This document presents a design for a DC-DC boost converter for use in a solar electric system. It includes a block diagram of the system components, an explanation of how a basic boost converter works to output a voltage higher than the input voltage, and descriptions of switching devices, integrated circuits, advantages, disadvantages, and applications of boost converters. The presentation was created by three students as part of a class project on solar energy systems.

1. DC-DC BOOST CONVERTER
DESIGN FOR SOLAR
ELECTRIC SYSTEM
PRESENTED BY
V.SNEHA(10891A0203)
K.SWETHA(10891A0215)
V.SUDARSHAN(10891A0218)

2. CONTENT
BLOCK DIAGRAM
BASIC BOOST CONVERTER
SWITCHING DEVICE AND ICS
ADVANTAGES
DISADVATAGES
APPLICATIONS

3. BLOCK DIAGRAM
Dc
loads
Photo
voltilic
cell
Solar
charge
controller
battary
Dc-dc
boost
converter
inverter
Ac loads

4. BOOST CONVERTER
Output voltage always higher
than the input voltage
When the switch is ON:
Diode is reversed biased
output circuit is thus isolated
inductor is charged.
When the switch is OFF:
The output stage received energy
from the inductor as well as from
the input.
Filter capacitor is very large to
ensure constant output voltage
i
iin + vLL–
iD
Iout
L
Vin
C
iL
L
iC
+
Vout
–
D
+ vL −
Vd
C
S
iL
+
vo
−
D
+ vL Vd
S
C
+
vo
-

5. SWITCHING DEVICE
In this MOSFET is used
as switching device
It is voltage-controled
device and also it requires
small input current
Switching speed is very
high
It operates in nano sec’s

6. ICS
Used for pulse
genaration
SG3525
HEF 7041
4425 IC
High switching frequency
up to 400khz

7. PULSE GENATATION

8. ADVANTAGES
Only one switch
High effecience
Unidirectional output current
Provides one polarity output voltage
Low cost
Easy to analyze
Easy to understand
Simple circuit

9. DISADVANTAGES
Not sutable for high power conversion
Low amount of dc step up
Non isolated SMPS

10. APPLICATIONS
Commanly used as LED driver
Used for Solar power system
Used for Power factor corrections
Used in HVDC system
Applicable for LCDBACKLIGHTS &
FLASH LIGHTS
Used in HVE(Hybrid electric
vehicles)

11. ANY QUERIES

12. THANK YOU