DC to DC Boost Converter

These circuits are used to "boost" an incoming DC voltage to a higher level.
They acheive this by charging an inductor thru a "gated" power mosfet; from the incoming voltage.
At switch off: the collapsing magnetic field in the inductor
produces a potential (like back EMF) which is then rectified and filtered .
This is at a much higher voltage, which is series aiding with the input supply.
The power mosfet is gated (on/off) at 200KHz ~ 1MHz or thereabouts by an oscillator.

I have used, and can recommend the XL6009 boost-convertor circuit:


DC to DC boost Calculator

For calculator: enter freqency, voltage ranges
and current ranges as arguments:


returns: duty cycle, capacitor,
inductor and current/voltage requirements.
Frequency
Hz
 boost converter frequency
Min Vin
Volts
 lowest expected input voltage
Max Vin
Volts
 highest expected input voltage
Min Vout
Volts
 lowest desired output voltage
Max Vout
Volts
 highest desired output voltage
Iout
Amps
 Output current draw
Vripple
Volts
Maximum allowable voltage ripple

Min. Duty Cycle
%
Max. duty cycle
%
Min. Inductor size
uH
Peak inductor current
A
Minimum capacitor
uF
Minimum Schottky diode
V A

DC to DC Boost calculator adapted from: DIY DC/DC Boost Calculator by Tyler Cooper


Using YX8018 chip voltage boost circuit. Found in cheap solar garden lamps!



Link to original web page

� 1Q 2019