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Diodes Incorporated AP9101CK-BJTRG1
- Part No.:
- AP9101CK-BJTRG1
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP9101CK-BJTRG1.pdf
- Description:
- IC BATT PROT LI-ION 1CELL SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,341
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Product details
Overview
AP9101CK-BJTRG1 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 built-in fixed delay timing with no external capacitor required. It controls external N-channel MOSFETs via dedicated CO and DO gate drive pins and supports 0V battery charge functionality.
For engineers reviewing the AP9101CK-BJTRG1 datasheet, AP9101CK-BJTRG1 pinout, AP9101CK-BJTRG1 application, or AP9101CK-BJTRG1 equivalent, this device is selected for compact, low-power battery management in portable electronics where precision voltage thresholds, ultra-low quiescent current (3.0 µA typ), and integrated protection logic are critical to safety and runtime.
Technical Context
The AP9101CK-BJTRG1 implements independent voltage and current monitoring paths: VDD–VSS sensing for cell voltage (overcharge/overdischarge), and VM–VSS differential sensing for charge/discharge current (via sense resistor R2). Its logic circuitry uses internal reference trimming and temperature-compensated comparators to maintain accuracy across –40°C to +85°C.
Protection actions are latched with auto-release behavior: overcharge releases when cell voltage drops below 4.175 V, overdischarge releases at 2.900 V, and short-circuit protection resets automatically upon load removal due to RVMS pull-down activation. The device operates with a high-voltage CMOS process enabling up to 30 V between VDD and VM pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Overcharge Detection Voltage | 4.375 V ±25 mV - triggers CO pin low after 1.0×tCU delay to disable charging MOSFET |
| Overdischarge Detection Voltage | 2.500 V ±35 mV - triggers DO pin low after 1.0×tDL delay to disable discharging MOSFET |
| Discharge Overcurrent Threshold | 0.150 V ±15 mV - detects >1.5 A (with 100 mΩ sense resistor) before tDOC timeout disables DO |
| Quiescent Current (Operation) | 3.0 µA typ at VDD = 3.5 V - enables multi-year shelf life in battery-powered devices |
| 0V Battery Charge Support | Enabled - allows charger to initiate recovery of fully depleted cells without manual intervention |
| VM–VDD Input Voltage Range | –0.3 V to 30 V - accommodates high-side charger monitoring without level-shifting circuitry |
| Package | SOT25 - 5-pin surface-mount package with 1.6 mm × 2.9 mm footprint and 1.1 mm height |
Pinout & Package
SOT25 package: 5-pin, small-outline transistor with gull-wing leads, moisture sensitivity level (MSL) 1, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VM | Charger negative input / current sense node | Monitors voltage drop across external sense resistor (R2); connects internally to RVMS/RVMD during fault states |
| 2: VDD | Positive power supply input | Accepts 1.5–5.5 V; powers internal circuitry and drives CO/DO outputs |
| 3: VSS | Negative power supply reference | System ground return; used as reference for all voltage and current detection circuits |
| 4: DO | Discharge control output | Drives gate of discharge MOSFET (Q1); high = on, low = off; RDOH/ RDOL resistances limit slew rate |
| 5: CO | Charge control output | Drives gate of charge MOSFET (Q2); high = on, low = off; RCOH/ RCOL resistances ensure controlled turn-off |
Key Features
| Feature | Design Value |
|---|---|
| Fixed internal delay timers | Eliminates need for external timing capacitors-reduces BOM count and PCB area in space-constrained battery packs |
| Ultra-low power-down current | 0.01 µA typ - extends shelf life of sealed battery modules during long-term storage |
| Selectably enabled 0V charge function | Factory-configured "Permission" option allows safe reactivation of deeply discharged Li+ cells without external wake-up circuitry |
| Overvoltage charger detection | 8.0 V ±2 V threshold on VDD–VM path protects against faulty chargers without added components |
| High-accuracy hysteresis control | ±50 mV overcharge hysteresis (0.200 V window) prevents oscillation near trip points during marginal voltage conditions |
Applications
| Power Tool Battery Packs | Wireless Headphone Charging Cases |
|---|---|
|
Use Scenario: Rechargeable 1-cell Li+ pack powering cordless drills with peak discharge currents up to 20 A. IC Role / Device Role / Timing Role: Primary protection controller monitoring cell voltage, discharge current, and short-circuit events in real time. Use Value: Prevents thermal runaway during high-current operation using 0.150 V overcurrent threshold and sub-10 µs short-circuit response. |
Use Scenario: Compact charging case with integrated 1-cell Li+ battery supplying power to Bluetooth earbuds. IC Role / Device Role / Timing Role: Dual-role protector enabling both charging (via CO) and discharging (via DO) while maintaining <3 µA system standby draw. Use Value: Enables multi-week idle battery life via 0.01 µA power-down mode and precise 2.500 V overdischarge cutoff. |
| Medical Wearable Sensors | Smart Home Remote Controls |
|
Use Scenario: Single-use or rechargeable patch-style vital sign monitor worn continuously for 72+ hours. IC Role / Device Role / Timing Role: Safety-critical voltage supervisor ensuring cell remains within 2.500–4.375 V operating window during intermittent telemetry bursts. Use Value: Guarantees compliance with IEC 62368-1 by enforcing ±25 mV overcharge detection accuracy and auto-release recovery. |
Use Scenario: Energy-harvesting or coin-cell–backed IR remote with embedded rechargeable Li+ backup. IC Role / Device Role / Timing Role: Low-power protector managing trickle charge from energy harvester and preventing deep discharge during infrequent use. Use Value: Supports 0V battery charge initiation and maintains 2.900 V overdischarge release voltage to maximize usable capacity. |
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 4.25 V overcharge threshold; no 0V charge support; requires external timing capacitor | Lacks factory-configurable 0V charge and fixed-delay architecture - less suitable for sealed consumer devices | Prefer AP9101CK-BJTRG1 when 0V recovery, capacitor-free design, or tighter voltage tolerance (±25 mV vs ±50 mV) is required |
| Ricoh RP502K001B-TR-F | Supports 2-cell configuration only; higher 4.45 V overcharge threshold; no overvoltage charger detection | Designed for dual-cell stacks - incompatible with 1-cell topologies and missing VDD–VM monitoring path | AP9101CK-BJTRG1 is mandatory for single-cell systems requiring 30 V VM–VDD tolerance and integrated charger overvoltage protection |
Compared with S-8261AAB-M6T1U and RP502K001B-TR-F, the AP9101CK-BJTRG1 uniquely combines factory-programmed 0V charge enablement, capacitorless timing, and 30 V VM–VDD rating - making it the only qualified solution for compact, maintenance-free 1-cell Li+ packs demanding full safety autonomy.
Availability
AP9101CK-BJTRG1 is available at Aetrix Electronics and suitable for portable medical devices, wireless audio accessories, power tool battery packs, and smart home remotes requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for AP9101CK-BJTRG1 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 solutions, with manufacturing certified to IATF 16949 and product lines compliant with AEC-Q100/101 standards.
The AP9101C series belongs to Diodes' battery protection IC product line, engineered specifically for cost-sensitive, space-constrained 1-cell Li+ applications requiring high-precision voltage monitoring and autonomous fault recovery without external passive components.
FAQ
What is the function of the VM pin on the AP9101CK-BJTRG1?
The VM pin serves as the current-sense input node, measuring voltage drop across an external sense resistor (R2) between the battery's P− terminal and ground. During normal operation, it monitors discharge/charge current magnitude; during faults, internal switches (RVMS/RVMD) connect VM to VSS or VDD to enforce latch-and-reset behavior. Its absolute maximum rating of 30 V enables direct connection to high-side charger rails without attenuation.
Does the AP9101CK-BJTRG1 support automatic recovery from overdischarge?
Yes - the AP9101CK-BJTRG1 implements auto-release overdischarge protection: when battery voltage rises above 2.900 V (VDU), the DO pin returns high to re-enable the discharge MOSFET. This occurs without external intervention, provided the 0V charge function is enabled and no persistent short exists. Recovery is inhibited if VM remains elevated due to load presence, ensuring safe re-engagement only after fault clearance.
How does the AP9101CK-BJTRG1 handle overvoltage conditions on the charger input?
The AP9101CK-BJTRG1 continuously monitors voltage between VDD and VM pins. If this exceeds 8.0 V (±2 V), the CO pin immediately goes low to disable the charge MOSFET - no delay timer applies. When the voltage falls below 7.3 V (±2 V), CO returns high to resume charging. This dedicated overvoltage charger detection path operates independently of cell voltage sensing and requires no external components.
Can the AP9101CK-BJTRG1 be used in automotive applications?
The AP9101CK-BJTRG1 is not AEC-Q100 qualified and is specified for industrial temperature range (–40°C to +85°C), not automotive grade (–40°C to +125°C). While its 30 V VM–VDD rating and robust ESD performance (2 kV HBM) suit harsh environments, Diodes Incorporated explicitly states that automotive-grade variants require separate qualification, PPAP capability, and IATF 16949 manufacturing - none of which apply to this part number.
AP9101CK-BJTRG1 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
AP9101CK-BJTRG1 FAQ
1.How can I place an order for AP9101CK-BJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP9101CK-BJTRG1 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 AP9101CK-BJTRG1 reliable?
The price and inventory of AP9101CK-BJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9101CK-BJTRG1 is usually 5 days.
3.What payment methods are accepted for AP9101CK-BJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9101CK-BJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP9101CK-BJTRG1?
AP9101CK-BJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP9101CK-BJTRG1 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 AP9101CK-BJTRG1?
For technical support, including AP9101CK-BJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9101CK-BJTRG1 requirements.
6.How does Aetrix verify that AP9101CK-BJTRG1 is sourced from the original manufacturer or authorized distributors?
All AP9101CK-BJTRG1 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 AP9101CK-BJTRG1 meets industry standards.
7.What is the process for return or replacement of AP9101CK-BJTRG1?
All AP9101CK-BJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP9101CK-BJTRG1, 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 AP9101CK-BJTRG1 part is unused and in its original packaging.
Return procedure for AP9101CK-BJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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