GE Industrial Solutions GigaTLynx - Manual (Page 10)

Data Sheet
September 7, 2011 GigaTLynx TM SMT Non-isolated Power Modules:
4.5 – 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
LINEAGE POWER 10
voltages. The POL Programming Tool, available at
www.lineagepower.com under the Design Tools section,
helps determine the required external trim resistor
needed for a specific output voltage.
Table 1
V
O, set
(V) Rtrim (KΩ)
0.7 Open
1.0 46.6
1.2 28
1.5 17.5
1.8 12.7
V
O
(+)
TRIM+
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
Vout
TRIM −
Figure 25. Circuit configuration to program output
voltage using an external resistor.
Remote Sense
The GigaTLynx TM SMT power modules have differential
Remote Sense to minimize the effects of distribution
losses by regulating the voltage at the Remote Sense pin.
The voltage between the SENSE pin and VOUT pin must
not exceed 0.5V. Note that the output voltage of the
module cannot exceed the specified maximum value.
This includes the voltage drop between the SENSE and
Vout pins. When the Remote Sense feature is not being
used, connect the SENSE pin to the VOUT pin.
Voltage Margining
Output voltage margining can be implemented in the Giga
TLynx
TM modules by connecting a resistor, R
margin-up
, from
the Trim pin to the ground pin for margining-up the output
voltage and by connecting a resistor, R
margin-down
, from the
Trim pin to output pin for margining-down. Figure 26
shows the circuit configuration for output voltage
margining. The POL Programming Tool, available at
www.lineagepower.com under the Design Tools section,
also calculates the values of R
margin-up
and R
margin-down
for a
specific output voltage and % margin. Please consult
your local Lineage Power technical representative for
additional details.
Monotonic Start-up and Shutdown
The Giga TLynx TM modules have monotonic start-up and
shutdown behavior for any combination of rated input
voltage, output current and operating temperature range.
Startup into Pre-biased Output
The Giga TLynx TM modules can start into a prebiased
output as long as the prebias voltage is 0.5V less than
the set output voltage. Note that prebias operation is not
supported when output voltage sequencing is used.
Figure 26. Circuit Configuration for margining Output
voltage.
Output Voltage Sequencing
The Giga TLynx TM modules include a sequencing feature,
EZ-SEQUENCE TM that enables users to implement
various types of output voltage sequencing in their
applications. This is accomplished via an additional
sequencing pin. When not using the sequencing feature,
leave it unconnected.
When an analog voltage is applied to the SEQ pin, the
output voltage tracks this voltage until the output reaches
the set-point voltage. The final value of the SEQ voltage
must be set higher than the set-point voltage of the
module. The output voltage follows the voltage on the
SEQ pin on a one-to-one basis. By connecting multiple
modules together, multiple modules can track their output
voltages to the voltage applied on the SEQ pin.
For proper voltage sequencing, first, input voltage is
applied to the module. The On/Off pin of the module is
left unconnected or tied to GND so that the module is ON
by default. After applying input voltage to the module, a
minimum 10msec delay is required before applying
voltage on the SEQ pin. Alternatively, input voltage can
be applied while the unit is OFF and then the unit can be
enabled. In this case the SEQ signal must be applied
10ms after the unit is enabled. This delay gives the
module enough time to complete its internal power-up
soft-start cycle. During the delay time, the SEQ pin may
be held to ground.
After the 10msec delay, an analog voltage is applied to
the SEQ pin and the output voltage of the module will
track this voltage on a one-to-one volt bases until the
Vo
MODULE
TRIM–
TRIM+
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down