NCV12711PSRGEVB: EVB 12V/1A PSR primary side regulation

The evaluation board NCV12711PSRGEVB is wide input range primary-side-regulated flyback converter for automotive applications capable deliver up to 12W (12V/1A) on its output. The converter is built with the NCV12711 operated in current-mode control at 100 kHz. This control circuit offers many features to build an energy-efficient converter with all the needed protections like cycle-by-cycle current limit with a 250-mV sense voltage, over-current protection (OCP) and over-voltage protection (OVP) on the VCC pin.
The controller drives an N-channel MOSFET as with any classical flyback converter at a user-adjustable switching frequency. The secondary side hosts a low-Vf diode for efficient rectification in continuous conduction mode (CCM).
Features and Applications


  • Internal 20−mA current source for lossless start−up sequence and self−supply operation
  • Smooth start−up sequence with frequency sweep
  • Internal operational amplifier with precise 2.5−V reference voltage
  • Current−mode control operation
  • Short circuit protection
  • Over voltage protection
  • Input Voltage UVLO with Hysteresis
  • Shutdown threshold for external disable
  • 0% duty ratio mode for low standby power
  • Single Resistor Programmable Oscillator
  • User−Adjustable Soft−Start Ramp
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used Action
NCV12711PSRGEVB Active
EVB 12V/1A PSR primary side regulation NCV12711ADNR2G
Technical Documents
Type Document Title Document ID/Size Rev
Eval Board: Manual A 12-V/1-A Primary Side Regulated Isolated Flyback Converter for Automotive Applications EVBUM2837/D - 2503 KB  1 
Eval Board: BOM NCV12711PSRGEVB Bill of Materials (ROHS Compliant) NCV12711PSRGEVB_BOM_ROHS - 277 KB  0 
Eval Board: Gerber NCV12711PSRGEVB Gerber Layout Files (Zip Format) NCV12711PSRGEVB_GERBER - 255 KB  0 
Eval Board: Schematic NCV12711PSRGEVB Schematic NCV12711PSRGEVB_SCHEMATIC - 508 KB  0 
Eval Board: Test Procedure NCV12711PSRGEVB Test Procedure NCV12711PSRGEVB_TEST_PROCEDURE - 486 KB  0 
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