Vicor PFC MegaPAC-HPEL Power Factor Corrected AC-DC Switchers - Manual (Page 16)

UG:119 vicorpower.com Applications Engineering: 800 927.9474 Page 16
Signal Ground (J10-10)
Signal Ground (see Figure 4 and Connector Pin Identification below) is an isolated
ground reference for all J10 interfacing signals, and can be used for ConverterPAC
output status signals such as Power Good. This is not the same as Earth Ground on input
power connector J9.
Enable/Disable (J10-1 to J10-8)
The Enable/Disable control pins allow ConverterPAC outputs to be set either on or off.
J10-1 through J10-8 are the control pins for output positions 1 through 8, respectively
(see Figure 5 and Connector Pin Identification above). For DualQPACs, both outputs are
set on or off by the same control pin. In parallel arrays, only the driver ConverterPAC
need be controlled. The Enable/Disable pins must be pulled low to less than 0.7 V with
respect to Signal Ground to disable the outputs. They will sink 10 mA maximum. These
pins should be open circuited or allowed to exceed 4.5 V when enabled. Do not apply
more than 6 V to these inputs at any time. If driven from an electromechanical switch or
relay, a capacitor should be connected to eliminate the effects of switch bounce.
Figure 4.
Interface Connector
J10-9
J10-10
J10-11
J10-12 Vcc +5V, 0.3A
SIGNAL GROUND
AC POWER OK
GEN SHUTDOWN
J10 INTERFACE
J10-1
J10-2
J10-3
J10-4
J10-5
J10-6 J10-7
J10-8 E/D-1
E/D-2
E/D-3
E/D-4
E/D-5
E/D-6 E/D-7
E/D-8
12 11 10 9 8 7
6 5 4 3 2 1
J10
Figure 5.
Enable/Disable and
General Shutdown
PFC MegaPAC-EL
1
10
12
Signal Ground
General Shutdown
Enable/Disable Output 1
J10
1
0
TTL "1" (OFF)
TTL "0" (ON)
9
Vcc
Using external transistors to
drive enable/diable logic