AN10907
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Application note
Rev. 1 — 28 December 2010
49 of 82
NXP Semiconductors
AN10907
TEA1613T resonant power supply control IC
9.3 Advantages of burst mode in HBC
The main reason for applying burst mode in a resonant converter is to improve the
efficiency at low output power by reducing the power losses.
The graphs in
and
show the principle improvements in a 250 W
resonant converter including (non-bursting) PFC.
Fig 34. Improved efficiency by HBC burst mode in a 250 W converter
Fig 35. Reduced losses by HBC burst mode in a 250 W converter
P
o
(W)
0
50
40
20
30
10
001aal458
40
60
20
80
100
efficiency
(%)
0
with burst mode
with burst mode
normal mode
P
o
(W)
0
15
10
5
001aal459
8
12
4
16
20
P
i
(W)
0
with burst mode
with burst mode
normal mode
