Datasheet

DocID14419 Rev 9 7/32
VIPER17 Electrical data
32
I
DD_FAULT
Operating supply current, with
protection tripping
400 μA
I
DD_OFF
Operating supply current with V
DD
< VDD_off
V
DD
= 7 V 270 μA
Table 7. Supply section (continued)
Symbol Parameter Test condition Min Typ Max Unit
Table 8. Controller section
Symbol Parameter Test condition Min Typ Max Unit
Feed-back pin
V
FBolp
Overload shut down threshold 4.5 4.8 5.2 V
V
FBlin
Linear dynamics upper limit 3.2 3.3 3.4 V
V
FBbm
Burst mode threshold Voltage falling 0.4 0.45 0.6 V
V
FBbmhys
Burst mode hysteresis Voltage rising 50 mV
I
FB
Feed-back sourced current
V
FB
= 0.3 V -150 -200 -280 uA
3.3 V < V
FB
< 4.8 V -3 uA
R
FB(DYN)
Dynamic resistance V
FB
< 3.3 V 14 19 kΩ
H
FB
∆V
FB
/ ∆I
D
49V/A
CONT pin
VCONT_l Low level clamp voltage I
CONT
= -100 μA0.5V
Current limitation
I
Dlim
Max drain current limitation
(1)
V
FB
= 4 V,
I
CONT
= -10 μA
T
J
= 25 °C
0.38 0.4 0.42 A
t
SS
Soft-start time 8.5 ms
T
ON_MIN
Minimum turn ON time 220 400 480 ns
td Propagation delay 100 ns
t
LEB
Leading edge blanking 300 ns
I
D_BM
Peak drain current during burst
mode
V
FB
= 0.6 V 90 mA
Oscillator section
F
OSC
VIPER17L
V
DD
= operating voltage range,
V
FB
= 1 V
54 60 66 kHz
VIPER17H 103 115 127 kHz
FD Modulation depth
VIPER17L ±4 kHz
VIPER17H ±8 kHz
FM Modulation frequency 250 Hz
D
MAX
Maximum duty cycle 70 80 %
1. I
Dlim
@ V
DD
lower than 10 V can range between -5% and +15%.