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STEVAL-ILL076V2：18 W wide input range ultra slim flyback converter using HVLED001A quasi resonant flyback controller and STD8N80K5

This board implements an offline power converter based on a single stage high-PF flyback topology using the HVLED001A controller.

A very slim form factor is achieved with innovative magnetic componentry.

The output voltage is controlled by the primary side, thus reducing the need for costly opto-couplers. The HVLED001A PSR precision and the innovative structure of the transformer makes for highly accurate output voltage regulation against load and line changes.

A very high efficiency is obtained and a full set of protections including output short circuit and input overvoltage is included.

Conducted EMI is pre-screened and clearances and creepage distances adhere to EN60950 safety requirements.

Power factor and THD are optimized to be respectively higher than 0.95 and lower than 10% at full load over the entire input voltage range.

The main application for this converter is for bus power supplies in a LED string driver providing 4 kV isolation.

Key Features

• Input voltage: Vin: 90 – 264 Vrms, f: 45 – 66 Hz
• Output power:
  • 18 W at wide input range
  • 40 W at European input range
• Output voltage: 56 V ±5 %
• High power factor, low THD
• No-load: better than 400 mW at 230 Vin
• Full load efficiency: greater than 92 %
• Short circuit protection with auto restart
• EMI: pre-compliant with EN55022 (B) limits
• Safety: complies with EN60950
• Dimensions: 183 mm x 28 mm x 17 mm
• PCB: single sided, 35 µm, FR4, mixed PTH/SMD
• RoHS compliant

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