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Diodes Incorporated AP9101CAK-BITRG1
- Part No.:
- AP9101CAK-BITRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-BITRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,414
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Product details
Overview
AP9101CAK-BITRG1 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 devices.
For engineers reviewing the AP9101CAK-BITRG1 datasheet, AP9101CAK-BITRG1 pinout, AP9101CAK-BITRG1 application, or AP9101CAK-BITRG1 equivalent, this page delivers verified voltage thresholds, confirmed SOT25 package mapping, validated CO/DO gate control behavior, and real-world timing delay tolerances per DS37771 Rev. 8-3.
Technical Context
The AP9101CAK-BITRG1 implements independent analog comparators for VDD–VSS (cell voltage) and VM–VSS (current-sense voltage), each feeding into configurable delay timers with ±20% accuracy at +25°C. Its logic circuit enforces auto-release overcharge protection and supports selectable 0V battery charging and power-down mode.
It uses high-voltage CMOS process technology enabling 30V differential rating between VDD and VM pins, while internal RVMD/RVMS resistors (300kΩ typ between VM–VDD and 30kΩ typ between VM–VSS) enable automatic status recovery without external biasing during overdischarge or 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 disable charge FET when cell exceeds safe voltage |
| Overdischarge Detection Voltage | 2.500V ±35mV - triggers DO pin low after tDL delay to disable discharge FET when cell depletes below safe threshold |
| Discharge Overcurrent Threshold | 0.150V ±15mV - detects excessive load current via VM–VSS sense voltage, initiating DO shutdown |
| Operating Current (Typ) | 3.0µA at VDD=3.5V - enables multi-year battery standby life in always-on portable systems |
| Power-Down Current (Typ) | 0.01µA - reduces quiescent draw during storage or deep sleep, activated by factory option |
| VDD–VM Absolute Max | 30V - supports robust operation across wide charger input transients without external clamping |
| 0V Battery Charge | Enabled - allows reactivation of deeply discharged cells (0V) using standard CC/CV chargers |
Pinout & Package
AP9101CAK-BITRG1 is supplied in the SOT25 (5-pin) surface-mount package, with pin 1 marked and lead-free, RoHS-compliant construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM | Current-sense input | Monitors voltage drop across external sense resistor (R2) to detect charge/discharge overcurrent and short-circuit conditions |
| VDD | Positive supply input | Connects to battery positive terminal; powers internal circuitry and drives CO/DO gate outputs |
| VSS | Negative supply reference | System ground reference for all voltage comparisons and logic levels |
| DO | Discharge control output | Drives gate of external discharge N-MOSFET; high = on, low = off during overdischarge or overcurrent |
| CO | Charge control output | Drives gate of external charge N-MOSFET; high = on, low = off during overcharge, overvoltage charger, or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| No external timing capacitors | Built-in fixed delay circuit eliminates need for external capacitor, reducing BOM count and PCB area |
| High-accuracy voltage detection | ±25mV overcharge and ±35mV overdischarge thresholds ensure precise cell voltage management within Li+ safety limits |
| Integrated 0V battery charge | Enables recovery of fully depleted cells without requiring special pre-charge circuits or firmware intervention |
| Selectable power-down mode | Factory-configured option reduces current to 0.01µA typ, extending shelf life for battery packs in long-term storage |
| Overvoltage charger protection | Detects >8.0V between VDD and VM (±2V), disabling charge FET instantly to prevent damage from faulty or mismatched chargers |
Applications
| Wireless Earbuds | Portable Medical Monitors |
|---|---|
|
Use Scenario: Compact dual-battery earbud case with USB-C charging and Bluetooth telemetry. IC Role / Device Role / Timing Role: Primary protection IC monitoring single 3.7V Li+ cell; asserts DO/CO within 120ms (tDL/tCU typ) to isolate cell during fault. Use Value: Prevents thermal runaway during accidental overcharge or short-circuit in sealed enclosure with no user-serviceable components. |
Use Scenario: Battery-powered ECG patch worn continuously for 72-hour ambulatory monitoring. IC Role / Device Role / Timing Role: Ensures cell remains within 2.5–4.375V window during repeated charge cycles; enables 0V recovery after patient forgets to recharge. Use Value: Guarantees uninterrupted clinical data capture by avoiding irreversible cell lockout due to self-discharge during idle periods. |
| Power Tool Battery Packs | Smart Home Sensors |
|
Use Scenario: 18V cordless drill battery pack with high-current discharge (≥20A) and fast-charging capability. IC Role / Device Role / Timing Role: Detects 0.150V VM–VSS drop (≈15mΩ sense resistor) to trigger DO shutdown within 10ms (tDOC typ) during stall or jam. Use Value: Protects MOSFETs and cell from destructive energy dissipation during motor lock-up, preserving tool reliability and warranty integrity. |
Use Scenario: Zigbee-enabled door/window sensor powered by CR2032-equivalent Li+ coin cell with 5-year target lifetime. IC Role / Device Role / Timing Role: Maintains 3.0µA operating current and 0.01µA power-down state to maximize calendar life; manages low-voltage cutoff at 2.500V. Use Value: Eliminates premature end-of-life failures caused by undervoltage stress, ensuring consistent RF transmission range over full service life. |
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 0V charge function; requires external timing capacitor | Lacks auto-wake-up and 0V recovery; suited only for cost-sensitive, non-recoverable consumer packs | Choose only if design accepts mandatory external capacitor and does not require deep-discharge recovery |
| Ricoh RP502K001B-TR-F | Supports 2-cell configuration; higher 5.0V overvoltage clamp; 5.5µA typical operating current | Designed for multi-cell stacks; unsuitable for 1-cell footprint or ultra-low-quiescent designs | Select only when scaling to 2S topology or needing higher charger fault tolerance than 8.0V |
Compared with S-8261AAL-M6T1U and RP502K001B-TR-F, the AP9101CAK-BITRG1 uniquely combines factory-programmed precision thresholds, zero-external-timing architecture, and 0V battery charge-enabling smaller, safer, and more field-reliable 1-cell Li+ systems without design compromises.
Availability
AP9101CAK-BITRG1 is available at Aetrix Electronics and suitable for wireless earbuds, portable medical monitors, and power tool battery packs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/Green compliance.
Supply support for AP9101CAK-BITRG1 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, engineered specifically for space-constrained, high-reliability 1-cell Li+ applications where precision voltage monitoring, ultra-low quiescent current, and robust fault response are critical.
FAQ
What is the function of the VM pin on AP9101CAK-BITRG1?
The VM pin serves as the current-sense input, measuring voltage drop across an external sense resistor (R2) between battery negative and system ground. It enables detection of discharge overcurrent, charge overcurrent, and short-circuit events by comparing VM–VSS against programmable thresholds (0.05–0.32V for discharge, –0.2 to –0.05V for charge). Internal RVMS/RVMD resistors automatically bias VM during fault recovery.
Does AP9101CAK-BITRG1 support both overcharge and overvoltage charger protection?
Yes. Overcharge protection monitors VDD–VSS (cell voltage) with 4.375V detection and 4.175V release thresholds. Separately, overvoltage charger protection monitors VDD–VM (charger input) with 8.0V detection and 7.3V release thresholds-triggering immediate CO pin shutdown without delay to guard against incompatible or faulty chargers.
How does the 0V battery charge function operate in AP9101CAK-BITRG1?
The 0V battery charge function is factory-enabled in this variant. When battery voltage reaches 0V due to self-discharge, the IC permits charger connection to initiate trickle charge once VDD rises above 1.2V. This avoids permanent lockout and enables full recovery without manual reset or external circuitry, verified per DS37771 Section 6.
Can AP9101CAK-BITRG1 be used in automotive applications?
No. While rated for –40°C to +85°C operation, AP9101CAK-BITRG1 is not qualified to AEC-Q100 or IATF 16949 standards. Diodes Incorporated explicitly states that automotive-grade variants require separate qualification, PPAP capability, and manufacturing in certified facilities-none of which apply to this part number per DS37771 footnote.
AP9101CAK-BITRG1 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-BITRG1 FAQ
1.How can I place an order for AP9101CAK-BITRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-BITRG1 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-BITRG1 reliable?
The price and inventory of AP9101CAK-BITRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-BITRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-BITRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-BITRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-BITRG1?
AP9101CAK-BITRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-BITRG1 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-BITRG1?
For technical support, including AP9101CAK-BITRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-BITRG1 requirements.
6.How does Aetrix verify that AP9101CAK-BITRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-BITRG1 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-BITRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-BITRG1?
All AP9101CAK-BITRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-BITRG1, 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-BITRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-BITRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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