How does a PWM duty cycle transform voltage?

[davidcowling]

I need to find out how a certain pulse width modulation duty cycle is used in SMPS power supplies (specifically a boost converter).

Also, how does the oscillation contribute to a voltage transformation? (step up)

Any pointers to some articles are welcome

 

[berkeman]

I need to find out how a certain pulse width modulation duty cycle is used in SMPS power supplies (specifically a boost converter).

Also, how does the oscillation contribute to a voltage transformation? (step up)

Any pointers to some articles are welcome

Wikipedia's article is pretty useful, and they list lots of good reference pointers at the end:

http://en.wikipedia.org/wiki/Switched-mode_power_supply

.