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High Efficiency Digital Power Supply

Overview

This design introduces the first interleaved CrM PFC + LLC power supply utilizing an inverter micro MCU by Renesas. It delivers three distinct output channels: main power, audio power, and backlight unit power. The MCU provides digital control for all operations, achieving power efficiency that significantly surpasses conventional analog TV power supplies while maintaining ultra-low power consumption. This design is ideal for modern home theater systems and other consumer electronics requiring high efficiency and precise power management.

System Benefits:

  • Achieves high efficiency of over 94%.
  • Reduces standby and light-load operation current.
  • Supports various circuit topologies with an MCU.
  • Lowers total cost by reducing the number of components.

Block Diagram

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4:3 ratioSheet.1Sheet.2Sheet.3Sheet.4CN030CN030CN030AC Power SourceAlternating CurrentSheet.9AC RelayAC RelayAC RelayLDOLDOLDOIR Receiver ModuleIR Receiver ModuleIR Receiver ModuleGround (earth)Sheet.31Sheet.32Sheet.33Sheet.34Sheet.42Sheet.36Sheet.37Negative Power RailLine.758Line.759Sheet.43Sheet.44Sheet.45Negative Power RailLine.758Line.759Connector ArrowConnector Arrow.56Connector Arrow.57Connector Arrow.58Connector LineSheet.65Sheet.66Connector Line.67Sheet.68Sheet.69Sheet.70Sheet.71Sheet.72Sheet.73Sheet.75Sheet.76Sheet.77Sheet.78Sheet.79Connector 1.160Sheet.81AC 90V – 260VAC 90V-260VAC 90V-260VShuntSheet.84Sheet.85Sheet.86RelaySheet.88Sheet.89Sheet.90Sheet.91Sheet.92Sheet.93Sheet.94Sheet.95Sheet.96Sheet.97Connector 1.160.98Output2/Audio 13VOutput2_Audio 13VOutput2_Audio 13VOutput3/Backlight Unit 250VOutput3_Backlight Unit 250VOutput3_Backlight Unit 250VOutput1/Main Power 13VOutput1_Main Power 13VOutput1_Main Power 13VSheet.104ONONONOFFOFFOFFSheet.132Sheet.133Sheet.134Sheet.1355V5V5V12V12V12V 2Communication Lines B.795222 2Communication Lines B.795 222 2Communication Lines B.795 222Typ. 390VTyp. 390VTyp. 390VSheet.149Sheet.150Sheet.151Connector 1.160.152NTCNTCNTCSheet.154Sheet.155Input FilterInput FilterInput FilterInterleave PFCInterleave PFCInterleave PFCLLC TransferLLC TransferLLC TransferRectifiers CircuitRectifiers CircuitRectifiers CircuitAC/DC RegulatorAC/DC RegulatorAC/DC RegulatorMOSFET DriverMOSFET DriverMOSFET DriverMOSFET DriverMOSFET DriverMOSFET DriverPhotocouplerPhotocouplerPhotocouplerMCUMCUMCUMCU INTPINTPINTPVDDVDDVDDTAUTAUTAUINTPINTPINTPTMKBTMKBTMKBCMPCMPCMP12bit ADC12bit ADC12bitADC

AC/DC Regulator

Non-Isolated AC/DC Buck Converters

LDO

Linear Regulators (LDO)

MOSFET Driver

Low-Side FET Drivers

Photocoupler

Photocouplers/Optocouplers Transistor Output

MCU

RL78 Low-Power 8 & 16-Bit MCUs

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