TLE75080-EMH Datasheet, PDF (43/80 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

TLE75080-EMH
Power Stages
For each PWM generator 4 parameters can be set:
• duty cycle (bits PWM_CR0.DC for PWM Generator 0)
– 8 bits are available to achieve 0.39% duty cycle resolution
– when the micro-controller programs a new duty cycle, the PWM generator waits until the previous cycle is
completed before using the new duty cycle (this happens also when the duty cycle is either 0% or 100% -
the new duty cycle is taken with the next PWM cycle)
– the maximum duty cycle achievable is 99.61% (PWM_CR0.DC set to “11111111_B”). It is possible to achieve
100% by setting PWM_CR0.FREQ to “11_B”
• frequency (bits PWM_CR0.FREQ for PWM Generator 0)
– with 2 bits is possible to select the divider for f_INT to achieve the needed duty cycle
– 00_B = f_INT / 1024 (when f_INT = 102.4 kHz the corresponding PWM frequency is 100 Hz)
– 01_B = f_INT / 512 (corresponding to 200 Hz)
– 10_B = f_INT / 256 (corresponding to 400 Hz)
• channel output control and mapping registers PWM_OUT and PWM_MAP)
– any channel can be mapped to each PWM Generator
– together with 2 parallel input it is possible to have 4 independent PWM groups of channels with low effort
from the point of view of micro-controller resources and SPI data traffic
Figure 18 expands the concept shown in Figure 9 adding the PWM Generators.
Data Sheet
43
Rev. 1.0, 2016-06-22