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Features

20 watt output power Independently regulated outputs Open-frame design 85 % efficiency 500 V isolation Overvoltage protection Fast transient response

Short-circuit protection Remote enable Industry-standard pin-out UL 1950 Bellcore 1089 CISPR 22 Class A EN60950
M20W Series - Power Module
Electrical Specifications
Nominal Input .........................................48 V Output Voltage..............................5 & 3.3 V Output Current...........................3.5 & 5.5 A Ripple + Noise (mV pkpk) typ. .......30 & 20 Efficiency (typ.) ...................................87 %
General Information
The M20W power module is a member of Bourns industrial temperature range, dualoutput family. The system designer obtains flexibility in choosing 5 V and 3.3 V components based on the ability of the module to supply either voltage over a wide power range to the load. The output voltages are tightly and independently regulated, thus eliminating the common problem of cross regulation errors between the outputs. The M20W is capable of 20 W combined output power. The module is designed with Bourns' resonant primary and synchronous secondary topology for enhanced reliability and high efficiency, allowing high-temperature operation.
Input Specifications
Voltage ......................................36 VDC Min. 48 VDC Nom. 75 VDC Max. 40 V at Startup Undervoltage Lockout ....................35 VDC Inrush Current ................1 A @ 75 Vin Max. Remote Enable High = Enable.........................2 VDC Min. Low = Disable .......................1 VDC Max. E/D Current .........................................1 mA Isolation Voltage .......500 V Input to Output
Product Dimensions
47.50 (1.870) Bottom View +3.3 Vout Gnd +5 Vout Gnd +Vin 100 f / 100 V -Vin 49.28 (1.94) 1.65 (.065) 3.3 Vout 3 x 220 f 10 V 3.3 Vreturn 5 Vout 3 x 2200 f 10 V 5 Vreturn
3.30 (.130)
49.02 (1.93) 1.65 (.065)
+Vin -Vin Remote Enable
Output Specifications
Power.............................................0 to 20 W Current 3.3 V .......................................0.9 to 4.5 A 5 V .............................................0.6 to 3 A OCP Trip Point .........................150 % Imax Voltage Setpoint Accuracy.......2 % Vnom Line Regulation .....................0.1 % Vnom Load Regulation ...........................0.1 % Vnom (3.3 Vout) 0.6 % Vnom (5 Vout) Dynamic Response 3.3 V Output, 1.5 A step ..............................50 mV (Di/Dt = 1 A/s) 60 s (Di/Dt = 1 A/s) 5 V output, 1 A step ..............................50 mV (Di/Dt = 1 A/s) 300 s (Di/Dt = 1 A/s) Temperature Regulation ......0.2 %Vout/C
Enable
3.30 (.130) 47.63 (1.875)
STANDOFF 2.03 4 PLCS. (0.08)
Dimensions are to the center of the standoff pad. Pad dimensions are 1.52 x 4.95 (0.060 x 0.195).
DIMENSIONS = MILLIMETERS (INCHES)
Temperature Derating
16.0 14.0 Total Power (watts) 12.0 10.0 8.0 6.0 4.0 2.0 0.0 0 10 20 30 40 50 60 70 80 90 Ambient Temperature, C Still Air
General Specifications
MBTF ..............3,400 kHrs Full Power, 40 C Operating Temperature..........-40 to +85 C Full Power, 200 LFM Storage Temperature...........-55 to +125 C Switching Frequency .....................300 kHz Weight ...............................................26 gm
How to Order
M 20W -48 D 5-3-3
Configuration M = Module Current/Power (Watts) Input Voltage (Volts) Outputs D = Dual Output Voltage (Volts)
Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
Reliable Electronic Solutions
Asia-Pacific: TEL +886- (0)2 25624117 * FAX +886- (0)2 25624116 Europe: TEL +41-41 768 5555 * FAX +41-41 768 5510 The Americas: TEL +1-951 781-5500 * FAX +1-951 781-5700
www.bourns.com
COPYRIGHT(c) 2004, BOURNS, INC. LITHO IN U.S.A., REV. 01/05

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