Datasheet

UWQ-12/20-T48 Series
Wide Input, Isolated DOSA Quarter Brick DC-DC Converters
MDC_UWQ-12/20-T48 Series.A02 Page 3 of 29
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FUNCTIONAL SPECIFICATIONS, UWQ-12/20-T48
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Minimum Typical/Nominal Maximum Units
Input Voltage, Continuous Full power operation 18 48 70 Vdc
Input Voltage, Transient
Operating or non-operating,
100 mS max. duration
75 Vdc
Isolation Voltage Input to output 2250 Vdc
On/Off Remote Control Power on or off, referred to -Vin 0 13.5 Vdc
Output Power 0 247.2 W
Output Current
Current-limited, no damage,
short-circuit protected
020A
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 18 48 60 Vdc
Recommended External Fuse Fast blow 20 A
Start-up threshold Rising input voltage 16 16.75 17.5 Vdc
Undervoltage shutdown Falling input voltage 14.75 15.5 16.75 Vdc
Internal Filter Type L-C
Input current
Full Load Conditions Vin = nominal 5.43 5.72 A
Low Line Vin = minimum 14.65 15.34 A
Inrush Transient Vin = 48V. 0.05 0.1 A2-Sec.
Output in Short Circuit 50 100 mA
No Load input current (T48xT models) Iout = minimum, unit = ON 80 150 mA
No Load input current (all other models) Iout = minimum, unit = ON 90 150 mA
Shut down mode input current 58mA
Refl ected (back) ripple current ➁
Measured at input with specifi ed fi lter 15 25 mA, RMS
Pre-biased startup External output voltage < Vset Monotonic
GENERAL and SAFETY
Effi ciency Vin=48V, full load 90 92 %
Vin=min 89.5 91 %
Isolation
Isolation Voltage, input to output With or without baseplate 2250 Vdc
Isolation Voltage, input to baseplate With baseplate 1500 Vdc
Isolation Voltage, output to baseplate With baseplate 1500 Vdc
Insulation Safety Rating basic
Isolation Resistance 100 M
Isolation Capacitance 1500 pF
Safety (certifi ed to the following
requirements)
UL-60950-1, CSA-C22.2 No.60950-1,
IEC/60950-1, 2nd edition
Yes
Calculated MTBF
Per Telcordia SR-332, issue 1, class 3, ground
fi xed, Tambient = +25°C
TBD Hours x 10
3
DYNAMIC CHARACTERISTICS (T48xT models)
Fixed Switching Frequency 250 275 300 KHz
Startup Time Power On, to Vout regulation band 60 65 mS
Startup Time Remote ON to Vout Regulated 60 65 mS
Dynamic Load Response 50-75-50% load step to 3% error band 220 275 µSec
Dynamic Load Peak Deviation same as above ±500 ±700 mV
DYNAMIC CHARACTERISTICS (all other models)
Fixed Switching Frequency 180 200 220 KHz
Startup Time Power On, to Vout regulation band 10 20 mS
Startup Time Remote ON to Vout Regulated 10 20 mS
Dynamic Load Response 50-75-50% load step to 3% error band 200 250 µSec
Dynamic Load Peak Deviation same as above ±1100 ±1300 mV
FEATURES and OPTIONS
Remote On/Off Control ➃
“N” suffi x:
Negative Logic, ON state ON = pin grounded or external voltage 0 1 Vdc
Negative Logic, OFF state OFF = pin open or external voltage 3.5 13.5 Vdc
Control Current open collector/drain 1 2 mA
“P” suffi x:
Positive Logic, ON state ON = pin open or external voltage 3.5 13.5 V
Positive Logic, OFF state OFF = ground pin or external voltage 0 1 V
Control Current open collector/drain 1 2 mA
Base Plate "B" suffi x optional