VIPER28 STMicroelectronics, VIPER28 Datasheet - Page 7

• Manufacturer Part Number: VIPER28
• Description: VIPerPlus family: fixed frequency high performance off line high voltage converter
• Manufacturer: STMicroelectronics

VIPER28
Table 8.
Feed-back pin
CONT pin
Current limitation
Oscillator section
VCONT_l
V
R
T
Symbol
V
V
FBbmhys
V
ON_MIN
I
FB(DYN)
D
F
D_BM
I
t
H
FBolp
FBbm
FM
I
Dlim
t
FD
LEB
FBlin
OSC
MAX
td
FB
SS
FB
Controller section
Over-load shut down threshold
Linear dynamics upper limit
Burst mode threshold
Burst mode hysteresis
Feed-back sourced current
Dynamic resistance
ΔV
Low level clamp voltage
Max drain current limitation
Soft-start time
Minimum turn ON time
Propagation delay
Leading edge blanking
Peak drain current during burst mode V
VIPER28
VIPER28
Modulation frequency
Maximum duty cycle
Modulation depth
FB
/ ΔI
D
L
H
Parameter
Doc ID 15028 Rev 4
Voltage falling
Voltage rising
V
3.3 V < V
V
I
V
T
V
range, V
VIPER28
VIPER28
CONT
J
FB
FB
FB
FB
DD
= 25 °C
< 3.3 V
= 0.3 V
= 4 V, I
= 0.6 V
= operating voltage
= -100 µA
Test condition
FB
FB
L
H
CONT
= 1 V
< 4.8 V
= -10 µA
-150
0.75
Min
220
103
4.5
3.2
14
54
70
2
-200
0.80
Typ
100
400
100
300
160
115
250
4.8
3.5
0.6
0.5
8.5
±4
±8
60
-3
Electrical data
-280
Max
0.85
480
127
5.2
3.7
20
66
80
6
Unit
kHz
kHz
kHz
kHz
V/A
mV
mA
ms
uA
uA
kΩ
Hz
ns
ns
ns
%
V
V
V
V
A
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