Pulsiv PSV-AD-250-Q24I | Demoboard PSV-RDAD-75FB

Description

The PSV-RDAD-75FB reference design combines the Pulsiv OSMIUM PSV-AD-250 microcontroller with a flyback DC-DC converter based on the Texas Instruments UCC28740. It delivers a compact, efficient & low cost solution for a broad range of 48V applications.This circuit uses commodity system components to deliver results that exceed US DoE Level VI and EU CoC Tier 2 efficiency requirements:• 73% at 1W (EU CoC minimum requirement is >52%)• 90% at 10W (EU CoC minimum requirement is >78%)The Pulsiv OSMIUM architecture maintains high power-factor and efficiency without using a PFC inductor; avoiding the need to boost the voltage into the power stage. This provides significant efficiency improvements at low power while delivering high efficiency across the full load range.The Texas Instruments UCC28740 is an isolated-flyback power-supply controller that provides Constant-Voltage (CV) using an optical coupler to improve transient response to large- load steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation techniques. It processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current.

Features

• Input Voltage: 85 – 264VAC
• Output Voltage: 48VDC
• Output Power: 75W
• Average Efficiency: 90%
• Peak Efficiency: 91.5%
• No-Load Power: 110mW
• Inrush Current: Eliminated
• Harmonic Current: Meets IEC61000-3-2 Class A
• Low Profile: 18mm maximum height

Typical applications

More information

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