International Safety Standard Approvals
VDE0805/EN60950/IEC950 File No. 10401-3336-1075
Licence No. 1629
UL1950 File No. E136005
CSA C22.2 No. 950 File No. LR41062C
NFC15 SERIES
Single and dual output
[ 2 YEAR WARRANTY ]
• 4:1 input voltage range
• Low profile 0.46 inch
• 10.2 Watts/cubic inch
• 80% efficiency
• UL, CSA and VDE safety approvals
• Inhibit/sync function
• Overvoltage protection
• Fixed frequency operation
The NFC15 series of DC/DC converters are economical 15 Watt, hybrid DC/DC
converters that accept input voltages ranging from 20VDC to 72VDC. A
constant efficiency of 80% is maintained over the entire input voltage range.
The isolated floating output can be referenced as either positive or negative, or
stacked in series for higher output voltages. All models include current limited
outputs, overvoltage protection and remote on/off. Packaged in a low profile 2.0
x 1.6 x 0.46 inch case, the NFC15 is ideal for space critical applications in
telecommunications, data communications and distributed power networks.
SPECIFICATION
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
PAGE 116
GENERAL SPECIFICATIONS
Efficiency 80% typical
Isolation voltage Input/output 500VDC
Switching frequency Fixed 200kHz ±5.0%
Approvals and VDE0805, EN60950
standards IEC950, UL1950
CSA C22.2 No. 950
Case material Aluminum alloy, hard
black anodized finish
Cover material 10% glass reinforced
polyetherimide GE ULTEM
#2110 or equivalent
Material flammability UL94V-0
Weight 45g (1.6oz)
MTBF MIL-HDBK-217F >436,000 hours
Bellcore 332 >950,000 hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating ambient, -25°C to +60°C
(See Graph 2)
Option (See Note 6) -40°C to +60°C
Non-operating amb. -55°C to +125°C
Max. case temperature, +105°C max.
(See Note 7)
Derating See curve
Cooling Free air convection cooled
OUTPUT SPECIFICATIONS
Voltage accuracy Single output ±1.0%
Dual output ±1.5%
Voltage adjustability All outputs ±10%
Line regulation LL to HL at FL, singles ±0.5% max.
LL to HL at FL, duals ±0.5% max.
Load regulation FL to NL, single output ±1.0% max.
FL to NL, dual output ±5.0% max.
Ripple and noise 5Hz to 20MHz 75mV pk-pk max.
15mV rms
Temperature coefficient ±0.02%/°C, max.
Overvoltage protection See table Clamp
Short circuit protection Continuous
(See Note 8) automatic recovery
INPUT SPECIFICATIONS
Input voltage range 48VDC nominal 20 to 72VDC
Input filter (See Note 5) External capacitor
Input current No load 15mA
Full load 400mA
Remote ON/OFF
Logic compatibility CMOS/TTL
Logic on Logic high or open
Logic off Logic low or Jumper
pin 2 and 4
Frequency Switching frequency
synchronization ±10%
Synchronization Negative going pulse
function on pin 4 max.
25% duty cycle
Surge protection 100V for 100ms