YF SERIES
TO 20 WATTS
UP TO 20 WATTS - YF SERIES
ULTRA-WIDE INPUT, LOW QUIESCENT CURRENT
FEATURES
• Single, Dual and Triple Outputs
• Industry Standard Package and Pin-Out
• Pi Input Filter Integral to Converter
• 1600VDC I/O Isolation
• Regulated Output
• Continuous short circuit protection
• Remote On/Off Feature
• UL1950, cUL950, EN60950 and CE MARK
THE YF SERIES FROM WALL INDUSTRIES
The YF series of DC/DC converters performs over an ultra-wide input voltage range (2:1 & 4:1), providing indefinite
short circuit and overvoltage protection. The series’ design technology allows up to 20 watts of output power from a
1.60” x 2.0” x 0.40” case. These current mode control forward converters are designed for improved transient response
and reduced stress on switching components and do not require external input filtering,making it a preferred source over
industry alternatives.
All specifications apply @ +25 C ambient unless otherwise noted.
SPECIFICATIONS: YF SERIES
INPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Input Voltages...9-18,18-36,36-75,9-36,20-75,18-75VDC
Nominal Input.............................................12,24, 48VDC
Remote On/Off Control..........CMOS or TTL (see note 7)
Input Filter......................................................Pi input filter
Efficiency.........................................................83ꢀ typical
Isolation Voltage (input to output)...............1600VDC min.
9
Isolation Resistance (input to output)................10 Ohms
Switching Frequency.................................300kHz typical
5
MTBF......................................MIL217F 5.591x10 hours
OUTPUT SPECIFICATIONS
Output Current...................................................see table
Output Voltage Tolerance.......................................... 2ꢀ
(auxillary triple outputs)......................................... 5ꢀ
Output Trim (external).............................................. 10ꢀ
Line Regulation: full line (single and dual).............. 0.5ꢀ
(triple).............................................. main 1ꢀ, aux. 5ꢀ
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature (case).........................see note 9
Storage Temperature..................................-55 to +105°C
Humidity (non-condensing).........................20 - 95ꢀ R.H.
PHYSICAL SPECIFICATIONS
Weight........................................................approx. 4.0 oz.
Dimensions..............................................1.6 x 2.0 x 0.40”
Case Material..................................Nickel coated copper,
.................................................non-conductive baseplate
Shielding............................................................Six-Sided
Line Regulation: 20 Watt 4:1
Input........................................................................... 1ꢀ
Load Regulation
Singles (25-100ꢀ load).................................... 0.5ꢀ
(NL-100ꢀ load)................................................... 1ꢀ
Duals (50-100ꢀ load)......................................... 1ꢀ
(NL-100ꢀ load)................................................... 5ꢀ
Due to advances in technology, specifications subject to
change without notice.
Short Circuit Protection...................................continuous
Ripple/Noise (20MHz BW) single......................75mV p-p
(dual)..............................................................100mV p-p
(triple) 5V/3.3V=50mV, 12V=120mV, 15V=150mV p-p
Transient Response..........<500µsec to within 1ꢀ Vout
1
603 778 2300
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