I know that TI has some very robust DC-DC converter ICs.
My question is: is there any IC that can have its PWM duty cycle (NOT frequency) reliably controlled by an outside source (e.g. an Arduino) in order to achieve maximum power point tracking from a solar panel / wind turbine into a battery?
References:
http://www.timnolan.com/index.php?page=arduino-ppt-solar-charger
http://www.timnolan.com/uploads/Arduino Solar/ArduinoSolar.pdf