SLIN-20E1A_10 Datasheet, PDF (20/26 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /20 A Outputs
December 10, 2010
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Tunable Loop^TM (continued)
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
240
1500pF
2x47μF
240
2700pF
4x47μF 10x47μF 20x47μF
240
150
150
5600pF 12nF 15nF
Table 3.Recommended values of R_TUNE and C_TUNE to obtain transient deviation of ≤2% of Vout for a 10A step
load with Vin=12V.
Vo
Co
R_TUNE
C_TUNE
ΔV
5V
6x47μF
220
5600pF
99mV
3.3V
5x47μF + 330μF
Polymer
220
7500pF
66mV
2.5V
2x330μF
Polymer
200
18nF
50mV
1.8V
1.2V
6x47μF + 2x 330μF 6x47μF + 4x330μF
Polymer
Polymer
150
150
33nF
120nF
36mV
24mV
0.69V
12x330μF
Polymer
150
120nF
12mV
Thermal Considerations
Power modules operate in a variety of thermal environments; however, sufficient cooling should always be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow, module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The
thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is
shown below.
Wind Tunnel
25.4_
(1.0)
PWBs
Power Module
76.2_
(3.0)
x
12.7_
(0.50)
Air
flow
Probe Location
for measuring
airflow and
ambient
temperature
Thermal Test Setup
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
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