MOR283R3S Datasheet, PDF (1/16 Pages) Interpoint Corporation Company – DC/DC CONVERTERS 28 VOLT INPUT

FEATURES
• –55°C to +125°C operation
• 16 to 40 VDC input
• Fully isolated
DC/DC CONVERTERS
28 VOLT INPUT
MOR SERIES
120 WATT
• Magnetic feedback
• Fixed frequency 550 kHz typ.
• Topology – Single Ended Forward
MODELS
VDC OUTPUT
• Will withstand transients of
up to 50 V for up to 120 msec.
• Output trim 60% to 110%
• Input and output side inhibit
• Remote sense
• Synchronization
SINGLES
3.3
5
6.3
9.5
12
15
DUALS
±3.3
±5
±6.3
±9.5
±12
±15
• Parallel up to 5 units
• Output short circuit protection
• Up to 80 W/in³, 87% efficiency
Size (max): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm) case U2
Case U2 (flanged, short leads) and case Z (tabbed, leads bent down)
are shown in the picture. Also available: flanged – leads bent down
(case V); tabbed – short leads (case Y) and leads bent up (case W).
See Section B8, cases U2, V, W, Y, and Z for dimensions and options.
Weight: 110 grams typical
Screening: Standard, ES, or 883 (Class H). See Section C2 for screening options,
see Section A5 for ordering information.
DESCRIPTION
With up to 120 watts of output power, the MOR Series™ of DC/DC
converters operates from a standard 28 volt bus and offers a wide
input range of 16 to 40 VDC. Full operation over the military temper-
ature range, –55°C to +125°C, makes the MOR Series an ideal
choice for military, aerospace, space, and other high reliability appli-
cations. In compliance with MIL-STD-704D, the converters will with-
stand transients of up to 50 volts for up to 120 milliseconds. Use
Interpoint’s FME28-461 EMI filter to pass MIL-STD-461C, CE03
requirements.
The MOR Series converters incorporate a single-ended forward
topology which uses a constant frequency Pulse Width Modulator
(PWM) current mode control design and switches at 550 kHz,
nominal. The converters also provide short circuit protection by
restricting the current to 125% of the full load output current. All
models offer two inhibits, one referenced to input common and one
referenced to output common. A remote sense function is available
on single output models.
Using the trim function, the MOR Series can provide any output from
2 to 33 VDC. For example, trimming the two 15 volt outputs of the
15 dual (MOR2815D) to 14 volts, and then stacking the outputs will
provide a 28 volt output. See Figure 11.
Positive
Input
Input
Common
Inhibit 1
1.7 µΗ 0.5 µΗ
Bias
Supply
6 µF
0.1 Ω
6 µF
0.015 µF
500 V
FET
Driver
3:2
1.3 µΗ 0.1 µΗ
Positive
Output
600 µF
100 Ω
600 µF
100 Ω
Positive
Sense
Sense
Return
0.015 µF
500 V
Share
Function
Output
Common
Share
Secondary V_CC
V_S+
UVLO
V_In
PWM
Controller
+
Trim
_
V_Ref
Sync In
Sync Out
Sync
In / Out
Secondary V_CC
Inhibit 2
FIGURE 1: SIMPLIFIED SCHEMATIC – MOR2805S, SINGLE 5 VOLT OUTPUT – TYPICAL VALUES
1