GE Industrial Solutions 12V PicoTLynx 6A - Manual (Page 17)

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 17
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 470uF 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 3A to 6A step
change (50% of full load), with an input voltage of 12V.
Please contact your GE 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.
Co 1x47 μF 2x47μF 4x47μF 6x47μF 10x47μF
R
TUNE
270 220 150 75 75
C
TUNE
2200pF 4700pF 8200pF 12nF 18nF
Table 3. Recommended values of R
TUNE
and C
TUNE
to obtain
transient deviation of ≤2% of Vout for a 3A step load with
Vin=12V.
Vo 5V 3.3V 2.5V 1.8V 1.2V 0.6V
Co 2x47μF 3x47μF 4x47μF 6x47μF
2x47 μF +
330 μF
Polymer
3 x330 μF
Polymer
R
TUNE
220 180 150 120 100 100
C
TUNE
3900pF 6800pF 10nF 12nF 15nF 120nF
ΔV 87mV 57mV 43mV 32mV 23mV 12mV