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| ICE3AR1580VJZ Datasheet, PDF (16/43 Pages) Infineon Technologies AG – Of f -Line SMPS Cur rent Mode Cont rol ler wi th integrated 800V | |||
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VSoftS
VSOFTS32
tSoft-Start
CoolSET⢠F3R80
ICE3AR1580VJZ
Functional Description
Gate
t
Driver
t
Figure 13: Gate drive signal under Soft-Start Phase
In addition to Start-Up, Soft-Start is also activated at each restart attempt during Auto Restart.
VSoftS
VSOFTS32
tSoft-Start
VFB
t
4.5V
VOUT
t
VOUT
tStart-Up
t
Figure 14: Start Up Phase
The Start-Up time tStart-Up before the converter output voltage VOUT is settled, must be shorter than the Soft-Start Phase
tSoft-Start (Figure 14). By means of Soft-Start there is an effective minimization of current and voltage stresses on the
integrated CoolMOSâ¢, the clamp circuit and the output rectifier and it helps to prevent saturation of the transformer
during Start-Up.
Data Sheet
16
V2.0, 2014-01-20
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