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Diodes Incorporated AP9101CAK-BSTRG1
- Part No.:
- AP9101CAK-BSTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-BSTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
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Product details
Overview
AP9101CAK-BSTRG1 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 built-in 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-BSTRG1 datasheet, AP9101CAK-BSTRG1 pinout, AP9101CAK-BSTRG1 application, or AP9101CAK-BSTRG1 equivalent, this page delivers verified voltage thresholds, confirmed SOT25 package mapping, validated terminal functions (VM/VDD/VSS/DO/CO), and real-world protection timing behavior - all critical for BMS layout validation and safety-critical firmware integration.
Technical Context
The AP9101CAK-BSTRG1 integrates high-precision analog comparators for five independent fault conditions: overcharge (VCU = 4.375V), overdischarge (VDL = 2.500V), discharge overcurrent (VDOC = 0.150V), short-circuit (VSHORT = 0.700V), and charge overcurrent (VCOC = −0.150V). Each detection path includes ±20% delay time accuracy and hysteresis control.
Its dual-MOSFET gate drive architecture uses separate CO (charge control) and DO (discharge control) outputs with 2–10kΩ on-resistance, while VM pin senses current-sense voltage across R2 with internal RVMS/RVMD resistors enabling automatic status recovery without external logic. The device operates from 1.5V to 5.5V supply and withstands up to 30V between VDD and VM pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375V ±25mV - sets precise upper cell voltage limit before CO pin disables charge FET |
| Overdischarge Detection Voltage | 2.500V ±35mV - triggers DO pin shutdown to prevent deep discharge damage |
| Discharge Overcurrent Threshold | 0.150V ±15mV - detects excessive load current via sense resistor voltage drop |
| Short-Circuit Detection Voltage | 0.700V ±100mV - enables sub-microsecond response to hard shorts at battery terminals |
| Operating Current (Typ) | 3.0µA at 3.5V - enables multi-year runtime in always-on battery monitoring systems |
| VDD–VM Absolute Max | 30V - supports direct connection to high-voltage chargers without level-shifting circuitry |
| Package | SOT25 - 5-pin surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
The AP9101CAK-BSTRG1 is housed in a RoHS-compliant, lead-free SOT25 package (2.9mm × 1.6mm × 1.1mm) with gull-wing leads and exposed pad thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VM) | Current Sense Input | Monitors voltage drop across external R2 to detect charge/discharge current magnitude and direction |
| 2 (VDD) | Positive Supply Input | Connects to battery positive terminal; powers internal circuitry and drives CO/DO outputs |
| 3 (VSS) | Negative Supply Reference | System ground reference for all analog comparators and digital logic |
| 4 (DO) | Discharge Control Output | Drives gate of external N-MOSFET to interrupt discharge path during overdischarge or overcurrent |
| 5 (CO) | Charge Control Output | Drives gate of external N-MOSFET to interrupt charge path during overcharge or charge overcurrent |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Delay Timing Circuit | Eliminates need for external timing capacitors - reduces BOM count and PCB area by ≥2 components |
| 0V Battery Charge Function | Enables safe recharge of deeply depleted cells (0V) without manual reset or external wake-up circuitry |
| Selectable Power-Down Mode | Reduces quiescent current to 0.1µA typ - extends shelf life of sealed battery packs pre-deployment |
| High-Voltage CMOS Process | Supports 30V VDD–VM differential - allows direct integration with fast-charging adapters up to 12V input |
| Auto-Release Overcharge Protection | Automatically re-enables charging when cell voltage drops below 4.175V - eliminates manual intervention after overvoltage event |
Applications
| Power Tools | Wireless Headsets |
|---|---|
Use Scenario: Cordless drill battery pack subjected to repeated high-current bursts (≥10A) and rapid voltage transients during motor stall. IC Role / Device Role / Timing Role: Primary protection controller monitoring VDD–VSS and VM–VSS to disable discharge FET within 14ms if VDL < 2.500V or VDOC > 0.150V. Use Value: Prevents irreversible cathode degradation and thermal runaway by enforcing strict voltage/current limits during aggressive usage. | Use Scenario: Compact Bluetooth earbud battery exposed to frequent shallow cycling, temperature drift, and accidental shorting during pocket insertion. IC Role / Device Role / Timing Role: Dual-threshold protector detecting both overdischarge (2.500V) and short-circuit (0.700V) with 0.6–1.4µs response window. Use Value: Enables ultra-low standby current (3.0µA) while guaranteeing sub-millisecond short-circuit cutoff - preserving battery capacity and user safety. |
| Wearable Medical Monitors | Smart Lock Batteries |
Use Scenario: Continuous glucose monitor powered by sealed 1-cell LiPo, requiring >2-year operational life and zero field failures due to undervoltage. IC Role / Device Role / Timing Role: Precision voltage supervisor using ±35mV overdischarge accuracy and auto-wake-up mode to resume operation when charger reconnects. Use Value: Eliminates false shutdowns caused by measurement drift, ensuring uninterrupted clinical data logging even after extended storage. | Use Scenario: Smart door lock with infrequent but mission-critical actuation, where battery must retain charge for ≥12 months in standby and respond instantly to RF commands. IC Role / Device Role / Timing Role: Low-power protector with 0.1µA power-down mode and 0V charge enable - maintains readiness without periodic maintenance. Use Value: Guarantees first-use reliability after long-term storage by permitting full recharge from 0V without external intervention. |
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-8261AAB-M6T1U | Fixed 4.25V overcharge threshold; no selectable 0V charge function; requires external timing capacitor | Lacks auto-wake-up and 0V charge - unsuitable for sealed, maintenance-free deployments | Choose only if fixed 4.25V threshold matches legacy battery chemistry and external cap placement is acceptable |
| Ricoh RP502K001B-TR-F | Higher 5.5µA operating current; ±50mV overdischarge accuracy; no overvoltage charger detection | Reduced runtime in low-power wearables; no protection against faulty high-voltage chargers | Select when cost sensitivity outweighs precision and charger-side fault coverage requirements |
Compared with S-8261AAB-M6T1U and RP502K001B-TR-F, the AP9101CAK-BSTRG1 provides tighter voltage tolerances (±25mV vs. ±50mV), integrated timing (no cap), and dual-layer charger protection (8.0V overvoltage + 0V charge enable) - making it optimal for next-generation compact, long-life, and safety-certifiable battery systems.
Availability
AP9101CAK-BSTRG1 is available at Aetrix Electronics and suitable for power tools, wireless headsets, wearable medical monitors, and smart lock batteries requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/Green compliance.
Supply support for AP9101CAK-BSTRG1 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US and ISO/TS 16949-certified wafer fabrication facilities.
The AP9101C 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 integrated fault recovery are mandatory.
FAQ
What is the function of the VM pin on the AP9101CAK-BSTRG1?
The VM pin serves as the current-sense input that measures the voltage difference between the battery's P− node and system ground. It interfaces directly with an external sense resistor (R2) to detect charge/discharge current magnitude and polarity. Internal resistors RVMS and RVMD connect dynamically during fault states to pull VM toward VSS or VDD, enabling automatic recovery without external circuitry.
Does the AP9101CAK-BSTRG1 support both overcharge and overvoltage charger protection?
Yes. It provides dual-layer charger protection: overcharge detection monitors VDD–VSS voltage (4.375V threshold), while overvoltage charger detection independently monitors VDD–VM voltage (8.0V threshold). The latter protects against faulty or mismatched chargers delivering excessive voltage to the battery terminals, triggering CO pin shutdown without delay.
Can the AP9101CAK-BSTRG1 recover from overdischarge without a charger connected?
Yes - in its factory-configured auto-wake-up mode (denoted by "A" in part number suffix), the AP9101CAK-BSTRG1 exits overdischarge state when either the battery voltage rises above 2.900V (VDU) or remains above that threshold for the overdischarge release delay time. This eliminates dependency on external charging for system reactivation in sealed or inaccessible battery assemblies.
How does the 0V battery charge function operate in practice?
When enabled (factory-set in AP9101CAK-BSTRG1), the 0V charge function allows the IC to activate its internal regulators and comparators even when the battery voltage is 0V, permitting the charger to begin trickle charging. This occurs without manual reset or external wake-up signal - critical for consumer devices left unused for extended periods where self-discharge reaches 0V.
AP9101CAK-BSTRG1 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-BSTRG1 FAQ
1.How can I place an order for AP9101CAK-BSTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-BSTRG1 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-BSTRG1 reliable?
The price and inventory of AP9101CAK-BSTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-BSTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-BSTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-BSTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-BSTRG1?
AP9101CAK-BSTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-BSTRG1 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-BSTRG1?
For technical support, including AP9101CAK-BSTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-BSTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-BSTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-BSTRG1 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-BSTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-BSTRG1?
All AP9101CAK-BSTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-BSTRG1, 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-BSTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-BSTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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