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Diodes Incorporated AP9101CAK-BQTRG1
- Part No.:
- AP9101CAK-BQTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-BQTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,104
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Product details
Overview
AP9101CAK-BQTRG1 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, built-in fixed delay timing, and SOT25 package with 5-pin configuration. It controls external MOSFETs to halt charging or discharging during fault conditions in portable power tools and medical handheld devices.
For engineers reviewing the AP9101CAK-BQTRG1 datasheet, AP9101CAK-BQTRG1 pinout, AP9101CAK-BQTRG1 application, or AP9101CAK-BQTRG1 equivalent, this device supports precise voltage threshold selection, selectable 0V battery charge function, power-down mode control, and high-voltage tolerance (30V between VDD and VM) - critical for robust battery management in space-constrained consumer and industrial systems.
Technical Context
The AP9101CAK-BQTRG1 integrates independent voltage comparators for overcharge (VCU = 4.375V), overdischarge (VDL = 2.500V), and overvoltage charger (VOVCHG = 8.0V), each with configurable hysteresis and ±25–±100mV accuracy. Its logic circuit drives CO and DO outputs to control external N-channel MOSFETs in series with charge and discharge paths.
It uses internal resistance networks (RVMD = 100–650kΩ, RVMS = 5–65kΩ) to sense current via VM pin voltage drop, enabling discharge overcurrent (VDOC = 0.150V), short-circuit (VSHORT = 0.700V), and charge overcurrent (VCOC = −0.150V) detection without external sense resistors. Delay times (tCU, tDL, tDOC) are factory-fixed with ±20% accuracy at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - triggers CO pin low after tCU delay to disable charge path when cell voltage exceeds safe limit |
| Overdischarge Detection Voltage | 2.500V ±35mV - triggers DO pin low after tDL delay to disable discharge path before deep discharge damage |
| Discharge Overcurrent Threshold | 0.150V ±15mV - detects excessive load current via VM–VSS voltage drop across sense resistor |
| Supply Current (Operation) | 3.0µA typical at VDD = 3.5V - enables multi-year runtime in battery-powered standby applications |
| VM–VDD Input Voltage Range | −0.3V to 30V - supports high-side charger monitoring and reverse-polarity resilience |
| Operating Temperature | −40°C to +85°C - validated for use in consumer electronics and industrial portable equipment |
| Package | SOT25 - 5-pin, surface-mount, footprint-compatible with automated PCB assembly |
Pinout & Package
SOT25 package: 5-pin, small-outline transistor, 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VM | Current Sense Input | Monitors voltage drop across external sense resistor between P− and battery negative; enables overcurrent/short-circuit detection |
| 2: VDD | Positive Supply Input | Connects to battery positive terminal; powers internal circuitry and provides reference for all voltage thresholds |
| 3: VSS | Negative Supply Reference | Ground reference for all analog comparators and logic; tied directly to battery negative |
| 4: DO | Discharge Control Output | Drives gate of discharge MOSFET (Q1); high = enabled, low = disabled during overdischarge or overcurrent |
| 5: CO | Charge Control Output | Drives gate of charge MOSFET (Q2); high = enabled, low = disabled during overcharge, overvoltage charger, or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed Voltage Thresholds | VCU = 4.375V, VCL = 4.175V, VDL = 2.500V, VDU = 2.900V, VDOC = 0.150V - eliminates external resistor dividers and calibration effort |
| Selectable 0V Battery Charge Function | Enabled per ordering code (AK) - allows recovery of deeply discharged cells without manual pre-charge intervention |
| Power-Down Mode Control | Configurable via internal option (B = power-down enabled) - reduces quiescent current to 0.1µA for long-term storage protection |
| Integrated Overvoltage Charger Protection | VOVCHG = 8.0V ±2V detection with no delay - safeguards against faulty or mismatched chargers in end-user environments |
| High-Voltage CMOS Process | 30V VDD–VM rating - accommodates transient surges and enables direct connection to unregulated charger inputs |
Applications
| Power Tools | Medical Handheld Devices |
|---|---|
Use Scenario: Cordless drill/driver with 1-cell Li-ion pack subject to high pulse currents and thermal stress during operation. IC Role / Device Role / Timing Role: Battery protection IC monitoring cell voltage, charge/discharge current, and charger input voltage to prevent overcharge, overdischarge, and short-circuit faults. Use Value: Prevents thermal runaway and capacity degradation by enforcing precise 4.375V overcharge cutoff and 0.150V discharge overcurrent limit under dynamic load. |
Use Scenario: Portable ultrasound or glucose monitor requiring reliable, long-life battery operation with zero-failure safety compliance. IC Role / Device Role / Timing Role: Primary protection controller ensuring cell stays within JEDEC JESD22-A108 qualified voltage and current limits during clinical use and storage. Use Value: Enables 0V battery charge recovery and ultra-low 0.1µA power-down current to extend shelf life and support FDA-mandated field reliability requirements. |
| Wireless Headphones | Smart Wearables |
Use Scenario: Compact true wireless stereo earbuds with tight board space and strict leakage current budgets. IC Role / Device Role / Timing Role: Single-chip protection solution replacing discrete comparator + timer designs to minimize BOM count and PCB area. Use Value: Reduces component count by eliminating external capacitors for delay timing and external voltage dividers for threshold setting. |
Use Scenario: Fitness tracker with aggressive sleep-mode duty cycling and intermittent high-current sensor bursts. IC Role / Device Role / Timing Role: Fault-monitoring interface between battery and system PMIC, asserting DO/CO signals to isolate power path during abnormal events. Use Value: Provides fast 1µs short-circuit response and ±35mV overdischarge accuracy to preserve cycle life across 500+ charge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protection IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Seiko Instruments S-8261AAB-M6T1U | Fixed 4.25V overcharge threshold; no overvoltage charger detection; requires external capacitor for delay timing | Lacks 8.0V charger overvoltage protection and 0V charge enable - unsuitable for unregulated or third-party charger ecosystems | Choose only if design uses tightly controlled, certified chargers and accepts higher BOM cost for external timing components |
| Ricoh RP502K001B-TR-F | Supports dual-cell configuration; higher 5.0V overcharge threshold; 1.5µA operating current but no power-down mode | Designed for 2S battery stacks; incompatible pinout and voltage range for 1S Li-ion systems using AP9101CAK-BQTRG1 | Select only for multi-cell packs; not drop-in replaceable due to different VM sensing architecture and pin assignment |
Compared with S-8261AAB-M6T1U and RP502K001B-TR-F, the AP9101CAK-BQTRG1 delivers integrated overvoltage charger protection, factory-programmed precision thresholds, and selectable 0V charge - reducing validation effort and improving field reliability in consumer-grade 1-cell battery packs.
Availability
AP9101CAK-BQTRG1 is available at Aetrix Electronics and suitable for power tools, medical handheld devices, wireless headphones, and smart wearables requiring stable component supply, long-lifecycle assurance, and RoHS/Green compliance.
Supply support for AP9101CAK-BQTRG1 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 electronics markets.
The AP9101C belongs to Diodes' battery protection IC product line, engineered specifically for cost-sensitive, space-constrained 1-cell Li-ion/Li-polymer applications demanding high accuracy, low quiescent current, and minimal external components.
FAQ
What is the function of the VM pin on the AP9101CAK-BQTRG1?
The VM pin serves as the current-sense input that monitors the voltage difference between the battery's P− node and VSS. It enables detection of discharge overcurrent (at 0.150V), short-circuit (at 0.700V), and charge overcurrent (at −0.150V) by measuring the drop across an external sense resistor. Internal resistance networks (RVMD/RVMS) connect dynamically during fault states to stabilize sensing and ensure accurate tripping.
Does the AP9101CAK-BQTRG1 support automatic recovery from overdischarge?
Yes - the AP9101CAK-BQTRG1 supports auto-wake-up functionality. When configured with power-down disabled (ordering code 'B'), it remains active in overdischarge state and recovers to normal operation once the battery voltage rises above the overdischarge release voltage (VDU = 2.900V) or after a sustained period exceeding the release delay time. This eliminates need for external wake-up circuitry in wearables and IoT devices.
Can the AP9101CAK-BQTRG1 protect against faulty chargers?
Yes - it includes a dedicated overvoltage charger detection circuit that monitors the voltage between VDD and VM pins. If this exceeds 8.0V (±2V), the CO pin is driven low immediately (no delay) to disconnect the charge MOSFET. Recovery occurs when voltage falls below 7.3V, providing robust defense against non-compliant or damaged wall adapters and USB-PD sources.
Is the AP9101CAK-BQTRG1 pin-compatible with other variants in the AP9101C family?
Yes - all AP9101C variants (including AK, AB, AC, etc.) share identical SOT25 pinout, electrical interface, and functional architecture. Only voltage thresholds, hysteresis values, and optional features (0V charge, power-down) differ per ordering code. This enables design reuse and simplified inventory management across multiple battery configurations.
AP9101CAK-BQTRG1 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-BQTRG1 FAQ
1.How can I place an order for AP9101CAK-BQTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-BQTRG1 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-BQTRG1 reliable?
The price and inventory of AP9101CAK-BQTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-BQTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-BQTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-BQTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-BQTRG1?
AP9101CAK-BQTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-BQTRG1 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-BQTRG1?
For technical support, including AP9101CAK-BQTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-BQTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-BQTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-BQTRG1 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-BQTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-BQTRG1?
All AP9101CAK-BQTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-BQTRG1, 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-BQTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-BQTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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