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R7779C

Burst Triple Mode PWM Controller with Integrated HV Start-up Device for Zero Power Monitor Application

R7779C
New

The R7779C is a high-performance current mode PWM controller with integrated HV start-up device inside. During start-up, a current source through integrated HV device to charge VDD capacitor for quick start-up while it dissipates no loss in normal operation. The R7779C provides users a superior AC/DC power application of higher efficiency, few external component count, and low cost solution. It features frequency jitter, Under Voltage Lockout (UVLO), Leading Edge Blanking (LEB), internal slope compensation in the tiny SOP-7 package, and offers complete protection coverage with Over Temperature Protection (OTP), Over Load Protection (OLP) and Over Voltage Protection (OVP).

Applications

  • Switching AC/DC Adaptor
  • TV and Monitor Application
  • Low Standby Power Home Appliance

Key Spec.

R7779C
Status EOL
Feedback Regulation Mode SSR
Switching Frequency_Normal (kHz) 65
Switching Frequency_Peak (kHz) 65
Peak load Application No
HV Start-up Yes
CCM/Valley Multi-mode CCM/Hard Switching Multi-mode
Programmable Burst/Green-mode No
Brown-in/out No
OVP OVP
External OTP No
UVLO ON (V) 16.5
UVLO OFF (V) 9
VDD OVP (V) 28
Features Current Mode Control;Cycle-by-Cycle Current Limit;OCP;OVP;PWM;SCP;UVP
Package Type SOP-7

Features

  • Integrated HV Start-up Device

  • UVLO : 9V/16.5V

  • Current Mode Control

  • Built-in 65kHz Operation Frequency

  • Built-in Jittering Frequency

  • Internal PWM Leading Edge Blanking

  • Internal Slope Compensation

  • Compensated Burst Triple Mode PWM

  • Cycle-by-Cycle Current Limit

  • Internal Auto Recovery OVP

  • Internal Auto Recovery OLP

  • Internal Auto Recovery OTP

  • CS Pin Open Protection

  • Secondary Rectifier Short Protection

  • Soft Driving for Reducing EMI Noise

  • High Noise Immunity

Contact us for more information