SI9120 Vishay Siliconix, SI9120 Datasheet - Page 4

• Manufacturer Part Number: SI9120
• Description: Universal Input Switchmode Controller
• Manufacturer: Vishay Siliconix

Si9120
Vishay Siliconix
www.vishay.com
4
TIMING WAVEFORMS
TYPICAL CHARACTERISTICS
OUTPUT
SENSE
V
CC
SHUTDOWN
0
0
−
RESET
50%
V
V
1.5 V −
CC
CC
FIGURE 1.
0
0
−
−
t
d
t
r
50%
v 10 ns
90%
100 k
10 k
1 M
50%
10 k
Output Switching Frequency
vs. Oscillator Resistance
r
t
OSC
SW
FIGURE 3.
− Oscillator Resistance (W)
t
LW
100 k
50%
SHUTDOWN
OUTPUT
50%
V
V
CC
CC
t
1 M
0
0
r
, t
f
v 10 ns
−
−
t
RW
50%
FIGURE 2.
50%
t
SD
S-42042—Rev. H, 15-Nov-04
t
f
v 10 ns
Document Number: 70006
90%