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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 AP3981CS-13 is an AC/DC converter IC from Diodes Incorporated, featuring a flyback topology and integrated N-channel power MOSFET. It operates in peak current amplitude modulation (AM) and pulse frequency modulation (PFM) modes to achieve high average efficiency and reduced audible noise. The device provides precise constant current (CC) and constant voltage (CV) regulation without requiring an optocoupler. Key electrical parameters include a minimum supply voltage of 10 V, a maximum supply voltage of 28 V, and a maximum output power of 7.5 W. It supports one isolated output and functions within a temperature range of -40 °C to +85 °C.
Feature Summary
- Integrates primary-side regulation controller with N-channel power MOSFET for compact design
- Delivers precise constant current and constant voltage control without optocouplers
- Operates in AM and PFM modes to optimize efficiency and minimize audible noise
- Includes comprehensive protection features such as OVP, UVP, OTP, and cycle-by-cycle current limiting
Applications
- Router power supplies
- Set-top box (STB) power adapters
- Network adapter systems
Procurement Notes
Verify the specific suffix 'S' against official Diodes Incorporated documentation to confirm package type and tape/reel specifications. Ensure compatibility with required isolation standards and thermal management requirements for the target application environment.
Selection Notes
Select this component for applications requiring isolated flyback conversion with simplified secondary-side circuitry. Consider its integrated protection features and efficiency characteristics when designing power supplies for consumer electronics and networking equipment.
Part Context
The AP3981 series belongs to Diodes Incorporated's family of AC/DC converters designed for offline switcher applications. These devices combine control logic and power switching elements to reduce external component count and improve system reliability compared to discrete solutions.
Replacement Considerations
Consult official substitution guides for compatible alternatives within the AP3981 series or equivalent isolated flyback controllers from other manufacturers.
