DC SERIES
TO 20 WATTS
UP TO 20 WATTS - DC SERIES
SURFACE MOUNT CONVERTER
FEATURES:
• Output trim function
• Overvoltage protection
• High efficiency (to 88%)
• Six sided shield
• Undervoltage lockout
• Remote On/Off
• Short-circuit protection
• UL/CUL 1950, file #E155800
THE DC SERIES FROM WALL INDUSTRIES
The DC surface mount series offers the user a wide input
range and single output with tight regulation. These converters
are highly reliable and well suited for telecom applications.
SPECIFICATIONS: DC SERIES
All specifications apply at 25° C ambient unless otherwise noted.
INPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Input Voltage Range ........48V Nominal input ..........36-75VDC
Input Voltage Lockout ......DC-DC On............................36VDC
DC-DC Off............................33VDC
Efficiency (nominal input and full load).......................see table
Isolation voltage.................................................1600VDC, min
9
Isolation resistance.............................................10 ohms, min
Input Filter (Note 1)......................................................L-C type
Input Voltage Variation .....dv/dt..............................5V/ms, max
(complies with ETS300 132 part 4.4)
Input Surge Voltage .........48V Input (100mS max).....100VDC
Input Reflected Ripple (Note 2) ..................................25mAp-p
(nominal Vin at full load)
Start Up Time ...................nom. Vin & const. res. load....25mS
Remote On/Off (Note 3)...DC-DC On....Open or 3.5V<Vr<12V
DC-DC Off......Short or 0V<Vr<1.2V
Isolation capacitance ..............................................500pF, max
Switching frequency...............................................300KHz, typ
Approvals & standards.................IEC60950,UL1950,EN60950
Potting material..............................................Epoxy (UL94-V0)
Dimensions...........................................1.95 x 1.19 x 0.38 Inch
Weight...............................................................32.5g (1.15 oz)
6
MTFB (Note 5) .................................................1.632 x 10 hrs
ENVIRONMENTAL SPECIFICATIONS
Operating temp. range...................-40ºC ~ +85ºC(w/ derating)
Maximum case temp. ....................................................+100ºC
Storage temp. range ........................................-55ºC ~ +105ºC
Thermal impedence .........(natural convection).........14ºC/Watt
Thermal shock...................................................MIL-STD-810D
Vibration ................10~55Hz, 2G, 30 minutes along X,Y and Z
Relative humidity ...............................................5% to 95% RH
Remote off input current ..nominal Vin............................2.5mA
OUTPUT SPECIFICATIONS
Output Power .....................................................20 Watts, max
Voltage accuracy..............full load and nominal Vin ..........±1%
Voltage adjustability..........................................................±10%
Minimum load.......................................................................0%
Line regulation..................LL to HL at Full Load.............±0.2%
Load regulation ................10% to 100% FL....................±0.5%
Ripple and noise (Note 4).................2, 3.3V: 50mV, 75mVp-p
Temperature Coefficient .................................±0.02%/ ºC, max
Transient resp rec time ....(25% load step change)........300uS
Over voltage protection....2.0 & 3.3V output .....................3.9V
EMC CHARACTERISTICS
Conducted emissions.......EN55022..............................Level A
Radiated emissions..........EN55022..............................Level A
ESD..................................EN61000-4-2.............Perf. Criteria2
Radiated immunity ...........EN61000-4-3.............Perf. Criteria2
Fast transient ...................EN61000-4-4.............Perf. Criteria2
Surge................................EN61000-4-5.............Perf. Criteria2
Conducted immunity ........EN61000-4-6.............Perf. Criteria2
..(Zener diode clamp)
5V output..................................6.2V
12V output.................................15V
15V output.................................18V
Due to advances in technology, specifications subject to
change without notice.
Over load protection ....% of FL at nom out ...150% max
Short circuit protection.........Hiccup, automatic recovery
3/18/04
1
603 778 2300
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