viper50b STMicroelectronics, viper50b Datasheet - Page 5

• Manufacturer Part Number: viper50b
• Description: Smps Primary I.c.
• Manufacturer: STMicroelectronics

ELECTRICAL CHARACTERISTICS (continued)
OSCILLATOR SECTION
ERROR AMPLIFIER SECTION
PWM COMPARATOR SECTION
SHUTDOWN AND OVERTEMPERATURE SECTION
V
Symb ol
Symb ol
V
Symb ol
Symb ol
V
V
I
I
t
V
V
COMPLO
V
COMPHI
COMPL O
I
COMPHI
COMPof f
on( mi n)
t
V
A
COMPth
G
T
F
Dpeak
DI Ssu
T
OSCih
DDreg
H
OSCi l
G
DDreg
VOL
t
t
hyst
SW
BW
t sd
d
b
ID
m
Oscillator F requency
Total Variation
Oscillator Peak Voltage
Oscillator Valley Voltage
VDD Regulation Point
Total Variation
Unity Gain 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
Minimum on T ime
Restart threshold
Disable Set Up Time
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
V
COMP
COMP
Parameter
Parameter
Parameter
offset
Parameter
/ I
Dpea k
I
T
From Input = V
CO MP pin is open (see fig. 10)
CO MP pin is open (see fig. 10)
V
I
I
V
V
V
I
I
(see fig. 4)
(see fig. 4)
(see fig. 8)
(see fig. 8)
COMP
COMP
COMP
Dp eak
D
J
COMP
COMP
COMP
COMP
DD
R
V
with R
(see fig.6 and fig.9)
= 0.5 A
= 0 to 100
DD
T
= 12 V
= 8.2 K
= 0 mA (see fig.1)
= 10 mA
= -400 A
= 400 A
= 9 to15 V
= 2.5 V
= 2.5 V
= 2.5 V
= 1 to 3 V
T
Test Cond ition s
Test Cond ition s
Test Cond ition s
T est Con ditio ns
1%
o
COMP pin open
C
DD
to O utput = V
C
(see fig. 1)
C
V
V
V
V
T
T
DD
DD
DD
DD
=2.4 nF
= 14 V
= 12 V
= 14 V
= 12 V
5%
COMP
Min.
Min.
Min.
Min.
12.6
140
1.1
0.7
90
45
3
Typ .
Typ .
-600
Typ .
Typ .
100
150
600
250
250
350
170
7.1
3.7
1.5
0.2
4.5
0.5
0.5
1.7
13
52
40
2
1
4
VIPER50B/BSP
Max.
Max.
Max.
Max.
13.4
110
360
1.9
1.3
5.4
5
mA/V
Un it
KHz
Un it
KHz
Un it
Un it
V/A
dB
o
o
ns
ns
ns
%
V
V
V
V
V
V
A
V
C
C
A
A
s
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