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Diodes Incorporated AP9101CAK-BGTRG1
- Part No.:
- AP9101CAK-BGTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CAK-BGTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
AP9101CAK-BGTRG1 from Diodes Incorporated is a single-chip lithium-ion battery protection IC for 1-cell packs, featuring overcharge detection at 4.375 V ±25 mV, overdischarge detection at 2.500 V ±35 mV, discharge overcurrent detection at 0.150 V ±15 mV, and integrated fixed-delay timing with no external capacitor required. It controls external N-channel MOSFETs via dedicated CO and DO pins to enforce safety cutoffs in portable power tools, Bluetooth headsets, and wearable medical monitors.
For engineers reviewing the AP9101CAK-BGTRG1 datasheet, AP9101CAK-BGTRG1 pinout, AP9101CAK-BGTRG1 application, or AP9101CAK-BGTRG1 equivalent, this device delivers precision voltage monitoring, selectable 0V-charge capability, auto-release overcharge protection, and ultra-low 3.0 µA operating current - critical for long-life, space-constrained Li+ battery management systems.
Technical Context
The AP9101CAK-BGTRG1 implements independent high-accuracy comparators for VDD–VSS (cell voltage) and VM–VSS (current-sense voltage), with built-in hysteresis and fixed delay timers for all protection events. Its logic circuitry enforces strict state transitions between Normal, Overcharge, Overdischarge, Discharge Overcurrent, Short-Circuit, and Charge Overcurrent modes without external timing components.
It supports dual operation modes: Power-Down (0.01 µA standby) and Auto-Wake-Up (5.5 µA max), and includes an overvoltage charger detector (8.0 V ±2 V) that acts directly on the CO pin with zero delay. The VM pin interfaces to a sense resistor (R2 = 2.7 kΩ typical) to monitor bidirectional current flow while maintaining high-voltage tolerance (30 V between VDD and VM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375 V ±25 mV - triggers CO pin low after tCU delay to halt charging before cell damage |
| Overdischarge Detection Voltage | 2.500 V ±35 mV - initiates DO pin low cutoff to prevent irreversible capacity loss |
| Discharge Overcurrent Threshold | 0.150 V ±15 mV - detects >1.5 A through 100 mΩ sense resistor before thermal runaway |
| Operating Current | 3.0 µA typ at 3.5 V - enables multi-year runtime in always-on battery packs |
| VM–VSS Sense Range | −0.32 V to +0.70 V - supports bidirectional current monitoring for charge/discharge control |
| CO/DO Output Drive | RCOH = 6 kΩ typ, RCOL = 4 kΩ typ - directly drives standard N-MOSFET gates without buffer stages |
| Supply Voltage Range | 1.5 V to 5.5 V - operates across full Li+ cell voltage range (2.5–4.2 V) plus margin |
Pinout & Package
AP9101CAK-BGTRG1 is housed in a RoHS-compliant SOT25 package (5-pin, 2.9 mm × 1.6 mm × 1.1 mm), optimized for compact battery pack PCB layouts with exposed pad thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VM | Current-sense input | Monitors voltage drop across external sense resistor (R2) to detect charge/discharge current direction and magnitude |
| 2: VDD | Positive supply input | Connects to battery positive terminal; powers internal circuitry and provides reference for VM sensing |
| 3: VSS | Negative supply ground | System ground reference for all comparators and logic; tied to battery negative and R2 low-side |
| 4: DO | Discharge control output | Drives gate of discharge N-MOSFET (Q1); low = disable discharge path during overdischarge or overcurrent |
| 5: CO | Charge control output | Drives gate of charge N-MOSFET (Q2); low = disable charge path during overcharge, overcurrent, or overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-time protection delay | No external capacitor needed - reduces BOM count and layout area by eliminating timing RC networks |
| Selectable 0V battery charge | Factory-configured "Available" - enables recovery of deeply discharged cells without manual pre-charge intervention |
| Auto-release overcharge mode | Self-resets when cell voltage drops below 4.175 V - avoids permanent lockout and supports cyclic charging |
| High-voltage VM interface | Withstands up to 30 V differential between VDD and VM - accommodates high-side sensing or charger fault transients |
| Ultra-low power-down current | 0.01 µA typ - extends shelf life of sealed battery packs during storage or transport |
Applications
| Power Tools | Wireless Headsets |
|---|---|
|
Use Scenario: Cordless drill with 1-cell 3.7 V Li+ battery subjected to intermittent high-current bursts (>10 A) and thermal cycling. IC Role / Device Role / Timing Role: Primary protection controller enforcing overdischarge cutoff at 2.500 V and discharge overcurrent limit at 0.150 V within 10 ms. Use Value: Prevents cell swelling and capacity fade by halting discharge before voltage collapse, enabling >500-cycle tool lifespan. |
Use Scenario: Compact Bluetooth earbuds requiring 24-month shelf life and reliable reactivation after deep self-discharge. IC Role / Device Role / Timing Role: Battery supervisor with 0V-charge enable and 0.01 µA power-down mode to preserve charge during storage. Use Value: Eliminates need for user-initiated "wake-up" charging; devices power on immediately after first charge attempt. |
| Wearable Medical Monitors | Smart Pens |
|
Use Scenario: FDA-cleared glucose sensor worn continuously for 14 days, powered by sealed 1-cell Li+ battery. IC Role / Device Role / Timing Role: Safety-critical protector with ±25 mV overcharge accuracy and overvoltage charger detection (8.0 V) to block unsafe chargers. Use Value: Ensures compliance with IEC 62368-1 clause 6.2.2 by preventing thermal runaway under charger fault conditions. |
Use Scenario: Digitally enabled stylus with capacitive tip, requiring stable 3.3 V rail and minimal quiescent drain. IC Role / Device Role / Timing Role: Low-power pack manager using 3.0 µA operating current and auto-wake-up to maintain real-time clock during sleep. Use Value: Extends active usage time to >100 hours per charge while supporting firmware updates via USB-C charging. |
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 |
|---|---|---|---|
| Seiko Instruments S-8261AAB-M6T1U | Fixed 4.25 V overcharge threshold; no 0V-charge option; requires external capacitor for delay timing | Lacks auto-wake-up and overvoltage charger detection; suited only for cost-sensitive, non-recoverable packs | Choose only if design uses fixed thresholds and accepts higher BOM count due to external timing cap |
| Ricoh RP507K001B-TR-F | Supports 2-cell configuration; higher 5.0 V overcharge detection; 1.2 µA operating current but no 0V-charge function | Designed for multi-cell stacks; incompatible pinout and voltage scaling for 1-cell use | Not suitable as drop-in replacement; requires PCB redesign and recalibration of sense resistor network |
Compared with S-8261AAB-M6T1U and RP507K001B-TR-F, AP9101CAK-BGTRG1 uniquely combines factory-programmed 0V-charge enable, zero-capacitor timing, and overvoltage charger detection - making it the only option for compact, field-recoverable 1-cell Li+ packs demanding both safety and usability.
Availability
AP9101CAK-BGTRG1 is available at Aetrix Electronics and suitable for power tools, wireless headsets, wearable medical monitors, and smart pens requiring stable component supply, long-term lifecycle support, and guaranteed green/RoHS compliance.
Supply support for AP9101CAK-BGTRG1 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 company specializing in discrete, analog, and mixed-signal ICs, with manufacturing certified to IATF 16949 and product compliance to AEC-Q200 standards.
The AP9101C series belongs to Diodes' Battery Management Solutions product line, engineered specifically for high-accuracy, low-quiescent-current protection of single-cell Li-ion and Li-polymer battery packs in consumer and portable industrial applications.
FAQ
What is the function of the VM pin on AP9101CAK-BGTRG1?
The VM pin serves as the bidirectional current-sense input, measuring voltage drop across an external sense resistor (R2) to detect both charge and discharge currents. It connects between the battery's P− node and the source of the discharge MOSFET, enabling the IC to distinguish polarity and trigger DO or CO cutoff based on direction and magnitude - critical for accurate overcurrent and short-circuit protection.
Does AP9101CAK-BGTRG1 support automatic recovery from overdischarge?
Yes - AP9101CAK-BGTRG1 features Auto-Wake-Up functionality (indicated by "A" in part number suffix), allowing recovery from overdischarge when battery voltage rises above the release threshold (2.900 V) without requiring external charger connection. This differs from Power-Down mode versions, which mandate charger presence to exit overdischarge state.
Can AP9101CAK-BGTRG1 be used with 2-cell battery configurations?
No - AP9101CAK-BGTRG1 is strictly designed for 1-cell Li+ or Li-polymer batteries with maximum VDD–VSS operating range of 1.5 V to 5.5 V. Its overcharge detection (4.375 V) and overvoltage charger threshold (8.0 V) are calibrated for single-cell voltage profiles; using it in 2-cell stacks risks undervoltage cutoff or false overvoltage trips.
How does the overvoltage charger detection feature operate?
The overvoltage charger detector monitors voltage between VDD and VM pins. When this differential exceeds 8.0 V (±2 V), the CO pin is driven low immediately - no delay - to disable the charge MOSFET. Recovery occurs when the differential falls below 7.3 V (±2 V), restoring CO high. This protects against faulty or mismatched chargers without relying on cell voltage feedback.
AP9101CAK-BGTRG1 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-BGTRG1 FAQ
1.How can I place an order for AP9101CAK-BGTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CAK-BGTRG1 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-BGTRG1 reliable?
The price and inventory of AP9101CAK-BGTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CAK-BGTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CAK-BGTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CAK-BGTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CAK-BGTRG1?
AP9101CAK-BGTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CAK-BGTRG1 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-BGTRG1?
For technical support, including AP9101CAK-BGTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CAK-BGTRG1 requirements.
6.How does Aetrix verify that AP9101CAK-BGTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CAK-BGTRG1 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-BGTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CAK-BGTRG1?
All AP9101CAK-BGTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CAK-BGTRG1, 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-BGTRG1 part is unused and in its original packaging.
Return procedure for AP9101CAK-BGTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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