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ACT511 - Quasi-Resonant PWM Controller

Download the ACT511 datasheet PDF. This datasheet also covers the ACT511-Active variant, as both devices belong to the same quasi-resonant pwm controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The ACT511 is a high performance peak current mode PWM controller.

ACT511 applies ActiveQRTM and frequency foldback technique to reduce EMI and improve efficiency.

ACT511’s maximum switching frequency is set at 90kHz.

Key Features

  • Quasi-Resonant Operation.
  • Adjustable up to 75kHz Switching Frequency.
  • Accurate OCP/OLP Protection.
  • Integrated Patented Frequency Foldback Technique.
  • Integrated Patented Line and Primary Inductance Compensation.
  • Built-in Soft-Start Circuit.
  • Line Under-Voltage, Thermal, Output Over- voltage, Output Short Protections.
  • Current Sense Resistor Short Protection.
  • Transformer Winding Short Protection.
  • 100mW Standby.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (ACT511-Active-Semi.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number ACT511
Manufacturer Active-Semi
File Size 162.15 KB
Description Quasi-Resonant PWM Controller
Datasheet download datasheet ACT511 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
ACT511 Product Brief, 18-Feb-14 ActiveQRTM Quasi-Resonant PWM Controller FEATURES • Quasi-Resonant Operation • Adjustable up to 75kHz Switching Frequency • Accurate OCP/OLP Protection • Integrated Patented Frequency Foldback Technique • Integrated Patented Line and Primary Inductance Compensation • Built-in Soft-Start Circuit • Line Under-Voltage, Thermal, Output Over- voltage, Output Short Protections • Current Sense Resistor Short Protection • Transformer Winding Short Protection • 100mW Standby Power • Complies with Global Energy Efficiency and CEC Average Efficiency Standards • Tiny SOT23-6 Packages good margin. ACT511 integrates comprehensive protection.