Maximum PWM frequency of MAX22208

Hi,

the MAX22208 is not specified with a certain limit. Its limiting factors are the OCP blanking time of 2.2...3.5µs and the slew rate of 300V/ns. The slew rate is limited in order to keep electromagnetic emission low.

This indicates that PWM should be <100kHz, more realistic 20-50kHz, depending on current and supply range:

Each slope leads to a certain power dissipation, proportional to coil current * 1/2 supply voltage / slew rate * frequency. 

Wit this, a 24V application could use a higher frequency (e.g. 50kHz), while a 48V application would lead to same power dissipation at 25kHz. 

Hi,

the MAX22208 is not specified with a certain limit. Its limiting factors are the OCP blanking time of 2.2...3.5µs and the slew rate of 300V/ns. The slew rate is limited in order to keep electromagnetic emission low.

This indicates that PWM should be <100kHz, more realistic 20-50kHz, depending on current and supply range:

Each slope leads to a certain power dissipation, proportional to coil current * 1/2 supply voltage / slew rate * frequency. 

Wit this, a 24V application could use a higher frequency (e.g. 50kHz), while a 48V application would lead to same power dissipation at 25kHz.