Datasheet
SLUS610 − JULY 2004
24
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APPLICATION INFORMATION
If the selected converter cannot tolerate any voltage excursions below VIN− potential, an alternative is to drive
the enable through an optocoupler. An implementation is shown in Figure 29.
UDG−20178
V
DD
10 µA
C
IN
EN
GATE
12
13
10
9
ISENS
DRNSNS
RSENSE
VOUT+
VOUT−
VIN+
VIN−
DC/DC
CONVERTER
Q1
8
−VIN
D1
BAS19
11
RTN
R7
−48
V
GND
PG
TPS2393A*
*Additional details omitted for clarity.
Figure 27. PG Driving An Optocoupler