KR/KRW Series
Single and Dual Outputs
2:1 and 4:1 Wide Input Voltage Range
FEATURES
APPLICATIONS
● 6 Watts Output Power
● Measurement
● Output Current up to 1A
● Wireless Network
● Telecom/Datacom
● Industry Control System
● Semiconductor Equipment
● High Efficiency up to 83%
● Fixed Switching Frequency
● Six-Sided Continuous Shield
● Standard 2 x 1 x 0.4 inch Package
● 2:1 and 4:1 Wide Input Voltage Range
● ISO9001 Certified Manufacturing Facilities
● Compliant to RoHS EU Directive 2002/95/EC
● Options: Positive Logic and Negative Logic Remote ON/OFF, Industrial Temperature
SPECIFICATIONS: KR/KRW Series
All specifications apply @ 25°C ambient unless otherwise noted
INPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Input Voltage Range
Efficiency ........................................................................................see table
KR .............................. 12V nominal input.............................. 9-18VDC
24V nominal input............................ 18-36VDC
48V nominal input............................ 36-75VDC
Switching Frequency
KR..........................................................................................300KHz typ.
KRW ......................................................................................200KHz typ.
KRW........................... 24V nominal input.............................. 9-36VDC
Isolation Voltage (Input to Output).........................................1600VDC min.
Isolation Resistance ...............................................................109 ohms min.
Isolation Capacitance ................................................................ 300pF max.
48V nominal input............................ 18-75VDC
Input Filter....................................................................................... Pi Type
Input Surge Voltage (100ms max) ....... 12V input ..........................36 VDC
24V input ..........................50 VDC
ENVIRONMENTAL SPECIFICATIONS
48V input ........................100 VDC
Operating Temperature
Input Reflected Ripple Current (nom. Vin and FL)........................20mAp-p
Start Up Time (nom. Vin and constant resistive load)..............450ms max.
Standard .................................................... -25°C ~ +85°C (with derating)
“I” suffix (See Note 7)................................. -40°C ~ +85°C (non-derating)
“I” suffix (KRW series)................................ -40°C ~ +85°C (with derating)
Remote ON/OFF (Option) (See Note 6)
(Positive Logic)............... DC-DC ON.............Open or 3.5V < Vr < 12V
DC-DC OFF.............Short or 0V < Vr < 1.2V
Storage Temperature ..........................................................-55°C ~ +105°C
Maximum Case Temperature............................................................. 100°C
Relative Humidity...................................................................5% to 95% RH
(Negative Logic) ............. DC-DC ON...............Short or 0V < Vr < 1.2V
DC-DC OFF...........Open or 3.5V < Vr < 12V
Input Current of Remote Control Pin (nominal Vin) ...........-0.5mA ~ +1mA
Remote Off State Input Current (nominal Vin)..................................2.5mA
Thermal Impedance (See Note 8)
Natural Convection.............................................................12°C / Watt
Natural Convection with Heat-Sink.....................................10°C / Watt
OUTPUT SPECIFICATIONS
Thermal Shock ..................................................................... MIL-STD-810F
Vibration ................................10~55Hz, 10G, 30 minutes along X, Y, and Z
MTBF (See Note 1) ..........................................................3.145 x 106 hours
Output Voltage..............................................................................see table
Voltage Accuracy (nominal Vin and full load) ...................................... ±1%
Output Current ..............................................................................see table
Output Power......................................................................... 6 Watts max.
Line Regulation (LL to HL at FL)....................................................... ±0.2%
PHYSICAL SPECIFICATIONS
Weight ..................................................................................... 27g (0.95 oz)
Dimensions....................... 2.0 x 1.0 x 0.40 inches (50.8 x 25.4 x 10.2 mm)
Case Material ..............................................................Nickel-coated copper
Base Material...................................................Non-conductive black plastic
Potting material..................................................................Epoxy (UL94-V0)
Shielding......................................................................................... six-sided
Load Regulation (no load to full load) .......... Single Output.............. ±0.2%
Dual Output ................... ±1%
Cross Regulation (Dual) (Asymmetrical load 25% / 100% FL) ............ ±5%
Minimum Load ....................................................................................... 0%
Ripple/Noise (20 MHz BW)...........................................................50mVp-p
Temperature Coefficient ................................................. ±0.02% / °C max.
SAFETY & EMC
Approvals and Standards .................. IEC60950-1, UL60950-1, EN60950-1
Transient Response Recovery Time
25% load step change.................................................... (Single) 200us
EMI .....................................EN55022 ..............................................Class A
FL to HL ±1% error band
(Dual) 200us
Air ± 8KV
ESD ....................EN61000-4-2……..
…….Perf. Criteria B
PROTECTION SPECIFICATIONS
Contact ± 6KV
Over Load Protection (% of full load at nom. input) .................... 170% typ.
Radiated Immunity..............EN61000-4-3............... 10V/m Perf. Criteria A
Fast Transient.....................EN61000-4-4.................±2KV Perf. Criteria B
Surge (See Note 9).............EN61000-4-5.................±1KV Perf. Criteria B
Conducted Immunity...........EN61000-4-6............ 10 Vrms Perf. Criteria A
Short Circuit Protection.............................Continuous, automatic recovery
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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