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50W wide range high power factor flyback converter using L6564

STEVAL-ISA142V1

Overview

The STEVAL-ISA142V1 product evaluation board implements a 50 W, wide-range mains input, power factor-corrected power supply suitable for all low power applications requiring a high power factor, such as lighting applications and LED power supplies. Use of the low-cost L6564 combined with simple flyback topology provide a very competitive solution.

Main features

Line voltage range: 90 to 265 VAC
Minimum line frequency (fl): 47-63 Hz
Minimum switching frequency: 44 KHz
Reflected voltage: 140 V
Regulated output voltage: 24 V
Rated output power: 50 W
Power factor (load ≥ 50%): 0.9 minimum

Minimum efficiency at full load: 88%
Maximum 2 fl output voltage ripple: 1.1 V pk-pk (V_IN=230 V_AC, P_out=50 W)
Maximum ambient temperature: 50 °C
Conducted EMI: in accordance with EN55022 class-B
PCB type and size: single-sided, 35 um, CEM-1, 140 x 60 mm
RoHS compliant

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-05-07 19:50:06

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