Техническая Спецификация для Texas Instruments 8-14V Vin, 1.8V Vout Synchronous Buck Converter Evaluation Module for TPS40305 TPS40305EVM-488 TPS40305EVM-488
Модели
TPS40305EVM-488
TPS40305/HPA488 Rev A
Vin = 14 V, Vout = 1.8 V, Iout = 10 A
Output Ripple
Vin = 14 V, Vout = 1.8 V, Iout = 10 A
Output Ripple
www.ti.com
TPS40305EVM-488 Assembly Drawings and Layout
6.6
Additional Waveforms
6.6.1
Output Ripple with Frequency Spread Spectrum (FSS) Enabled
Frequency Spread Spectrum varies the output switching frequency. This change in switching frequency
can produce a small change in the output voltage at the modulation frequency.
can produce a small change in the output voltage at the modulation frequency.
shows the
approximately 50mV modulation of the output voltage generated when Frequency Spread Spectrum is
enabled.
enabled.
Figure 10. TPS40305EVM-488 Output Ripple with FSS Enabled
7
TPS40305EVM-488 Assembly Drawings and Layout
The following figures (
through
) show the design of the TPS40305EVM-488 printed
circuit board. The EVM has been designed using a 4-layer, 2oz. copper-clad circuit board 2.5" × 2.5" with
all populated components on the top to allow the user to easily view, probe and evaluate the TPS40305
control IC in a practical double-sided application. Moving components to both sides of the PCB or using
additional internal layers can offer additional size reduction for space constrained systems.
all populated components on the top to allow the user to easily view, probe and evaluate the TPS40305
control IC in a practical double-sided application. Moving components to both sides of the PCB or using
additional internal layers can offer additional size reduction for space constrained systems.
13
SLUU406 – February 2010
TPS40305EVM-488
Copyright © 2010, Texas Instruments Incorporated