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Product Detailed Parameters
- Description：IC REG CONTROLLER ACDC
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Output Isolation：Isolated
- Internal Switch(s)：No
- Voltage - Breakdown：-
- Topology：Flyback
- Voltage - Start Up：15.5 V
- Voltage - Supply (Vcc/Vdd)：6.5V ~ 30V
- Duty Cycle：-
- Frequency - Switching：-
- Fault Protection：Open Circuit, Over Voltage, Short Circuit
- Control Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：SOT-23-6
- Supplier Device Package：SOT-26
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：-
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Overview
The AP3771BK6TR-DG1 is a low-power offline primary side regulation controller manufactured by Diodes Incorporated. It utilizes Pulse Frequency Modulation (PFM) for high-performance AC/DC power supply applications, specifically targeting battery chargers and adapters. The device operates within a Vcc/Vdd range of 3.5V to 30V with a startup voltage of 15.5V. It features an integrated SOT-26 package suitable for surface mount installation. The component includes comprehensive fault protection mechanisms such as open circuit, overvoltage, and short circuit protection. It supports flyback topology and functions within an operating temperature range of -40°C to 85°C.
Feature Summary
- Primary side regulation architecture eliminates the need for optocouplers and secondary-side feedback components.
- Pulse Frequency Modulation (PFM) control strategy ensures efficient power conversion across varying load conditions.
- Integrated fault protection safeguards against open circuit, overvoltage, and short circuit events.
Applications
- Battery charger designs
- AC/DC adapter implementations
- Low-power offline power supplies
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and marking accuracy upon receipt. Check for recent Product Change Notifications (PCN) or End-of-Life (EOL) notices from Diodes Incorporated. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Validate that the specific suffix matches design specifications.
Selection Notes
Select this controller for cost-sensitive designs requiring isolation without secondary-side regulation complexity. Suitable for applications where board space is limited due to the compact SOT-26 footprint. Consider thermal management requirements given the operating temperature range. Evaluate input voltage stability to ensure reliable startup behavior within the specified 15.5V threshold.
Part Context
This component belongs to the AP3771 series of offline controllers from Diodes Incorporated. The series focuses on low-power AC/DC conversion solutions. Variants in this family share similar PFM control architectures but may differ in packaging or specific electrical tolerances. The AP3771 series is designed to replace traditional discrete solutions in consumer electronics power stages.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing transformer designs if cross-referencing with other primary-side regulation controllers. Consult Diodes Incorporated technical support for qualified alternatives if this specific part number is discontinued or unavailable.
