viper20b STMicroelectronics, viper20b Datasheet - Page 5

• Manufacturer Part Number: viper20b
• Description: Smps Primary I.c.
• Manufacturer: STMicroelectronics

ELECTRICAL CHARACTERISTICS (continued)
ERROR AMPLIFIER SECTION
PWM COMPARATOR SECTION
SHUTDOWN AND OVERTEMPERATURE SECTION
V
Symb ol
Symb ol
V
Symb ol
V
V
I
I
V
COMPLO
COMPHI
COMPL O
I
COMPHI
COMPof f
t
V
A
COMPth
G
T
Dpeak
DI Ssu
T
DDreg
H
G
DDreg
VOL
t
t
hyst
BW
t sd
d
b
ID
m
VDD Regulation Point
Total Variation
Unity G ain Bandwidth
Open Loop Voltage
Gain
DC T ransconductance
Output Low Level
Output High Level
Output Low Current
Capability
Output High Current
Capability
V
Peak Current Limitation V
Current Sense Delay
to turn-off
Blanking Time
Restart threshold
Disable Set Up T ime
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
V
COMP
COMP
Parameter
Parameter
Parameter
offset
/ I
Dpea k
I
T
From Input = V
CO MP pin is open (see fig. 8)
CO MP pin is open (see fig. 8)
V
I
I
V
V
V
I
I
(see fig. 4)
(see fig. 4)
(see fig. 6)
(see fig. 6)
COMP
COMP
COMP
Dp eak
D
J
COMP
COMP
COMP
COMP
DD
= 0.4 A
= 0 to 100
= 12 V
= 0 mA (see fig.1)
= 10 mA
= -400 A
= 400 A
= 2.5 V
= 2.5 V
= 2.5 V
= 1 to 3 V
Test Cond ition s
Test Cond ition s
Test Cond ition s
o
COMP pin open
C
DD
(see fig. 1)
to Output = V
V
V
V
V
DD
DD
DD
DD
= 14 V
= 12 V
= 14 V
= 12 V
COMP
Min.
Min.
Min.
12.6
TBD
TBD
TBD
140
1.3
VIPer20B / VIPer20BSP
Typ .
-600
Typ .
Typ .
150
600
250
300
160
1.5
0.2
4.5
2.3
0.5
0.5
1.7
13
50
34
2
Max.
Max.
Max.
13.4
T BD
T BD
T BD
5
mA/V
Un it
KHz
Un it
Un it
V/A
dB
o
o
ns
ns
%
V
V
V
V
A
V
C
C
A
A
s
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