GE Industrial Solutions 12V PicoTLynx 6A - Manual (Page 13)

GE
Data Sheet
12V PicoTLynx TM 6A: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.59Vdc to 5.5Vdc output; 6A Output Current
May 2, 2013 ©2013 General Electric Company. All rights reserved. Page 13
0
10
20
30
40
50
60
70
80
90
0.5 1.5 2.5 3.5 4.5 5.5
Output Voltage(Volts)
R
ippl
e
(
m
V
p
-p
)
1x10uF External Cap
1x47uF External Cap
2x47uF External Cap
4x47uF External Cap
Figure 41. Output ripple voltage for various output
voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47
µF ceramic capacitors at the output (6A 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, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-
12 (EN60950-1) Licensed.
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 fast-acting
fuse with a maximum rating of 6A in the positive input lead.
Feature Descriptions
Remote Enable
The 12V Pico TLynx TM 6A power modules feature an On/Off
pin for remote On/Off operation. Two On/Off logic options
are available. In the Positive Logic On/Off option, (device
code suffix “4” – see Ordering Information), the module turns
ON during a logic High on the On/Off pin and turns OFF
during a logic Low. With the Negative Logic On/Off option,
(no device code suffix, see Ordering Information), the module
turns OFF during logic High and ON during logic Low. The
On/Off signal is always referenced to ground. For either
On/Off logic option, leaving the On/Off pin disconnected will
turn the module ON when input voltage is present.
For positive logic modules, the circuit configuration for using
the On/Off pin is shown in Figure 42. When the external
transistor Q1 is in the OFF state, the internal PWM Enable
signal is pulled high through an internal 1.5M
Ω resistor and
the external pullup resistor and the module is ON. When
transistor Q1 is turned ON, the On/Off pin is pulled low and
the module is OFF. A suggested value for R
pullup
is 20k Ω.
1.5MEG
Q1
GND
ON/OFF
VIN+
_
+ PWM Enable
I
V
ON/OFF
MODULE
Rpullup
ON/OFF
2.05K
Figure 42. Circuit configuration for using positive On/Off
logic.
For negative logic On/Off modules, the circuit configuration
is shown in Fig. 43. The On/Off pin should be pulled high with
an external pull-up resistor (suggested value for the 4.5V to
14V input range is 20Kohms). When transistor Q2 is in the
OFF state, the On/Off pin is pulled high, transistor Q1 is
turned ON and the module is OFF. To turn the module ON,
Q2 is turned ON pulling the On/Off pin low, turning transistor
Q1 OFF resulting in the PWM Enable pin going high.