VIPER27 STMicroelectronics, VIPER27 Datasheet - Page 7

• Manufacturer Part Number: VIPER27
• Description: VIPerPlus family: fixed frequency high performance off line high voltage converter
• Manufacturer: STMicroelectronics

VIPER27
Table 8.
Feed-back pin
CONT pin
Current limitation
Oscillator section
Over current protection (2
Overvoltage protection
VCONT_l Low level clamp voltage
V
R
T
Symbol
T
V
V
FBbmhys
STROBE
I
V
FB(DYN)
ON_MIN
I
D
F
V
DMAX
I
D_BM
H
t
FBolp
FBbm
FM
I
Dlim
t
FD
FBlin
LEB
OSC
MAX
OVP
SS
td
FB
FB
Over load shutdown threshold
Linear dynamics upper limit
Burst mode threshold
Burst mode hysteresis
Feed-back sourced current
Dynamic resistance
ΔV
Max drain current limitation
Soft-start time
Minimum turn ON time
Propagation delay
Leading edge blanking
Peak drain current during burst mode
VIPER27L
VIPER27H
Modulation depth
Modulation frequency
Maximum duty cycle
Second over current threshold
Overvoltage protection threshold
Overvoltage protection strobe time
Controller section
FB
/ ΔI
D
Parameter
nd
OCP)
Doc ID 15133 Rev 5
Voltage falling
Voltage rising
V
3.3 V < V
V
I
V
I
T
V
V
V
VIPER27L
VIPER27H
CONT
CONT
J
FB
FB
FB
FB
DD
FB
= 25 °C
< 3.3 V
= 0.3 V
= 4 V,
= 0.6 V
= 1 V
= operating voltage range,
= -100 µA
= -10 µA
FB
Test condition
< 4.8 V
-150 -200 -280
0.66
Min
220
103
4.5
3.2
2.7
14
54
70
2
Typ Max Unit
100
400
100
300
160
115
250
4.8
3.5
0.6
0.5
0.7
8.5
2.2
60
±4
±8
-3
Electrical data
1
3
0.74
480
127
5.2
3.7
3.3
21
66
80
6
kHz
kHz
kHz
kHz
V/A
mV
mA
ms
μA
μA
kΩ
Hz
ns
ns
ns
us
%
7/31
V
V
V
V
A
A
V