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VIPER20B Datasheet(PDF) 5 Page - STMicroelectronics

Part No. VIPER20B
Description  SMPS PRIMARY I.C.
Download  17 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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VIPER20B Datasheet(HTML) 5 Page - STMicroelectronics

 
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ELECTRICAL CHARACTERISTICS (continued)
ERROR AMPLIFIER SECTION
Symb ol
Parameter
Test Cond ition s
Mi n.
Typ .
Max.
Un it
VDDreg
VDD Regulation Point
ICOMP = 0 mA
(see fig. 1)
12. 61313.4
V
∆VDDreg
Total Variation
TJ = 0 to 100
oC2
%
GBW
Unity G ain Bandwidt h
From Input = VDD to Output = VCOMP
CO MP pin is open (see fig. 8)
150
KHz
AVOL
Open Loop Voltage
Gain
CO MP pin is open (see fig. 8)
TBD
50
dB
Gm
DC T ransconductance
VCOMP = 2.5 V
(see fig. 1)
TBD
1.5
T BD
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 to 3 V
TBD
2.3
T BD
V/A
VCOMPoff
VCOMP offset
IDp eak =10 mA
0.5
V
IDpeak
Peak Current Limit ation VDD = 12 V
COMP pin open
1. 3
T BD
A
td
Current Sense Delay
to turn-off
ID = 0. 4 A
250
ns
tb
Blanking Time
300
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. 6)
140
160
oC
Thyst
Thermal Shutdown
Hysteresis
(see fig. 6)
34
oC
VIPer20B / VIPer20BSP
5/17


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