AN628 Datasheet, PDF (29/35 Pages) STMicroelectronics – DESIGNING A HIGH POWER FACTOR SWITCHING

Figure 27. P.C.B. Solder Side (Dimensions 88 x 150mm)
AN628 APPLICATION NOTE
DEMO BOARD TEST RESULTS
Table 1. Maximum power range at 110Vac
V_mains
P_out
V_out
P_in
THD
PF
Eff.
88Vac
403W
401Vdc
433W
5.1%
0.998
.93
110Vac (*)
407W
403Vdc
431W
2.2%
0.999
.945
132Vac
409W
404Vdc
430W
2.7%
0.999
.95
(*) Most significant losses balance at maximum power (110Vmains):
– Power-mos (Q1+Q2) dissipated power = 9.6W.
– Bridge (B1) dissipated power = 6.3W.
– Boost turbo-diode (D4) dissipated power = 1.6W.
– Boost inductor L1 = 2W
– Aux. Inductor L2 = 1.6W.
– NTC dissipated power = 1.1W.
– Snubber = 1.4W
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