GE Industrial Solutions Naos Raptor 50A - Manual (Page 10)

Data Sheet
October 31, 2011 Naos Raptor 50A: Non Isolated Power Module:
5 – 14Vdc input; 0.6Vdc to 2.0Vdc Output; 50A output current
LINEAGE POWER 10
Over Temperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit will
shut down if the overtemperature threshold of 105ºC
is exceeded at the thermal reference point T
red
. 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.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, module operation is disabled. The module will
begin to operate at an input voltage above the
undervoltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the Naos Raptor 50A module
can be programmed to any voltage from 0.6Vdc to
2.0Vdc by connecting a resistor between the Trim +
and Trim - pins of the module. Without an external
resistor between Trim + and Trim - pins, the output of
the module will be 0.6Vdc. To calculate the value of
the trim resistor, Rtrim for a desired output voltage,
use the following equation:
Ω
−
= k
Vo
Rtrim
) 6 . 0 (
2 . 1
Rtrim is the external resistor in kΩ
Vo is the desired output voltage
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
V
O, set
(V) Rtrim (KΩ)
0.6 Open
0.8 6.00
1.0 3.00
1.2 2.00
1.5 1.333
1.8 1.000
By using a ±0.1% tolerance trim resistor with a TC of
±25ppm, a set point tolerance of ±1% can be
achieved as specified in the electrical specification.
The POL Programming Tool available at
www.lineagepower.com under the Design Tools
section, helps determine the required trim resistor
needed for a specific output voltage.
V
O
(+)
TRIM+
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
Vout
TRIM −
Figure 24. Circuit configuration for programming
output voltage using an external resistor.