
15
2051 4.4 3/15/01
SMH4803A
Preliminary
SUMMIT MICROELECTRONICS, Inc.
Figure 9. Expanding Input Monitoring Capability
Note: Figures 7 through 11
—
the *10
resistor must be located as close as possible to the MOSFET
100k
MMBTA06LT1
RT
68k
1k
*10
10nF
100V
MMBD1401
100nF
100k
MMBTA06LT1
100nF
50V
100nF
50V
10nF
100V
UV
OV
PD1#
PD2#
FAULT#
RESET#
V
E
E
PG3#
PG2#
5VREF
SMH4803A
PG1#
V
C
V
D
0V
–
48V
10k
10k
R1
RD
6.8k
100μF
100V
R3
MODE
1M
R2
RS
20m
0V
–
48V
100k
MMBTA06LT1
2
EN/TS
1k
100nF
50V
+
–
LMV
339
+
–
+
–
+
–
EN1
EN4
EN2
EN3
10k
2051 Fig09