Q: How to set up STM32 PWM with timer for motor control and power converter applications?
Answer
Configure a timer in PWM mode. PWM frequency = timer clock / (prescaler x period). Duty cycle = pulse / (period + 1). For complementary outputs (H-bridge) enable the complementary channel and set dead-time via TIM_BDTR_MOE. On STM32H7 use HRTIM (High Resolution Timer) for sub-nanosecond PWM resolution in SMPS. For multi-phase motor control (BLDC/Stepper) use synchronized PWM channels with hardware-triggered ADC for current sensing. Center-aligned PWM modes reduce ripple compared to edge-aligned. For safety-critical applications use the break input (TIM_BKIN) to disable PWM outputs on fault detection.
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