Datasheet

DRQ-12/42-D48 Series
500W Digital Fully Regulated
Intermediate DC-DC Bus Converter
MDC_DRQ-12/42-D48.A03 Page 3 of 24
www.murata-ps.com/support
FUNCTIONAL SPECIFICATIONS
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 2250 Vdc
On/Off Remote Control Power on, referred to -Vin 0 13.5 Vdc
Output Power 0 515.5 W
Output Current
Current-limited, no damage, short-circuit
protected
0 43.5 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 Specifi cations Table is not implied or recommended.
INPUT
Conditions ➀ ➂
Operating voltage range 38 48 75 Vdc
Recommended External Fuse Fast blow 25 A
Start-up threshold: (measured @ no load) Rising input voltage 37 37.5 38 Vdc
Undervoltage shutdown: (measured @ no load) Falling input voltage 35 35.5 36 Vdc
Internal Filter Type Pi
Input current
Full Load Conditions Vin = nominal 11.39 11.68 A
Low Line Vin = minimum 14.55 14.63 A
Inrush Transient 0.15 0.30 A
2
-Sec.
Short Circuit Input Current 0.05 0.1 A
No Load Input Current Iout = minimum, unit = ON 130 200 mA
Shut-Down Input Current (Off, UV, OT) 10 20 mA
Refl ected (back) ripple current ➁
Measured at input with specifi ed fi lter 40 70 mA, p-p
Pre-biased startup External output voltage < Vset Monotonic
GENERAL and SAFETY
Effi ciency Vin = 48V, full load 95.5 %
Vin = min., full load 95.5 %
Isolation
Isolation Voltage Input to output 2250 Vdc
Isolation Voltage Input to baseplate 1500 Vdc
Isolation Voltage Output to baseplate 1500 Vdc
Insulation Safety Rating Functional
Isolation Resistance 10 M
Isolation Capacitance 1500 pF
Safety
Certifi ed to UL-60950-1, CSA-C22.2 No. 60950-
1, IEC/60950-1, 2nd edition
Yes
Calculated MTBF
Per Telcordia SR332, issue 1, class 3, ground
fi xed, Tambient = +25°C
1.3 Hours x 10
6
DYNAMIC CHARACTERISTICS
Switching Frequency Variable frequency control (default) 175-250 KHz
Vin Start up delay time 25 30 mS
Enable Start up delay time 35mS
Rise time 15 20 mS
Vout Fall Time of Regulated Off: (from 100%
to 0%)
18 20 22 mS
Dynamic Load Response
50-75-50% load step, settling time to within 1%
of Vout (Cout=1000µF)
200 300 µSec
Dynamic Load Peak Deviation same as above ±400 ±600 mV
FEATURES and OPTIONS
Remote On/Off Control ➃
“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 3.5 13.5 V
Control Current Open collector/drain 5 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 0.8 V
Control Current Open collector/drain 1 mA