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VIPER25HD Datasheet(PDF) 9 Page - STMicroelectronics

Part No. VIPER25HD
Description  Off-line high voltage converters
Download  40 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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VIPER25HD Datasheet(HTML) 9 Page - STMicroelectronics

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 9 / 40 page
background image
VIPER25
Electrical data
Doc ID 15585 Rev 4
9/40
Oscillator section
FOSClim
Internal frequency limit
VIPER25L
122
136
150
kHz
Internal frequency limit
VIPER25H
200
225
250
kHz
FSTARTER
Starter frequency
VFB=1 V,
VZCD<VZCDT th
t<tSU
1/4
FOSClim
kHz
VFB=1 V,
VZCD<VZCDT th
t>tSU
1/8
FOSClim
kHz
FOSCmin
VFB = 1 V,
VZCD > VZCDA_th
1/64
FOSClim
kHz
Brown-out protection
VBRth
Brown-out threshold
Voltage falling
0.41
0.45
0.49
V
VBRhyst
Voltage hysteresis above
VBRth
Violate rising
50
mV
IBRhyst
Current hysteresis
7
12
μA
VBRclamp
Clamp voltage
IBR = 250 µA
3
V
VDIS
Brown-out disable voltage
50
150
mV
Thermal shutdown
TSD
Thermal shutdown
temperature
150
160
°C
THYST
Thermal shutdown hysteresis
30
°C
Table 8.
Controller section (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max. Unit


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