Power Electronic Converter For Future African Startups

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Power Electronic Converters for
Future African Startups
Odin
Program Manager,
Youth For Technology Foundation // 3D Africa
odinachi.nwankwo@youthfortechnology.org31 March
2021 //Webinar
2021

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Presentation Content
 DC to DC Converters
 Types of DC to DC Converters
Buck Converter
Boost Converter
Buck Boost Converter
 Printed Circuit Board Design of Converters
 Upcoming Webinars
 Questions & Answers
2021

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DC to DC Converters
• A DC to DC converter is an electronic circuit that
converts a source of direct current (DC) from one
voltage level to another.
• DC to DC converters are used in portable electronic
devices such as cellular phones and laptop
computers, which are supplied with power from
batteries primarily.
2021

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2021
Types of DC to DC Converters
• Buck Converter
This is a step down DC to DC voltage converter that belongs to a family
of switched mode power supply (SMPS).
A buck converter operating in a continuous conduction mode is defined
mathematically with the following equation:
D = Vo/Vi
where D=Duty cycle, Vo=output voltage, Vi=input voltage.
D=Ton/(Ton+Toff),
D=Ton/T,
T=1/f,
T=period, f=frequency of PWM.
In discontinuous conduction mode, Vo= Vi/((2L.Io/D^2.Vi.Ts) + 1)
Where L=inductance, Io=output current.

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basic buck converter circuit

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buck converter principle of operation

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• Boost Converter
This is a step up DC to DC voltage converter that belongs to a
family of switched mode power supply (SMPS).
A boost converter operating in a continuous conduction mode is
defined mathematically with the following equation:
Vo/Vi= 1/(1-D)
where D=Duty cycle, Vo=output voltage, Vi=input voltage.
D=Ton/(Ton+Toff),
D=Ton/T,
T=1/f,
T=period, f=frequency of PWM
In discontinuous mode, Vo/Vi= (1 + Vi.D^2.T)/(2L.Io),
Where L=inductance, Io=output current

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basic boost converter circuit

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boost converter principle of operation

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• Buck-Boost Converter
This is a step up and step down DC to DC voltage converter that
also belongs to a family of switched mode power supply (SMPS).
A buck-boost converter operating in a continuous conduction
mode is defined mathematically with the following equation:
Vo/Vi= (-D)/(1-D) , this in return yields D= Vo/(Vo-Vi)
where D=Duty cycle, Vo=output voltage, Vi=input voltage.
D=Ton/(Ton+Toff),
D=Ton/T,
T=1/f,
T=period, f=frequency of PWM

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2021
A buck-boost converter operating in a discontinuous
conduction mode is defined mathematically by the following
equation:
Vo/Vi= -(Vi x D^2 x T)/(2L x Io)
where D=Duty cycle,
Vo=output voltage,
Io=output current
Vi=input voltage.
D=Ton/(Ton+Toff),
D=Ton/T,
T=1/f,
T=period, f=frequency of PWM

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2021
basic buck-boost converter circuit

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buck-boost converter operating principle

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Printed Circuit Board Design
Buck Converter PCB Design (Front plane)

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Buck Converter PCB Design (3D View)

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Buck Converter PCB Design (Back plane)

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Upcoming Training
Printed Circuit Board Design for Manufacturing
What you'll learn
>Learn what is PCB and the software used in PCB design
>Drawing circuit schematics
>PCB Layout: Single & Two-layer design
>Creation of Gerber files
>Library part creation
>BOM generation
>ERC and DRC
Requirements
Circuit concepts

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Questions & Answers
2021

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Thank You
2021