Datasheet

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SLUS536C − AUGUST 2002 − REVISED AUGUST 2004
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25
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
ISENS
DRNSNS
RSENSE
VOUT+
VOUT−
VIN+
VIN−
DC/DC
CONVERTER
Q1
−VIN
D1
BAS19
RTN
R7
−48 V
GND
PG
TPS2392*
TPS2393*
*Additional details omitted for clarity.
See block diagram on page 15 and 16 for pinout.
Figure 30. PG Driving An Optocoupler