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The RT7789D series is an enhanced high-efficiency multi-mode PWM flyback controller, incorporating Richtek's proprietary PowerZero<sup>TM</sup> and SmartJitter<sup>TM</sup> technology. The innovative PowerZero<sup>TM</sup> technology, featuring an integrated HV device, provides an excellent green power solution, while the SmartJitter<sup>TM</sup> technology can reduce EMI emissions of a switch-mode power supply in green mode as well as eliminate output ripple due to frequency jittering. Also, the RT7789D series features a multi-mode control scheme, operating from continuous-conduction mode (CCM) to discontinuous-conduction mode (DCM) with valley switching, to achieve high efficiency and optimal performance. <p align="justify">The RT7789D is a current-mode PWM controller for flyback converters. It integrates comprehensive and programmable protection features, which include brown-in/brown-out protection, VDD over-voltage protection (VDD OVP), output over-voltage and under-voltage protection (Output OVP and UVP), secondary rectifier short-circuit protection (SRSP), and external over-temperature protection (External OTP). For constant output power regulation, a resistor connected to CS pin can be used to achieve accurate line compensation across the universal input voltage range. With the above features, the RT7789D enables a cost-effective and compact design for a wide range of AC-DC conversion applications. It is available in a SOP-8 package.</p>
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  • Proprietary PowerZeroTM Technology
    ► Integrating a 700V Start-up Device
    ► Brown-In/Brown-Out Protection
  • Proprietary SmartJitterTM Technology
    ► Reducing EMI Emissions of SMPS
    ► Eliminating Frequency-Jittering-Induced Output Ripple
  • Operating in Continuous-Conduction Mode (CCM), Discontinuous-Conduction Mode (DCM), and DCM with Valley Switching
  • Accurate Over-Current Protection (OCP)
  • Programmable Line Compensation
  • Programmable Output OVP and UVP
  • Programmable External OTP
  • Driver Capability : 300mA/-300mA
  • High Noise Immunity
  • RoHS Compliant and Halogen Free
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Switching AC-DC Adapter<br />NB Adapter<br />Printer Adapter
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