GE Industrial Solutions 12V Mega TLynx - Manual (Page 11)

Data Sheet
May 4, 2012 12V Mega TLynx TM : Non-Isolated DC-DC Power Modules:
6.0 – 14Vdc Input; 0.8Vdc to 3.63Vdc Output; 30A output current
LINEAGE POWER 11
0
20
40
60
80
100
120
140
0.5 1 1.5 2 2.5 3
Output Voltage (Volts)
R
ippl
e (
m
V
p
-p
)
1x10uF External Cap
1x47uF External Cap
2x47uF External Cap
4x47uF External Cap
Figure 29. Output ripple voltage for various
output voltages with external 1x10 µF, 1x47 µF,
2x47 µF or 4x47 µF ceramic capacitors at the
output (30A load). Input voltage is 12V.
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 2nd Edition,
CSA C22.2 No. 60950-1-07, and VDE 0805-
1+A11:2009-11 (DIN EN60950-1 2nd Edition)
Licensed. The APTS030A0X were tested using a
30A, time delay fuse in the ungrounded input.
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. The input to these
units is to be provided with a time-delay fuse with a
maximum rating of 30A in the positive input lead.
Feature Descriptions
Remote On/Off
The 12V Mega TLynx TM power modules feature a
On/Off pin for remote On/Off operation. If not using
the On/Off pin, connect the pin to ground (the
module will be ON). The On/Off signal (V
on/off
) is
referenced to ground. The circuit configuration for
remote On/Off operation of the module using the
On/Off pin is shown in Figure 30.
During a Logic High on the On/Off pin (transistor Q1
is OFF), the module remains OFF. The external
resistor R1 should be chosen to maintain 3.0V
minimum on the On/Off pin to ensure that the
module is OFF when transistor Q1 is in the OFF
state. Suitable values for R1 are 4.7K for input
voltage of 12V and 3K for 5Vin. During Logic-Low
when Q1 is turned ON, the module is turned ON.
The On/Off pin can also be used to synchronize the
output voltage start-up and shutdown of multiple
modules in parallel. By connecting On/Off pins of
multiple modules, the output start-up can be
synchronized (please refer to characterization
curves). When On/Off pins are connected together,
all modules will shutdown if any one of the modules
gets disabled due to undervoltage lockout or over
temperature protection
.
100K
Q1
GND
PWM Enable
ON/OFF
VIN+
ON/OFF
_
+
I
V
MODULE
R1
ON/OFF
1K
100K
Thermal SD
Figure 30. Remote On/Off Implementation
using ON/OFF .
Overcurrent Protection
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.