This application note describes the performances of a 400W reference board, with wide-range mains operation and power-factor-correction (PFC) and presents the results of its bench evaluation. The electrical specification refers to a power supply for general purpose application, with two main output voltages (200 V and 75 V). The main features of this design are the very low no-load input consumption (<0.5 W) and the very high global efficiency, better than 90% at full load and nominal mains voltage (115 - 230 VAC).
This document describes the performance of a 400W reference board featuring wide-range mains operation and power-factor-correction (PFC). The design utilizes an L6599-based half-bridge resonant converter with two main output voltages of 200V and 75V, achieving better than 90% global efficiency at full load.
| Input mains range | 90 to 264 Vac - 45 to 65 Hz |
|---|---|
| Output voltages | 200 [email protected], 75V@1A, [email protected], 5V@1A |
| Standby consumption | less than 0.5 W @230 Vac |
| Overall efficiency | better than 87% at full load |
| EMI compliance | EN55022-class B |
| Safety compliance | EN60950 |
| PCB dimensions | 132x265 mm |
The reference board is rated for 400W.
The PFC stage uses the L6563 PFC controller.
The resonant converter is controlled by the L6599.
The no-load input consumption is less than 0.5 W.