SA7x Technical Description
2.5 SA7x Power Supply
Figure 2–7 Power Supply Block Diagram
A SENSE
B SENSE
C SENSE
D SENSE
OUTPUT
REGULA-
TOR A
POWER
OK
OVER-
VOLTAGE
CONTROL
OVER-
CURRENT
CONTROL
OVERTEMP
SHUTDOWN
CONTROL
PANEL
SHUT-
DOWN
PULSE
WITH
MODU-
LATORS
INTERNAL
REGU-
LATED
SUPPLY
300V
SUPPLY
LINE
VOLT-
AGE
SELECT
SWITCH
REGU-
LATORS
+12V A SENSE
+12V D SENSE
LED A
LED C
LED D
LED B
J1
+5V A SENSE
+5V D SENSE
+5V C SENSE
+5V B SENSE
+12V C SENSE
+12V B SENSE
+12V A SENSE
+12V SENSE LINES
+5V SENSE LINES
+5V A SENSE
+5.1V A
+12.1V A
OUTPUT
REGULA-
TOR B
+12V B SENSE
+5V B SENSE
+5.1V B
+12.1V B
OUTPUT
REGULA-
TOR C
+12V C SENSE
+5V C SENSE
+5.1V C
+12.1V C
OUTPUT
REGULA-
TOR D
+12V D SENSE
+5V D SENSE
+5.1V D
+12.1V D
J1
CONTROL A
CONTROL B
CONTROL C
CONTROL D
J1
+12.6V OUT
LATCHED SD
SD
+12.6V SENSE
+12.6V
J1
+5.6V OUT
+5.6V SENSE
+12.6V OC
+5.6V OC
ACOK
J1
THERMAL
SD
ROTATION
J1
ALL
INTERNAL
CIRCUITS
LINE
+300V
SD
LINE
IN
+5.6V SENSE
+12.6V SENSE
BULK SENSE
CXO-1876B
LATCHED SD
ENCLOSURE
TEMP SENSOR
(INTERNAL TO SUPPLY)
SA7x Technical Description 2–13
