TLE9263QX
High-Side Switch
9.2.5
PWM and Timer Function
Two 8-bit PWM generators are dedicated to generate a PWM signal on the HS outputs, e.g. for brightness
adjustment or compensation of supply voltage fluctuation. The PWM generators are mapped to the dedicated HS
outputs, and the duty cycle can be independently configured with a 8bit resolution via SPI (PWM1_CTRL,
PWM2_CTRL). Two different frequencies (200Hz, 400Hz) can be selected independently for every PWM
generator in the register PWM_FREQ_CTRL.
PWM Assignment and Configuration:
•
Configure duty cycle and frequency for respective PWM generator in PWM1_CTRL/PWM2_CTRL and
PWM_FREQ_CTRL
•
•
Assign PWM generator to respective HS switch(es) in HSx_CTRL
The PWM generation will start right after the HSx is assigned to the PWM generator (HS_CTRL1, HS_CTRL2)
Assignment options of HS1... HS4
•
•
•
•
Timer 1
Timer 2
PWM 1
PWM 2
Note:The min. On-time during PWM is limited by the actual Ton and Toff time of the respective HS switch, e.g.
the PWM setting ‘0000 0001’ could not be realized.
In addition, the minimum PWM setting for reliable detection of over-current and open-load measurement is
4 digits for a period of 400Hz and 2 digits for a period of 200Hz
Data Sheet
61
Rev. 1.1, 2014-09-26
INFINEON [ Infineon ]
