Datasheet

RBE-12/20-D48 Series
Eighth-Brick 240-Watt Isolated DC/DC Converters
MDC_RBE-12-20-D48.B05Δ Page 3 of 16
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FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Conditions ➀
Minimum Typical/Nominal Maximum Units
Input Voltage, Continuous Full power operation, full temperature range 0 80 Vdc
Input Voltage, Transient
Operating or non-operating, tested:
100 mS max. duration
0 100 Vdc
Isolation Voltage Input to output 2250 Vdc
Input Reverse Polarity None, install external fuse None Vdc
On/Off Remote Control Power on or off, referred to -Vin 0 15 Vdc
Output Power 0 237.51 W
Output Current
Current-limited, no damage,
short-circuit protected
020A
Operating Ambient Temperature Range With derating -40 85 °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 nor recommended.
INPUT
Conditions ➀ ➂
Operating voltage range 36 48 75 Vdc
Voltage Transient (100ms duration) 100 Vdc
Recommended External Fuse Fast blow 15 A
Start-up threshold Rising input voltage 32 33 34 Vdc
Undervoltage lockout Falling input voltage 30 31 32 Vdc
Reverse Polarity Protection None, install external fuse None Vdc
Internal Filter Type Pi
Input current
Full Load Conditions 5.16 5.44 A
Low Line Vin = minimum 6.99 7.33 A
Inrush Transient Vin = 48V 0.05 A
2
-Sec.
Short circuit Input current 150 800 mA
No Load Input Current Iout = minimum, unit = ON, Vin = 48V 80 150 mA
Shut-Down Mode Input Current (Off, UV, OT) 510mA
Refl ected (back) ripple current ➁
Measured at input with specifi ed fi lter 70 200 mA, pk-pk
Pre-biased startup External voltage < Vset 0 Monotonic V
GENERAL and SAFETY
Effi ciency Vin = 48V 91 94.5 %
Vin = 75V 90 93 %
Isolation
Isolation Voltage – no baseplate Input to output, continuous 2250 Vdc
Isolation Voltage – with baseplate Input to output, continuous 2250 Vdc
Isolation Voltage, Input to baseplate 1500 Vdc
Isolation Voltage, Output to baseplate 1500 Vdc
Insulation Safety Rating basic
Isolation Resistance 10 Mohm
Isolation Capacitance 1500 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 2, Method 1, Class 1,
GF Tambient = +25C
2.1 Hours x 10
6
DYNAMIC CHARACTERISTICS
Fixed Switching Frequency 200 KHz
Startup Delay
Power ON 10% Vout to 90% Vout
(50% resistive load)
15 mS
Rise time
Remote ON to 10% Vout, Vin = 48V
(50% resistive load)
15 mS
Dynamic Load Response
50-75-50% load step,
settling time to within ±1% of Vout.
(48Vin, 470uF output capacitance, 1A/uS)
2000 µSec
Dynamic Load Peak Deviation same as above ±600 mV
FEATURES and OPTIONS
Remote On/Off Control ➅
“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 Sinking 1 2 mA
“P” suffi x:
Positive Logic, ON state ON = Pin open or external voltage 3.5 15 V
Positive Logic, OFF state OFF = Ground pin or external voltage 0 1 V
Control Current Sinking 1 2 mA
Base Plate “B” suffi x