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VIPER35 Datasheet(PDF) 5 Page - STMicroelectronics

Part # VIPER35
Description  Quasi-resonant high performance off line high voltage converter
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VIPER35 Datasheet(HTML) 5 Page - STMicroelectronics

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DocID026980 Rev 4
5/44
VIPer35
List of figures
44
List of figures
Figure 1.
Basic application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3.
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4.
VDDon vs TJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5.
VDD(RESTART) vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6.
IDlim vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7.
VDRAIN_START vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 8.
HFB vs TJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 9.
VBRth vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 10.
VBRhyst vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11.
IBRhysvs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 12.
IDD0 vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 13.
IDD1 vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 14.
VZCD vs IZCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 15.
IDlim vs IZCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 16.
RDS(on) vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 17.
VBVDSS vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 18.
IDDch1 vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 19.
IDDch2 vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 20.
FOSClim_L vs TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 21.
FOSClim_H vs TJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 22.
Thermal shutdown timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 23.
Min-feature quasi-resonant flyback (isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 24.
Full-feature quasi-resonant flyback (isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 25.
Power supply consumption at light output loads, VOUT = 12 V . . . . . . . . . . . . . . . . . . . . . . 18
Figure 26.
Power supply consumption at no output load, VOUT = 12 V . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 27.
IDD current during start-up and burst mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 28.
Timing diagram: normal power-up and power-down sequence . . . . . . . . . . . . . . . . . . . . . 21
Figure 29.
Timing diagram: start-up phase and soft-start (case 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 30.
Timing diagram: start-up phase and soft-start (case 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 31.
Timing diagram: behavior after short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 32.
Switching frequency vs power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 33.
Zero-current detection circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 34.
Drain ringing cycle skipping as the load progressively reduces . . . . . . . . . . . . . . . . . . . . . 25
Figure 35.
Timing diagram: double blanking time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 36.
Typical power capability vs input voltage in quasi-resonant converter . . . . . . . . . . . . . . . . 28
Figure 37.
ZCD pin typical external configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 38.
Timing diagram: OVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 39.
FB pin configuration (minimal BOM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 40.
FB pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 41.
Timing diagram: overload protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 42.
Burst mode timing: light load management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 43.
Brown-out: external setting and timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 44.
SO16N package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 45.
SDIP10 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40


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