Texas Instruments 8-A DC/DC Converter with Simultaneous Sequencing of Multiple Voltages TPS54880EVM TPS54880EVM Datenbogen
Produktcode
TPS54880EVM
A-3
Out of Phase Synchronization of I/O and Core SWIFT
E
Family Regulators
Figure A-3. Input Voltage Ripple (Ch.2)and Switching Waveforms of Synchronized Out of
Phase Core Regulator (Ch.4) and I/O Regulator (Ch.1)
Figure A-4. Input Voltage Ripple (Ch.2 and Switching Waveforms of Nonsynchronized
Core Regulator (Ch.4) and I/O Regulator (Ch.1)
It can be seen that the input voltage ripple of synchronized regulators is 100
mV peak-to-peak, while the input voltage ripple of nonsynchronized regulators
is 150 mV peak-to-peak. The ripple cancellation effect is the most significant
when both regulators have roughly the same output current and the duty
cycles complement each other.
mV peak-to-peak, while the input voltage ripple of nonsynchronized regulators
is 150 mV peak-to-peak. The ripple cancellation effect is the most significant
when both regulators have roughly the same output current and the duty
cycles complement each other.