GE Industrial Solutions GigaTLynx - Manual (Page 12)

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 12
adjust the voltage loop feedback compensation of the
module.
Figure. 28. Circuit diagram showing connection of
R
TUME
and C
TUNE
to tune the control loop of the
module.
Recommended values of R
TUNE
and C
TUNE
for different
output capacitor combinations are given in Tables 2 and
3. Table 2 shows the recommended values of R
TUNE
and
C
TUNE
for different values of ceramic output capacitors up
to 2000uF that might be needed for an application to
meet output ripple and noise requirements. Selecting
R
TUNE
and C
TUNE
according to Table 2 will ensure stable
operation of the module.
In applications with tight output voltage limits in the
presence of dynamic current loading, additional output
capacitance will be required. Table 3 lists recommended
values of R
TUNE
and C
TUNE
in order to meet 2% output
voltage deviation limits for some common output voltages
in the presence of a 25A to 50A step change (50% of full
load), with an input voltage of 12V.
Please contact your Lineage Power technical
representative to obtain more details of this feature as
well as for guidelines on how to select the right value of
external R-C to tune the module for best transient
performance and stable operation for other output
capacitance values or input voltages other than 12V.
Table 2. General recommended values of of R
TUNE
and
C
TUNE
for Vin=12V and various external ceramic
capacitor combinations.
Table 3. Recommended values of R
TUNE
and C
TUNE
to
obtain transient deviation of ≤2% of Vout for a 25A
step load with Vin=12V.
RTUNE
GND
TRIM+
MODULE
TRIM-
RTrim
SENSE+
CO1
SENSE-
VOUT
CTUNE
C
O
1 x 47uF 2x47uF 4x47uF 6x47uF 10 x 47uF 20 x 47uF
R
TUNE
330 330 330 330 270 270
C
TUNE
330pF 560pF 1200pF 1800pF 2200pF 5600pF
V
O
1.8V 1.2V 0.7V
C
O
5x47uF +
8x330uF
polymer
5x47uF +
13x330uF
polymer
5x47uF +
22x330uF
polymer
R
TUNE
220 180 100
C
TUNE
47nF 120nF 330nF
ΔV 35mV 23mV 14mV