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R7780A Dataheets PDF



Part Number R7780A
Manufacturers Richtek Technology
Logo Richtek Technology
Description Burst Triple Mode PWM Controller
Datasheet R7780A DatasheetR7780A Datasheet (PDF)

® R7780A Burst Triple Mode PWM Controller with Integrated HV Start-up Device for Zero Power Monitor Application General Description The R7780A 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 R7780A provides users a superior AC/DC power application of higher efficiency, few external component c.

  R7780A   R7780A


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® R7780A Burst Triple Mode PWM Controller with Integrated HV Start-up Device for Zero Power Monitor Application General Description The R7780A 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 R7780A 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). Ordering Information R7780A Package Type S : SOP-7 N : DIP-8 Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Marking Information R7780AGS R7780A GSYMDNN R7780AGS : Product Number YMDNN : Date Code 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  RoHS Compliant and Halogen Free Applications  Switching AC/DC Adaptor  TV and Monitor Application  Low Standby Power Home Appliance Pin Configurations (TOP VIEW) NC COMP CS GND 2 3 4 7 HV 6 VDD 5 GATE SOP-7 HV NC VDD GATE R7780AGN RichTek R7780A GNYMDNN R7780AGN : Product Number YMDNN : Date Code Copyright ©2014 Richtek Technology Corporation. All rights reserved. R7780A-01 August 2014 87 65 2 34 NC COMP CS GND DIP-8 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 R7780A Typical Application Circuit AC Mains (90V to 265V) # R7780A HV VDD COMP GND GATE CS OPTO1 # OPTO1 # VO+ VO- LDO # See Application Information GPIO Scalar OPTO2 Functional Pin Description Pin No. SOP-7 DIP-8 Pin Name Pin Description 1 1, 7 NC No Internal Connection. 2 2 COMP Voltage Feedback. By connecting an opto-coupler to close control loop and achieve the regulation. 3 3 CS Current Sense Input. 4 4 GND Ground. 5 5 GATE Gate Driver Output. Connect a resistor from this pin to the external power MOSFET. 6 6 VDD Power Supply Input. 7 8 HV 700V High Voltage Input Pin for Start-up. Copyright ©2014 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. R7780A-01 August 2014 Function Block Diagram HV R7780A COMP CS Secondary Rectifier Short Protection 2.6V - & CS Open Protection + Shutdown Logic Brownout Sensing OLP COMP Open Sensing Counter OTP POR OVP + - UVLO + - 28V 9/16.5V Oscillator Bias & Bandgap Constant Power SS Slope Ramp LEB X3 Dmax + PWM Comparator S Q R Burst Triple Mode& TP Compensation Soft Driver COMP VBURH VBURL VDD VDD GATE Copyright ©2014 Richtek Technology Corporation. All rights reserved. R7780A-01 August 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 R7780A Absolute Maximum Ratings (Note 1)  HV ----------------------------------------------------------------------------------------------------------------------------- −0.3V to 700V  Supply Input Voltage, VDD ---------------------------------------------------------------------------------------------- −0.3V to 30V  GATE ------------------------------------------------------------------------------------------------------------------------- −0.3V to 20V  COMP, CS ------------------------------------------------------------------------------------------------------------------ −0.3V to 6.5V  Power Dissipation, PD @ TA = 25°C SOP-7 ------------------------------------------------------------------------------------------------------------------------ 0.36W DIP-8 ------------------------------------------------------------------------------------------------------------------------- TBD  Package Thermal Resistance (Note 2) SOP-7, θJA ------------------------------------------------------------------------------------------------------------------ 276.5°C/W DIP-8, θJA -------------------------------------------------------------------------------------------------------------------- TBD  Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C  Lead Temperature (Soldering, 10 sec.) ----------------------------------.


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