102 series, which supports up to 8.4V total pack voltage and includes dual-cell balancing interfaces not present in AP9101C.
AP9101CAK-ALTRG1 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
AP9101CAK-ALTRG1 FAQ
1.How can I place an order for AP9101CAK-ALTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-ALTRG1 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-ALTRG1 reliable?
The price and inventory of AP9101CAK-ALTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-ALTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-ALTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-ALTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-ALTRG1?
AP9101CAK-ALTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-ALTRG1 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-ALTRG1?
For technical support, including AP9101CAK-ALTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-ALTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-ALTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-ALTRG1 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-ALTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-ALTRG1?
All AP9101CAK-ALTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-ALTRG1, 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-ALTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-ALTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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