SMFLHP283R3S_16 Datasheet, PDF (2/15 Pages) Interpoint Corporation Company – SMFLHP Single and Dual DC-DC Converters

Crane Aerospace & Electronics Power Solutions
SMFLHP Single and Dual DC-DC Converters
28 Volt input – 100 Watt
Sense and Trim
Single output models provide sense to maintain voltage at the
load. The converters output voltage can also be trimmed up. See
Figure 1.
Current Sharing and Parallel Operation
For increased power parallel up to 3 converters. The maximum
recommended power is 80% of the total available power. Multiple
SMFLHP converters may be used in parallel to drive a common
load. Only single output models with Sense and Sense Return
can be used in the share mode. In this mode of operation the
load current is shared by two or three SMFLHP converters.
In current sharing mode, one SMFLHP converter is designated as
a master. The Slave pin (pin 11) of the master is left unconnected
and the Master/Inhibit 2 pin (pin 12) of the master is connected to
the Slave pin (pin 11) of the slave units.
The units designated as slaves have the Master/Inhibit 2 pin (pin
12) connected to the Sense Return pin (pin 9) of the master unit.
Figure 2 on page 3 shows the typical setup for two or three
units in parallel.
A second slave unit may be placed in parallel with a master and
slave; this requires the Triple pin (pin 3) of the master unit to be
connected to the Sense Return pins (pin 9) Figure 2.
In current sharing mode, the converters function as a current
source. For this reason it is important that their outputs be
connected to the common ground at all times to prevent an
excessively high voltage at their outputs.
28V ⁺
–
Inhibit
Sync In
+
28V
–
Inhibit
Sync In
1 _{Positive Input}
Master/Inhibit 2 ¹²
2 _{Input Common}
Slave ¹¹
3 _{Triple (TRI)}
Positive Sense ¹⁰
4 _{Inhibit 1}
Sense Return ⁹
5 _{Sync Out}
Output Common ⁸
–
6 _{Sync In}
Positive Output ⁷
+
RL
REMOTE SENSE CONNECTION
1 _{Positive Input}
Master/Inhibit 2 ¹²
2 _{Input Common}
3 _{Triple (TRI)}
Slave ¹¹
Positive Sense ¹⁰
RA
4 _{Inhibit 1}
Sense Return ⁹
5 _{Sync Out}
Output Common ⁸
–
6 _{Sync In}
Positive Output ⁷
+
RL
OUTPUT VOLTAGE ADJUST CONNECTION
V_OUT Increase
Volts
0.1
0.2
0.3
0.4
0.5
3.3 V
66
131
196
262
349
R_A (Ω)
5V
12 V
77
27
153
55
230
82
307
109
396
139
15 V
21
43
64
86
109
Notes
1. When using remote sense for voltage
compensation or when using remote sense
for trim, the output will drift over temperature.
Contact Applications Engineering for more
information [e-mail].
2. Do not exceed the maximum rated power.
Figure 1: Sense Connections and Trim Table – Single Output Models
www.craneae.com/interpoint
Page 2 of 15
Rev AC - 2016.02.17