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VIPER100B Datasheet(PDF) 5 Page - STMicroelectronics

Part No. VIPER100B
Description  SMPS PRIMARY I.C.
Download  20 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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VIPER100B Datasheet(HTML) 5 Page - STMicroelectronics

 
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ELECTRICAL CHARACTERISTICS (continued)
OSCILLATOR SECTION
Symb ol
Parameter
Test Con ditio ns
Mi n.
Typ .
Max.
Un it
FSW
Oscillator Frequency
Total Variation
RT =8.2 K
CT =2.4 nF
VDD =9 to15 V
with RT
± 1%
CT
± 5%
(see fig. 6 and fig. 9)
90
100
110
KHz
VOSCih
Oscillator Peak Volt age
7.1
V
VOSCil
Oscillator Valley Voltage
3.7
V
ERROR AMPLIFIER SECTION
Symb ol
Parameter
Test Cond ition s
Mi n.
Typ .
Max.
Un it
VDDre
Vg Regulation Point
ICOMP = 0 mA
(see fig. 1)
12. 61313.4
V
∆VDDreg
Total Variation
TJ = 0 t o 100
oC2
%
GBW
Unity G ain Bandwidt h
From Input = VDD to Output = VCOMP
CO MP pin is open (see fig. 10)
150
KHz
AVOL
Open Loop Voltage
Gain
CO MP pin is open (see fig. 10)
45
52
dB
Gm
DC T ransconductance
VCOMP = 2.5 V
(see fig. 1)
1. 1
1.5
1.9
mA/V
VCOMPL O
Output Low Level
ICOMP =-400
µAVDD =14 V
0.2
V
VCOMPHI
Output High Level
ICOMP =400
µAVDD =12 V
4.5
V
ICOMPLO
Output Low Current
Capabilit y
VCOMP =2.5 V
VDD =14 V
-600
µA
ICOMPHI
Output High Current
Capabilit y
VCOMP =2.5 V
VDD = 12 V
600
µA
PWM COMPARATOR SECTION
Symb ol
Parameter
Test Cond ition s
Mi n.
Typ .
Max.
Un it
HID
∆VCOMP/∆IDpeak
VCOMP = 1 t o 3 V
0.35
0.5
0.65
V/A
VCOMPoff
VCOMP offset
IDp eak =10 mA
0.5
V
IDpeak
Peak Current Limit ation VDD = 12 V
COMP pin open
6
8
11
A
td
Current Sense Delay
to turn-off
ID = 1 A
250
ns
tb
Blanking Time
250
360
ns
ton( min)
Minimum on T ime
350
ns
SHUTDOWN AND OVERTEMPERATURE SECTION
Symb ol
Parameter
Test Cond ition s
Mi n.
Typ .
Max.
Un it
VCOMPth
Restart threshold
(see fig. 4)
0.5
V
tDISsu
Disable Set Up T ime
(see fig. 4)
1.7
5
µs
Ttsd
Thermal Shutdown
Temperature
(see fig. 8)
140
170
oC
Thyst
Thermal Shutdown
Hysteresis
(see fig. 8)
40
oC
VIPER100B/BSP
5/20


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