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TPS54531 Fiches technique(PDF) 10 Page - Texas Instruments |
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TPS54531 Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 27 page 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 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: TPS54531 |
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