Datasheet

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ULS 30-Watt Series
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
MDC_ULS-30W_C07 Page 17 of 30
FUNCTIONAL SPECIFICATIONS, ULS-15/2-D48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
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 030W
Output Current
Current-limited, no damage, short-circuit
protected
02A
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 Specifi cations Table is not implied or recommended.
INPUT
Conditions ➀ ➂
Operating voltage range 36 48 75 Vdc
Recommended External Fuse Fast blow 2 A
Start-up threshold Rising input voltage 32.5 33.5 35.5 Vdc
Undervoltage shutdown Falling input voltage 31 32 33 Vdc
Turn-On/Turn-Off Hysteresis 1.42 1.48 1.52 Vdc
Overvoltage shutdown None Vdc
Reverse Polarity Protection None, install external fuse None Vdc
Internal Filter Type Capacitive
Input current
Full Load Conditions Vin = nominal 0.7 0.714 A
Low Line Vin = minimum 0.94 0.95 A
Inrush Transient 0.05 A
2
-Sec.
Output in Short Circuit 100 200 mA
No Load Iout = minimum, unit = ON 25 50 mA
Shut-Down Input Current (Off, UV, OT) 510mA
Refl ected (back) ripple current ➁
Measured at input with specifi ed fi lter 15 30 mA, p-p
GENERAL and SAFETY
Effi ciency Vin = 48V, full load 87.5 89.0 %
Vin = min., full load 87.5 89.0 %
Isolation
Isolation Voltage Input to output, continuous 2250 Vdc
Insulation Safety Rating basic
Isolation Resistance 100 M
Isolation Capacitance 1600 pF
Safety
Certifi ed 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
fi xed, Tambient = +25°C
3 Hours x 10
6
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency 280 290 310 KHz
Startup Time Power on to Vout regulated 30 mS
Startup Time Remote ON to Vout regulated 30 mS
Dynamic Load Response
50-75-50% load step, settling time to within
1% of Vout
200 300 µSec
Dynamic Load Peak Deviation same as above ±250 ±300 mV
FEATURES and OPTIONS
Remote On/Off Control ➄
“N” suffi x:
Negative Logic, ON state ON = Ground pin or external voltage -0.1 0.8 V
Negative Logic, OFF state OFF = Pin open or external voltage 2.5 15 V
Control Current Open collector/drain 1 2 mA
“P” suffi x:
Positive Logic, ON state ON = Pin open or external voltage 10 15 V
Positive Logic, OFF state OFF = Ground pin or external voltage 0 0.7 V
Control Current Open collector/drain 1 2 mA
SMT Mounting "M" suffi x