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 % 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 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 Product Dimensions Bottom View 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 -Vin 1.65 (.065) 100 µf / 100 V -Vin Gnd +Vin 49.02 (1.93) 3.3 Vout 3 x 220 µf 10 V 3.3 Vreturn +Vin +3.3 Vout 49.28 (1.94) +5 Vout Remote Enable 1.65 (.065) Gnd 5 Vout 3 x 2200 µf 10 V 5 Vreturn Enable 3.30 (.130) 47.63 (1.875) DIMENSIONS = MILLIMETERS (INCHES) 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). Temperature Derating 16.0 14.0 Total Power (watts) General Specifications 47.50 (1.870) 3.30 (.130) 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/µs) 60 µs (Di/Dt = 1 A/µs) 5 V output, ±1 A step ..............................50 mV (Di/Dt = 1 A/µs) 300 µs (Di/Dt = 1 A/µs) Temperature Regulation ......±0.2 %Vout/°C 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. 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 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© 2004, BOURNS, INC. LITHO IN U.S.A., REV. 01/05