Evaluation Board | NCV12711PSRGEVB
EVB 12V/1A PSR primary side regulation
概览
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
- 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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