Introduction to Digital Power Conversion
XMC4000/1000 Family
PWM Generation
Application Guide
43
V1.0, 2015-01
4.15
Full-Bridge LLC Control Using HRC
– Synchronous Rectification
Here slices from different CAPCOM units (CCUs) interact on event control.
A CCU8 slice timer (CC80) creates Pulse-Frequency Modulation (PFM), optionally with PWM for Full-
Bridge control. CC80 is master of the synchronous rectifier (CC42/43).
Note:
The slices CC42/43 in this example can be replaced by a CCU8 slice configuration.
Figure 32
Full-Bridge LLC Control w/ Synchronous Rectification
– Using HRPWM
LLC Control by Frequency and Fine Tuning by HRPWM
The PFM and the PWM are simultaneously updated in the CC80-timer period and compare-registers.
Power transfer tuning is invoked by the High-Resolution Insertion (HRI) and Dead-Time Insertion
(DTI), between status-bits (CCST1/-2) and bridge inputs. Tuning is also possible with the CC42/43
periods.
