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ACInput
12V
MPF
6660
50 W
LH0063
50 W
47 W
Input
20V
10 Fm
47 Fm
UC1708
PWR
GND
Logic
Gnd
C
L
Output
200kHz
tr 0.5V/RS
tf 0.5/RS
DutyCycle-50%
³
³
4.3V
OUTPUT
0V
20V
INPUT
0V
TP
HL
TT
LH
TP
LH
TT
HL
50%
50%
90%
90%
10%
10%
5.6V
8kW
A/B
Input
Shutdown
500 W
10kW
10kW
2.5pF
5.6V
5.6V
To A/B
Output
Enable
V
IN
450 Am
5.6V
Internal
Bias
Under
Voltage
Lockout
To A/B
Output
UC1708
UC2708
UC3708
SLUS171C – MARCH 1997 – REVISED SEPTEMBER 2007
Figure 1. AC Test Circuit and Switching Time Waveforms
NOTE: Shutdown feature available only in JE, NE or DW Packages.
Figure 2. Equivalent Input Circuits
Copyright © 1997 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): UC1708 UC2708 UC3708