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