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TPS54531 Fiches technique(PDF) 10 Page - Texas Instruments

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No de pièce TPS54531
Description  5A, 28V INPUT, STEP DOWN SWIFT??DC/DC CONVERTER WITH ECO-mode?
Download  27 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54531 Fiches technique(HTML) 10 Page - Texas Instruments

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background image
4.7 uH
L1
BOOT
1
VIN
2
EN
3
SS
4
VSNS
5
COMP
6
GND
7
PH
8
PWR PAD
9
U1
TPS54531
4.7µF
C1
4.7µF
C2
0.01µF
C3
0.1µF
C4
47µF
C8
47µF
C9
C10
open
0.55V
D1
CDBC540-G
10.2K
R5
51.1
R4
1.96k
R6
130k
R1
665k
R2
2200pF
C6
22pF
C7
C11
open
37.4k
R3
0.01µF
C5
VIN 8-28VOLTS
VOUT
VIN
VOUT 5V, 5A
TPS54531
SLVSBI5 – MAY 2013
www.ti.com
APPLICATION INFORMATION
Figure 10. Typical Application Schematic
STEP BY STEP DESIGN PROCEDURE
The following design procedure can be used to select component values for the TPS54531. Alternately, the
WEBENCH® software may be used to generate a complete design. The WEBENCH® software uses an iterative
design procedure and accesses a comprehensive database of components when generating a design. This
section presents a simplified discussion of the design process.
To begin the design process a few parameters must be decided upon. The designer needs to know the following:
Input voltage range
Output voltage
Input ripple voltage
Output ripple voltage
Output current rating
Operating frequency
For this design example, use the following as the input parameters
Table 2. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Input voltage range
8 V to 28V
Output voltage
5 V
Transient response, 2.5 A load step
ΔVout = +/- 5 %
Input ripple voltage
400 mV
Output ripple voltage
30 mV
Output current rating
5 A
Operating Frequency
570 kHz
SWITCHING FREQUENCY
The switching frequency for the TPS54531 is fixed at 570 kHz.
10
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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: TPS54531


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