EVB 12V/1A PSR primary side regulation

Overview

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).

  • Internal 20−mA current source for lossless start−upsequence and self−supply operation
  • Smooth start−up sequence with frequency sweep
  • Internal operational amplifier with precise 2.5−Vreference 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 Tools

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Ref. Design

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Part Used

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EVB 12V/1A PSR primary side regulation

Evaluation Board

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Technical Documentation

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NCV12711PSRGEVB_GERBER

0

Eval Board: Gerber

261.12 KB

EN

Eval Board: Gerber

May 26, 2022

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Eval Board: Manual

May 01, 2022

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NCV12711_LTSPICE_MODEL

0

Models

64.51 KB

EN

Models

July 04, 2023

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NCV12711PSRGEVB_SCHEMATIC

3

Eval Board: Schematic

520.19 KB

EN

Eval Board: Schematic

May 26, 2022

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Eval Board: Manual

May 01, 2022

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NCV12711PSRGEVB_BOM_ROHS

1

Eval Board: BOM

283.65 KB

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Eval Board: BOM

May 26, 2022

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NCV12711PSRGEVB_TEST_PROCEDURE

1

Eval Board: Test Procedure

497.66 KB

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Eval Board: Test Procedure

May 26, 2022

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