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VIPER319LDTR 数据表(PDF) 8 Page - STMicroelectronics

部件名 VIPER319LDTR
功能描述  Energy saving offline high voltage converter
PDF  40 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

VIPER319LDTR 数据表(HTML) 8 Page - STMicroelectronics

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Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
tOVL
Overload delay time
45
50
55
ms
tOVL_max
Max. overload delay time
When in pulse skipping
100
ms
tSS
Soft-start time
5
8
11
ms
tON_MIN
Minimum turn-on time
VCC=9 V,
VCOMP=1 V,
VFB=VFB_REF
250
300
350
ns
tRESTART
Restart time after fault
0.625
1
1.375
s
UVP
VUVP_th
UVP threshold
VCC =9 V,
VCOMP=1 V,
VFB=VFB_REF
0.38
0.4
0.42
V
IUVP_pull- up
UVP pull-up current
-1
µA
tUVP_DEB
Debounce time before UVP tripping
18.75
30
41.25
ms
tUVP_REST
Debounce time for restoring normal
operation from UVP
18.75
30
41.25
ms
Iq_DIS
Quiescient current during UVP
Not switching, VFB>VFB_REF
0.25
0.35
mA
OVP
VOVP_th
Overvoltage protection threshold
VCC=9 V,
VCOMP=1 V,
VFB=VFB_REF
3.85
4
4.15
V
tOVP_DEB
Debounce time before OVP tripping
156
250
344
µs
tOVP_REST
Restart time after overvoltage
protection tripping
312
500
688
ms
Oscillator
FOSC
Switching frequency
TJ =25ºC VIPER31*X
27
30
33
kHz
TJ = 25ºC, VIPER31*L
54
60
66
TJ = 25ºC, VIPER31*H
119
132
145
FOSC MIN
Min. switching frequency
TJ= 25ºC (3)
13.5
15
16.5
kHz
FD
Modulation depth
(4)
±7·FOSC
%
FM
Modulation frequency
(4)
200
Hz
DMAX
Max. duty cycle
(4)
70
80
%
Thermal shutdown protection
TSD
Thermal shutdown temperature
threshold
(4)
150
160
°C
1. Measured at Vin = 100 Vdc in Flyback topology, with 1.5 mH transformer primary inductance
2. See Section 4.10 Pulse frequency modulation
3. See Section 4.7 Pulse skipping
4. Parameter assured by design and characterization.
VIPER31
Electrical characteristics
DS13285 - Rev 3
page 8/40



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