Data Sheet
Naos Raptor 3A: Non-isolated DC-DC Power Modules
December 6, 2010
4.5 – 14Vdc input; 0.59Vdc to 6Vdc Output; 3A output current
in the electrical specification table. Optimal
performance of the module can be achieved by using
the Tunable LoopTM feature described later in this data
sheet.
Feature Descriptions
Remote On/Off
The Naos Raptor 3A power modules feature an On/Off
pin with positive logic for remote On/Off operation. If the
On/Off pin is not being used, leave the pin open (the
module will be ON, except for the -49 option modules
where leaving the pin open will cause the module to
remain OFF). The On/Off signal is referenced to ground.
During a Logic High on the On/Off pin, the module
remains ON. During Logic-Low, the module is turned
OFF.
40
1x10uF External Cap
1x47uF External Cap
2x47uF External Cap
4x47uF External Cap
30
20
10
0
MODULE
VIN
10K
30.1K
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Output Voltage(Volts)
R1
100K
ENABLE
Figure 47. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or
4x47 µF ceramic capacitors at the output (3A load).
Input voltage is 12V.
2.2K
2.2K
ON/OFF
47K
47K
GND
Safety Considerations
For safety agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards,
i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE
0850:2001-12 (EN60950-1) Licensed.
Figure 48. Remote On/Off Implementation. Resistor
R1 is absent in the -49Z option module.
Overcurrent Protection
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power
module has extra-low voltage (ELV) outputs when all
inputs are ELV.
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current limiting
continuously. At the point of current-limit inception, the
unit enters hiccup mode. The unit operates normally
once the output current is brought back into its specified
range. The average output current during hiccup is 10%
The input to these units is to be provided with a fast-
acting fuse with a maximum rating of 5A in the positive
input lead. As an option to using a fuse, no fuse is
required, if the module is
IO, max
.
1. powered by a power source with current limit
protection set point less than the
Overtemperature Protection
recommended protection device value, and
To provide protection in a fault condition, these modules
are equipped with a thermal shutdown circuit. The unit
will shut down if the overtemperature threshold of 130ºC
is exceeded at the thermal reference point Tref. The
thermal shutdown is not intended as a guarantee that
the unit will survive temperatures beyond its rating.
Once the unit goes into thermal shutdown it will then
wait to cool before attempting to restart.
2. the module is evaluated in the end-use
equipment.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, the module operation is disabled. The module will
begin to operate at an input voltage above the
undervoltage lockout turn-on threshold.
LINEAGE POWER
14
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
