Avago ACPL-P346, Руководство пользователя

Страница: 7 / 9

7
Table 1. Power Supply Schemes
V
cc1
V
cc2a
V
eea
S2a S3a
D4a/
R7a V
cc2b
V
eeb
S2b S3b
D4b/
R7b Remarks
1 +5 V
External
+12V~20V
External
0 V s/c s/c NM Bootstrapped
from V
cc2a
(+12V~20V)
0 V s/c s/c NM Default (simplest)
- Two external supplies needed
for V
cc1
and V
cc2a
2 +5 V
External
+12V~20V
External
0 V s/c s/c NM +12V~20V
External
0 V s/c s/c NM Higher Power
- Three external supplies needed
for V
cc1
, V
cc2a
and V
cc2b
3 +5 V
External
+15V~24V External open open 12V/
1k
+15V~24V External open open 12V/1k V
ee
available
- Three external supplies needed
for V
cc1
, V
cc2a
and V
cc2b
- Virtual gnds V
ea
and V
eb
generated through D4 and R7
12V -3V~-12V 12V -3V~-12V
4 +5 V
External
DC/DC
(=V
cc1
/+12V)
0 V s/c s/c NM Bootstrapped
from V
cc2a
(+12V)
0 V s/c s/c NM Cheap
- One single output DC/DC
converter for V
cc2a
- Only one external supply is
needed (V
cc1
)
5 +5 V
External
DC/DC
(=V
cc1
/+12V)
0V s/c s/c NM DC/DC
(=V
cc1
/+12V)
0 V s/c s/c NM Higher Power
- Two single output DC/DC
converters for V
cc2a
and V
cc2b
- Only one external supply is
needed (V
cc1
)
6 +5 V
External
DC/±DC
(=V
cc1
/±12V) open
s/c NM DC/±DC
(=V
cc1
/±12V) open
s/c NM V
ee
available
- Two dual output DC/DC
converters for V
cc2a
,V
cc2b
, V
eea
and V
eeb
- Only one external supply is
needed (V
cc1
)
+12V -12V +12V -12V
7 +5 V
External
DC/±DC
(=V
cc1
/±9V)
open open 12V/
1k
DC/±DC
(=V
cc1
/±9V)
open open 12V/1k V
ee
available
- Dual output DC/DC converters
for V
cc2a
and V
cc2b
- only 1 external supply is
needed (V
cc1
)
- Virtual gnds V
ea
and V
eb
generated through D4 and R7
+12V -6V +12V -6V
Note: As TVS D2 voltage is selected at a breakdown voltage of 12.2 V, it is not advised to set both V
cc2
and V
ee
voltage at a voltage beyond ±12 V.
To use a voltage higher than 12 V, please replace D2 with a bigger clamping voltage.