VIPER26

Manufacturer Part NumberVIPER26
DescriptionVIPerPlus family: fixed frequency high performance off line high voltage converter
ManufacturerSTMicroelectronics
VIPER26 datasheet
 
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Burst mode
Figure 24. COMP pin voltage versus I
13
Burst mode
When the voltage V
OFF state and the consumption is reduced to I
page
6. As reaction at the energy delivery stop, the V
as it exceeds the threshold V
consumption level equal to I
mode” and reported on
down even to a few hundreds hertz, thus minimizing all frequency-related losses and
making it easier to comply with energy saving regulations. During the burst mode, the drain
current limit is reduced to the value I
avoid the audible noise issue.
Figure 25. Load-dependent operating modes: timing diagrams
V
COMP
V
+V
COMPL
COMPL_HYS
V
COMPL
I
I
DD1
I
DD0
I
DRAIN
I
Dlim_bm
16/25
DLIM
drops below the threshold, V
COMP
DD0
+ V
COMPL
COMPL_HYS
current. This ON-OFF operation mode, referred to as “burst
DD1
Figure 25 on page
16, reduces the average frequency, which can go
(reported on
Dlim_bm
DD
Doc ID 17736 Rev 2
, the power MOSFET is kept in
COMPL
Table 7 on
current, as reported on
voltage increases and as soon
COMP
, the converter starts switching again with
Table 8 on page
7) in order to
Burst Mode
VIPER26
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time
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