TPCMQ DC/DC CONVERTER SERIES
OPERATING MANUAL
17
C O R P O R A T I O N
16.0 DESCRIPTION OF RACK/SHELF CONTROL AND SUPERVISORY SIGNALS
SIGNAL
PIN
DESCRIPTION
Inhibit
1
A logic LO or short to Pin 23 turns off all converter modules
in the rack/shelf. This input is referenced to -Sense, Pin 23.
Overtemp. Warn. - 1
Overtemp. Warn. - 2
Overtemp. Warn. - 3
2
4
6
A logic HI indicates an overtemperature condition inside the
indicated module. The HI occurs a few milliseconds before
the unit shuts down. This signal is referenced to -Sense, Pin
23.
Current Monitor - 1
Current Monitor - 2
Current Monitor - 3
3
5
7
An analog output voltage of the indicated module is pro-
portional to its output current. This signal is referenced to
-Sense, Pin 23.
+5 Standby Supply
8
This is a +5V, 250mA output. It is referenced to the -Sense,
Pin 23.
Current Share
10
This is an analog control signal made up of the current
share signals of all converter modules connected together.
This pin is used to connect to Pin 10 of another identical
converter shelf to share output currents. Output currents
between shelves are shared within an accuracy of 10% of
full load current over a 50% to 100% load range. This signal
is referenced to -Sense, Pin 23.
+ Sense
- Sense
11
23
These remote sense leads should be connected as a
twisted pair to the resp and - load points to provide
regulation at the point of load. Removal of the sense leads
transfers regulation control to the output terminals of the
converter shelf. The correct polarities must be maintained.
Input Power Good - 1
Input Power Good - 2
Input Power Good - 3
14
16
18
A logic LO indicates the DC input is present at each indicat-
ed module. A logic HI indicates DC input failure. This signal
is referenced to -Sense, Pin 23.
Output Power Good - 1
Output Power Good - 2
Output Power Good - 3
15
17
19
A logic LO indicates that the indicated module is operating
properly with output voltage in its controllable range. A logic
HI indicates the output is outside the -25 to +10% output
range for the converter, the unit has failed or is in current
limit. This signal is referenced to -Sense, Pin 23.
