I want to control some 20-30w led chip with mcu.They need 30-32V so i need step up for that. And thought about that cheap modules with XL6009. Is it possible to control them with PWM on EN pin?
Without having a look at the circuit, we can't help you with what component to choose. Regarding the XL6009, if you have a look at the datasheet you can see that there is an enable pin :
You can also have a look at some typical application circuits to help you design yours.