SLIN-30E1AX Datasheet, PDF (18/26 Pages) Bel Fuse Inc. – 6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs

NON-ISOLATED DC/DC CONVERTERS
6.0 Vdc - 14 Vdc Input, 0.8 Vdc - 2.75 Vdc /30 A Outputs
Jan. 11, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Tunable Loop^TM (continued)
VOUT
SENSE
MODULE
TRIM
GND
RTUNE
CO
CTUNE
RTrim
Circuit diagram showing connection of R_TUNE 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 1000uF 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 15A to 30A step change (50% of
full load), with an input voltage of 12V.
Table 2.General recommended values of R_TUNE and C_TUNE for Vin=12V and various external ceramic capacitor
combinations.
Co
R_TUNE
C_TUNE
1x47μF
560
270pF
2x47μF
390
470pF
4x47μF 10x47μF 20x47μF
390
220
220
820pF 2200pF 4700pF
Table 3.Recommended values of R_TUNE and C_TUNE to obtain transient deviation of ≤2% of Vout for a 15A step
load with Vin=12V.
Vo
Co
R_TUNE
C_TUNE
ΔV
2.5V
3x47μF +
3x330μF
Polymer
390
3900pF
50mV
1.8V
3x47μF +
4x330μF
Polymer
330
6800pF
36mV
1.2V
7x330μF
Polymer
220
10nF
24mV
0.8V
2x47μF+
10x330μF
Polymer
150
56nF
16mV
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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