FMTR SERIES
30 WATT
DC/DC CONVERTERS
TRIM AND REMOTE SENSE (AVAILABLE ON SINGLE OUTPUT MODELS ONLY)
FMTR SINGLE OUTPUT CONVERTER
FMTR SINGLE OUTPUT CONVERTER
8
10
8
10
OUTPUT
COMMON
+V
OUTPUT
COMMON
IN
+V
IN
1
SENSE
2
2
SENSE
RETURN
9
RETURN
9
R
R
L
L
12
12
SENSE
1
SENSE
R
T
INPUT
COMMON
POSITIVE
OUTPUT
INPUT
COMMON
POSITIVE
OUTPUT
7
11
7
11
EXTERNAL TRIM CONNECTION
REMOTE SENSE CONNECTION
1
Make connections at converter.
2
Make connections at load.
2, 3
FIGURE 3: REMOTE SENSE
1, 2, 3
FIGURE 2:TRIM CONNECTION
Notes for Remote Sense and Trim
Trim Formulas
1. When trimming output voltage and/or remote sensing, the total
output voltage increase must be less than 0.6 volts at the converters
pins to maintain specified performance.
2. If neither voltage trim nor remote sense will be used, connect pin 9
to pin 10 and pin 11 to pin 12 or the output voltage will increase by
1.2 volts
3. CAUTION: The converter will be permanently damaged if the posi-
tive remote sense (pin 12) is shorted to ground. Damage may also
result if the output common or positive output is disconnected from
the load with the remote sense leads connected to the load.
Vout = desired output voltage; Rt = trim resistor
3.3V: Rt = 1300 Vout – 4304
*
1.2475
5V: Rt = 1300 Vout – 6512
*
1.2475
12V: Rt = 1300 Vout – 15631
*
1.2475
15V: Rt = 1300 Vout – 19498
*
1.2475
PIN OUT
Angled corner indicates pin one.
Pin
1
Single Output
Sync
Dual Output
Sync
2
Inhibit/Sync Rtn Inhibit/Sync Rtn
3
Filter Out Rtn
Filter Out
Filter Out Rtn
Filter Out
1
2
12
11
10
9
4
5
Inhibit
Inhibit
TOP VIEW
3
6
No connection
Input Common
28 V Input
Sense Rtn
No connection
Input Common
28V Input
FMTR
(Pin side, marked side)
7
4
5
6
8
9
No connection
8
10
11
12
Output Common Negative Output
7
Positive Output
Positive Sense
Output Common
Positive Output
See page 7 for dimensions.
FIGURE 4: PIN OUT
4
CRANE [ Crane Aerospace & Electronics. ]
