R7780 Datasheet | Richtek

Description The R7780 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 R7780 provides the users a superior AC/DC power application of higher efficiency, few external ponent counts, and low cost solution. It features frequency jitter, Under Voltage Lock Out (UVLO), Leading Edge Blanking (LEB), internal slope pensation in the tiny SOP-7 package. It offers plete protection coverage with Over Temperature Protection (OTP), Over Load Protection (OLP) and Over Voltage Protection (OVP). Moreover, it also provides a special interface for zero power application when the converter is in sleeping mode. EN/ DIS pin receives ON/OFF signal from secondary scalar controller. During turning off, the controller will be shutdown pletely with pretty low power consumption. Features z Integrated HV Start-up Device z Enable/Disable Function z UVLO: 9V/16.5V z Current Mode Control z Built-in 65k Hz Operation Frequency z Built-in Jittering Frequency z Internal PWM Leading Edge Blanking z Internal Slope pensation z pensated Burst Triple Mode PWM z Cycle-by-Cycle Current Limit z Internal Auto Recovery OVP z Internal Auto Recovery OLP z Internal Auto Recovery OTP z CS Pin Open Protection z Secondary Rectifier Short Protection z Soft Driving for Reducing EMI Noise z High Noise Immunity z Ro HS pliant and Halogen Free Ordering Information Package Type S : SOP-7 Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020. ` Suitable for use in Sn Pb or Pb-free soldering processes. Marking Information R7780GS : Product Number R7780 GSYMDNN YMDNN : Date Code Applications z Switching AC/DC Adaptor z TV and Monitor Application z Low Standby Power Home Appliance Pin Configurations (TOP...