Datasheet

Automotive Line – ENA75 Series
75W VEHICLE DC/DC CONVERTER
20121213
AUTOMOTIVE LINE
www.powerbox.info
Features
• Ruggeddesign
• 300kHzswitchingfrequency
• Wideinputrange
• Continuousshortcircuitprotection/reversedinput
 polarityprotection
• Automaticlowvoltageswitchoff
• SuitableforpoweringindustrialPCsystemsin
 automotiveapplications
• 2Vhysteresison/offforinputvoltage
Specifications
INPUT
Nominal voltage range 9-36, 18-72, 50-150VDC.
Tolerance See input undervoltage shut off section.
Frequency DC.
Input undervoltage The power supply contains a circuit that will
shut off shut off the unit when the input voltage is
below the low threshold. The unit will not
start until the input voltage have been above the high
threshold for a specified time. Factory preset.
Input source current Input current at Uin=58V (Pout = 60W): <1,4A.
Input current at Uin=50V (Pout = 60W): <1,6A.
Efficiency Efficiency at Pout = 60W
Uin=72V: >78%.
Uin=96V: >78%.
Grounding Both input and output voltage are isolated
from chassie. Decoupling capacitor to chassie
are used on all inputs and outputs.
Input fusing The DC/DC converter is overload protected
and will limit input current. However a
fused, 3,4-4 A slow blow, supply source is
recommended.
Hold up capability Energy reserve
At 60W load, Uin = 63 VDC: >1ms.
OUTPUT
Power 75W contiuous.
Output voltages See table.
Ripple and noise <100mVp-p DC to 20MHz over nominal
input voltage range. <300mV at operating
temperature below –30°C.
Derating Derate output power to 60% at Uin<12.5VDC
(9-36VDC version).
PROTECTION
Low input voltage The unit is equipped with a low input voltage
protection protection circuit. The supply will only start up
if the input voltage has been above a certain
threshold for a certain time. This circuit will
prevent uncontrolled oscillations when
operated from a voltage source with high
impedance, (eg. Long supply cables with
significant conductor resistance).
Input polarity protection Input is protected against continuous
connection of reversed polarity of at least 1,2
x Uin by the use of a series diode.
Output short circuit Continuous short circuit protection.
Typical characteristics: see drawing.
Overtemperature Overtemperature protection.
Temperature coefficient ±0.03%/°C.
Short circuit protection Continuous.
Line regulation ±0.2% max. Min 0.25A load required.
Load regulation ±0.2% max. Min 0.25A load required.
Overvoltage prot. trip range 115-140%, % Vo nom.
Current limit 110%-160% nominal output.