PDF《PRODUCT OVERVIEW》

1 μF ceramic multilayer in parallel with

10 μF electrolytic. I/O caps are necessary for our test equipment and may not be needed for your application. ? Regulation specifications describe output voltage deviations from a nominal/midpoint value to either extreme (50% load step). C RoHS Hazardous Substance Compliance (does not claim EU RoHS exemption 7bClead in solder) C = RoHS-6 - Lx Pin Length Option (Thru-hole only) Blank = Standard pin length 0.180? (4.6mm) L1 = 0.110? (2.79mm) ? L2 = 0.145? (3.68mm) ? M SMT Version Blank = Through-hole mount, no SMT M = Surface mount (MSL Rating 2) ? ? Special quantity order is required;

samples available with standard pin length only. ? SMT (M) versions not available in sample quantities. ? Some model number combinations may not be available. See website or contact your local Murata sales representative. MDC_ULS-30W_C08? Page

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30 FUNCTIONAL SPECIFICATIONS, ULS-3.3/8-D48 ABSOLUTE MAXIMUM RATINGS Conditions ? Minimum Typical/Nominal Maximum Units Input Voltage, Continuous

0 80 Vdc Input Voltage, Transient

100 mS max. duration

100 Vdc Isolation Voltage Input to output, continuous

2250 Vdc Input Reverse Polarity None, install external fuse None Vdc On/Off Remote Control Power on, referred to -Vin

0 15 Vdc Output Power

0 26.66 W Output Current Current-limited, no damage, short-circuit protected

0 8 A Storage Temperature Range Vin = Zero (no power) -55

125 °C Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied or recommended. INPUT Conditions ? ? Operating voltage range

36 48

75 Vdc Recommended External Fuse Fast blow 1.5 A Start-up threshold Rising input voltage

34 35.2

36 Vdc Undervoltage shutdown Falling input voltage

32 34 35.2 Vdc Turn-On/Turn-Off Hysteresis 1.5 Vdc Overvoltage shutdown None Vdc Reverse Polarity Protection None, install external fuse None Vdc Internal Filter Type LC Input current Full Load Conditions Vin = nominal 0.58 0.63 A Low Line Vin = minimum 0.77 0.83 A Inrush Transient 0.05 A2 -Sec. Output in Short Circuit

50 100 mA No Load Iout = minimum, unit = ON

75 100 mA Shut-Down Input Current (Off, UV, OT)

1 2 mA Reflected (back) ripple current ? Measured at input with specified filter

30 mA, p-p GENERAL and SAFETY Efficiency Vin = 48V, full load

89 90 % Vin = min., full load 89.5 90.5 % Isolation Isolation Voltage Input to output, continuous

2250 Vdc Insulation Safety Rating basic Isolation Resistance

10 MΩ Isolation Capacitance

1000 pF Safety Certified to UL-60950-1, CSA-C22.2 No. 60950-1, IEC/EN60950-1, 2nd edition Yes Calculated MTBF Per Telcordia SR332, issue 1, class 3, ground fixed, Tambient = +25°C

2 Hours x

106 DYNAMIC CHARACTERISTICS Fixed Switching Frequency

320 350

380 KHz Startup Time Power on to Vout regulated

50 mS Startup Time Remote ON to Vout regulated

50 mS Dynamic Load Response 50-75-50% load step, settling time to within 2% of Vout

100 150 ?Sec Dynamic Load Peak Deviation same as above ±30 ±100 mV FEATURES and OPTIONS Remote On/Off Control ? N suffix: Negative Logic, ON state ON = Ground pin or external voltage -0.7 1.2 V Negative Logic, OFF state OFF = Pin open or external voltage

10 15 V Control Current Open collector/drain

1 mA P suffix: Positive Logic, ON state ON = Pin open or external voltage

10 15 V Positive Logic, OFF state OFF = Ground pin or external voltage -0.7 1.2 V Control Current Open collector/drain