100
50 to 75 Watt 2.28x2.40 Inch Package M
o Efficiency to 86%
o 300 kHz Switching Frequency
o 2:1 Input Range
o Regulated Single Output
o Continuous Short Circuit Protection
o Half Brick Size Meet Industrial Standard
MODEL NUMBER INPUT
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT
CURRENT
INPUT CURRENT
%EFF
NO LOAD FULL LOAD
75MRS12W2.5LC
9-18 VDC
2.5 VDC
15 A
50 mA
4.110 mA 76
75MRS12W3.3LC 3.3 VDC 5.290 mA 78
75MRS12W5LC 5 VDC 7.715 mA 81
75MRS12W12LC 12 VDC 6.25 A
7.440 mA
84
75MRS12W15LC 15 VDC 5 A 84
75MRS12W24LC 24 VDC 3.13 A 84
75MRS24W2.5LC
18-36 VDC
2.5 VDC
15 A
50 mA
2.029 mA 77
75MRS24W3.3LC 3.3 VDC 2.610 mA 79
75MRS24W5LC 5 VDC 3.810 mA 82
75MRS24W12LC 12 VDC 6.25 A
3.675 mA 85
75MRS24W15LC 15 VDC 5 A
75MRS24W24LC 24 VDC 3.13 A 3.640 mA 86
75MRS48W2.5LC
36-75 VDC
2.5 VDC
15 A
50 mA
1.015 mA 77
75MRS48W3.3LC 3.3 VDC 1.305 mA 79
75MRS48W5LC 5 VDC 1.883 mA 83
75MRS48W12LC 12 VDC 6.25 A
1.838 mA 85
75MRS48W15LC 15 VDC 5 A
75MRS48W24LC 24 VDC 3.13 A 1.820 mA 86
MODEL NUMBER INPUT
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT
CURRENT INPUT CURRENT
%EFF
V1 V2 MIN.
1/2
MAX.
1/2 NO LOAD FULL LOAD
75MRD48W5/2.5LC
36-75 VDC
5 VDC 2.5 VDC
1/0 A 15/15 A 30 mA 1.860 mA 84
75MRD48W5/3.3LC 5 VDC 3.3 VDC
M + R Multitronik GmbH
Kaninchenbergweg 78 • 23564 Lübeck • Germany
Tel. (+49) 0451 / 60 99 50 • Fax (+49) 0451 / 60 46 95
www.multitronik.com
info@multitronik.com
vertrieb@mrmultitronik.de
101
SPECIFICATIONS
All Specifications Typical At Nominal Line, Full Load, and 25°C Unless Otherwise Noted
INPUT SPECIFICATIONS
Input Voltage Range 2:1
Undervoltage lockout
12 Vin power up
12 Vin power down
24 Vin power up
24 Vin power down
48 Vin power up
48 Vin power down
8.8 V
8 V
17 V
16 V
34 V
32.5 V
Positiv Logic Remote ON/OFF3)
For Negative Logic Remote ON/OFF please add Suffix "R"
Input Filter Pi Type
OUTPUT SPECIFICATIONS
Voltage Accuracy ±1% max.
Transient Response 25% Step Load Change <500µ sec.
External Trim Adj. Range ±10%
Ripple and Noise, 20 MHz BW
2.5V/3.3V/5V 20mV RMS max.
75mV p-p max.
12V/15V 30mV RMS max.
100mV p-p max.
24V 100mV RMS max.
240mV p-p max.
Temperature Coefficient ±0.03%/°C
Short Circuit Protection Continuous
Line Regulation1) ±0.2% max.
Load Regulation2) ±0.2% max.
Over Voltage Protection trip Range, % Vo nom. 115-140%
Current Limit 110% ~ 140% Nominal Output
GENERAL SPECIFICATION
Efficiency see table
Isolation Voltage
Input/Output
Input/Case
Output/Case
1.500 VDC min.
1.500 VDC min.
1.500 VDC min.
Isolation Resistance 10 MOhms min.
Switching Frequency 12/24 Vin
48 Vin
400kHz typ.
300kHz typ.
Operating Case Temperature Range -40°C to +100°C
Storage Temperature Range -55°C to +105°C
Thermal Shut down, Case Temp. +100°C typ.
Case Material Aluminium
Dimensions 2.28x2.40x0.5 Inches
(57.9x61.0x12.7 mm)
Case "M"
1) Measured from High Line to Low Line
2) Measured from Full Load to Zero Load
3) Logic Compatibility ... Open Collector ref to -Input
Module ON ... Open Circuit
Module OFF ... <0.8 VDC
PIN CONNECTIONS
1+INPUT
2REMOTE
CONTROL
3 CASE
4-INPUT
5-OUTPUT
6-SENSE
7TRIM
8 +SENSE
9+OUTPUT
Remote ON/OFF Control
The 50MRS/75MRS allows the user to switch the module on and off electronically by remote on/off feature. The 50MRS/
75MRS are available in "positive logic" or "negative logic" (option) versions for remote on/off.
External Output Trimming
Output may optionally be externally
trimmed (±10%) with a fixed resistor
or an external trimpot as shown.
External Output
Output Noise
The output noise is measured with 10µF tantalum capacitor and 1.0µF ceramic capacitor across output.
All Specifications Typical At Nominal Line, Full Load and 25°C Unless Otherwise Noted.
102
Logic State
(PIN2) Negative Logic Positive Logic
Logic Low-
Switch Closed Module on Module off
Logic High-
Switch Open Module off Module on
Application Note
Derating
The operating case temperature range of 50MRS... series is -40°C to +100°C. When operating the 50MRS..., proper
derating or cooling is needed.
The following curve is the derating curve of 50MRS... without heat sink.
Forced Convection Power Derating with No Heat Sink
The operating case temperature range of 75MRS... series is -40°C to +100°C. When operating the 75MRS..., proper
derating or cooling is needed.
The following curve is the derating curve of 75MRS... without heat sink
Forced Convection Power Derating with No Heat Sink
Where:
The power dissipation (Pd):
PD = Pi - Po = Po (1- η ) / η
The thermal resistance are list below:
Chart of Thermal Resistance vs Air
Flow:
The temperature rise (∆T): ∆T = Pd * Rca
103
AIR FLOW RATE TYPICAL Rca
Natural Convection 7.12°C/W
100 ft./min. 6.21°C/W
200 ft./min. 5.17°C/W
300 ft./min. 4.29°C/W
400 ft./min. 3.64°C/W
