Figure 261. Buck With Synchronous Rectification; Figure 262. 3-Phase Interleaved Buck Converter - ST STM32G4 Series Reference Manual

High-resolution timer (HRTIM)
counter
outputs
26.4.3 Multiphase converters
Multiphase techniques can be applied to multiple power conversion topologies (buck,
flyback). Their main benefits are:
•
Reduction of the current ripple on the input and output capacitors
• Reduced EMI
•
Higher efficiency at light load by dynamically changing the number of phases (phase
shedding)
The HRTIM manages multiple converters. The number of converters that can be controlled
depends on the topologies and resources used (including the ADC triggers):
•
5 buck converters with synchronous rectification (SR), using the master timer and the 5
timers
•
4 buck converters (without SR), using the master timer and 2 timers
Figure 262
912/2083

Figure 261. Buck with synchronous rectification

PER
TIMA
CMP2
CMP1
HRTIM_CHA1
TIMA
HRTIM_CHA2
presents the topology of a 3-phase interleaved buck converter.

Figure 262. 3-phase interleaved buck converter

HRTIM
_CHA1
V
HRTIM
IN
_CHB1
HRTIM
_CHC1
ADC ADC
Synchronous Rectification (SR) active
RM0440 Rev 1
RM0440
ADC
SR disabled
MS32346V2
V
OUT
MS32347V3