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VIPER27LD Scheda tecnica(PDF) 7 Page - STMicroelectronics

Il numero della parte VIPER27LD
Spiegazioni elettronici  Off-line high voltage converters
PDF  31 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VIPER27LD Scheda tecnica(HTML) 7 Page - STMicroelectronics

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VIPER27
Electrical data
Doc ID 15133 Rev 5
7/31
Table 8.
Controller section
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
Feed-back pin
VFBolp
Over load shutdown threshold
4.5
4.8
5.2
V
VFBlin
Linear dynamics upper limit
3.2
3.5
3.7
V
VFBbm
Burst mode threshold
Voltage falling
0.6
V
VFBbmhys Burst mode hysteresis
Voltage rising
100
mV
IFB
Feed-back sourced current
VFB = 0.3 V
-150 -200 -280
μA
3.3 V < VFB < 4.8 V
-3
μA
RFB(DYN) Dynamic resistance
VFB < 3.3 V
14
21
k
Ω
HFB
ΔV
FB / ΔID
26
V/A
CONT pin
VCONT_l Low level clamp voltage
ICONT = -100 µA
0.5
V
Current limitation
IDlim
Max drain current limitation
VFB = 4 V,
ICONT = -10 µA
TJ = 25 °C
0.66
0.7
0.74
A
tSS
Soft-start time
8.5
ms
TON_MIN
Minimum turn ON time
220
400
480
ns
td
Propagation delay
100
ns
tLEB
Leading edge blanking
300
ns
ID_BM
Peak drain current during burst mode
VFB = 0.6 V
160
mA
Oscillator section
FOSC
VIPER27L
VDD = operating voltage range,
VFB = 1 V
54
60
66
kHz
VIPER27H
103
115
127
kHz
FD
Modulation depth
VIPER27L
±4
kHz
VIPER27H
±8
kHz
FM
Modulation frequency
250
Hz
DMAX
Maximum duty cycle
70
80
%
Over current protection (2nd OCP)
IDMAX
Second over current threshold
1
A
Overvoltage protection
VOVP
Overvoltage protection threshold
2.7
3
3.3
V
TSTROBE Overvoltage protection strobe time
2.2
us



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