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Product Detailed Parameters
- Description：IC OFFLINE SWITCH FLYBACK 8SO
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Isolation：Isolated
- Internal Switch(s)：Yes
- Voltage - Breakdown：650V
- Topology：Flyback
- Voltage - Start Up：16 V
- Voltage - Supply (Vcc/Vdd)：10V ~ 28V
- Duty Cycle：-
- Frequency - Switching：-
- Fault Protection：Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
- Control Features：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：-
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Overview
The AP3981D2S-13 is an AC/DC converter power switcher manufactured by Diodes Incorporated. It integrates a primary-side regulation controller and an N-channel power MOSFET in a single package. The device operates in Flyback topology using Peak Current Mode (AM) and Pulse Frequency Modulation (PFM). It supports a supply voltage range of 10 V to 28 V and functions within a temperature range of -40 °C to +85 °C. The component provides one isolated output and is housed in an SOIC-8 surface-mount package.
Feature Summary
- Integrates primary-side regulation controller with N-channel power MOSFET for compact design
- Eliminates the need for optocouplers through precise constant current and constant voltage control
- Operates in AM and PFM modes to optimize efficiency and reduce audible noise across power ranges
- Includes comprehensive protection features such as OVP, UVP, OTP, and cycle-by-cycle current limiting
Applications
- Router power supplies
- Set-top box (STB) adapters
- Network adapter units
Procurement Notes
Verify the specific suffix 'D2S' against official Diodes Incorporated documentation to confirm pinout compatibility and thermal characteristics. Ensure the ordering information matches the required tape-and-reel quantity specifications. Confirm RoHS compliance status directly from the manufacturer's latest datasheet before finalizing procurement decisions.
Selection Notes
Select this component for designs requiring isolated flyback conversion without optocouplers. It is suitable for applications needing integrated protection mechanisms and high average efficiency. Consider the SOIC-8 package constraints and the specified operating temperature range when designing the thermal management system for the target application environment.
Part Context
This part belongs to the AP3981 series of power switchers from Diodes Incorporated. The series combines power switching and control logic to simplify AC/DC converter designs. These devices are categorized under PMIC - Power Management ICs and are designed for cost-effective, high-performance power solutions in consumer and data communication electronics.
Replacement Considerations
Consult official substitution guides for compatible alternatives within the AP3981 family or equivalent primary-side regulated controllers. Verify that any substitute maintains the same SOIC-8 footprint and electrical ratings.
