EJR Series
Rev F
Single & Dual Outputs
10 Watt DC/DC Converter
2:1 Wide Input Voltage Range
“Economy” Version of JR Series
FEATURES
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Basic Isolation
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RoHS Compliant
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Typical Efficiency: 81%
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Single and Dual Outputs
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2:1 Wide Input Voltage Range
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Economy Version of JR Series
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No Minimum Load Requirement
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Remote Control (48V Models Only)
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Trim Function (Single Outputs Only)
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Industry Standard Footprint: 2” x 1” x 0.4”
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Approved to IEC/EN60950, UL60950 Safety Standards
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Over Current & Short Circuit Protection (48V Single Output Models Only)
SPECIFICATIONS:
EJR Series
All specifications apply @ ±25°C ambient unless otherwise noted
For 48V models only
INPUT SPECIFICATIONS
Input Voltage Range ...........12V nominal input............. 9 - 18VDC
24V nominal input........... 18 - 38VDC
48V nominal input........... 36 - 75VDC
Remote Control
(for 48V input models only)
(Positive Logic) ..............High = on ..................... 3.5 to 10VDC
Low = off.................... -0.7 to 0.8VDC
(Negative Logic).............Low = on.................... -0.7 to 0.8VDC
High = off ..................... 3.5 to 10VDC
Remote Control Current......................... 2mA max. (positive logic)
4mA max. (negative logic)
PROTECTION
(3.3V & 5V single output, 48V input models)
Over Current Protection (3.3V, 5V)..........> 120% Io, auto-recovery
Short Circuit Protection (3.3V, 5V).........Continuous, auto-recovery
GENERAL SPECIFICATIONS
Efficiency .......................................................................... see table
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature .......................... -40°C to +55°C (ambient)
Storage Temperature ............................................ -55°C to+125°C
Operating Case Temperature ............................... -40°C to +100°C
Temperature Coefficient .............................................. <±0.02%/°C
MTBF...................................................................>2,000,000 hours
OUTPUT SPECIFICATIONS
Output Current ................................................................ see table
Output Voltage................................................................ see table
Voltage Adjustability (single outputs only)........... 90% to 110% Vo
Voltage Setpoint Accuracy.....................................±1.0% Vo max.
Line Regulation......................................................±0.2% Vo max.
Load Regulation.......................................................0.5% Vo max.
Maximum Power .................................................................... 10W
Ripple/Noise .........................< 50mVp-p max. (12V & 24V inputs)
< 50mVp-p max. (48V input, dual output)
< 100mVp-p max. (48V input, single output)
Transient Response...................................................200mV max.
Recovery < 200μs max.
(25% load step change from 50% Io)
di/dt: 1A/10μs
PHYSICAL SPECIFICATIONS
Dimensions............................. 50.80(L) x 25.40(W) x 10.16(H) mm
2.0(L) x 1.0(W) x 0.4(H) inches
Weight ....................................................................................23.3g
SAFETY
Safety Standards ...................................... IEC/EN60950, UL60950
Due to advances in technology, specifications subject to change without notice
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
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