Regarding led

1. Design and Implementation of LED driver for street light
applications based on economy point of view
[Considering the cost as the major problem for LED lights to be used, we decided to design our
driver circuit for low cost with considerable efficiency.]
presented by,
Aswith(19331A0235)
Vijaya Lakshmi(19331A0207)
Sri Vasantha(19331A0213)
Bhargav(20335A0201)
Bhanu Teja(19331A02A2)
Harish(20335A0202)
Under the Guidance of,
Mr. P. Gurumurthy Reddy
Assistant Professor
Department of Electrical
and Electronics

2. Contents
● Abstract
● Literature survey
● Problem statement
● Plan of Action
● References

3. Abstract
Streetlights often represent one of the highest operating expenses for municipalities because of
electricity, maintenance, and replacement costs. As such, dealing with high-power like streetlights can be
a challenge for designers as they look to simplify and lower the cost of their lighting installations. Since
the move to LED lighting is primarily driven by energy savings, the efficiency of the LED drivers is
another key concern, as is the growing need to monitor the status of the LED lighting.
The LED driver eliminates the need for step-down transformers in the voltage conversion, simplifying
the power conversion to lower voltages. In another case, a highly integrated LED driver only needs two
passive components — one resistor and one capacitor — to drive a string of LEDs.

4. Literature Survey
Details mentioned :
1. Title of Project
2. Observations

5. Title of Paper Observations
LED DRIVER
BASED ON
BOOST
CIRCUIT AND
LLC
CONVERTER[
1]
A LED driver rated power at 100W, the 70V output voltage was designed.
The proposed driver is designed for supplying an LED string composed of
two 50W white LED modulus by a 220V/50Hz line voltage.
The 50W LED module employed here is from OSRAM brand, which is
35V/1.5A, and the luminous flux is 4000LM. Then, the output current of the
LED driver is 1.5A,which is LEDs in parallel.
The output of LED driver is 70V,which is 20 LEDs in series. The static
equivalent resistance of LED lamp can be calculated with forward voltage and
flow current.

6. Title of Paper Observations
A DIRECT AC
LED DRIVER
WITH HIGH
POWER FACTOR
WITHOUT THE
USE OF PASSIVE
COMPONENTS[3]
1.MOSFET modules are utilized to control the current through the LED string.
2.As the line voltage falls, the current cannot be controlled to follow the reference
current. Due to that LEDs present a non-linear load.
3.Reduces cost of the system as passive elements are not present.
4.The absence of passive components allows for a much more reliable and compact
system. The structure is to maintain a sinusoidal waveform and high power factor
operation for the system.

7. Title of Paper Observations
A LED DRIVER
WITH
SWITCHED
CAPACITOR[2]
1.switched capacitor-based converter to drive high power light emitting
diodes (LEDs).
2To improve the switching behaviour of converter.
3.SC converters have the advantages of light weight, small size, and high
power density.
4.The increase of the switching frequency and capacitance values can enhance
the efficiency of SC converters.
5.SC converters are often applied in low power applications, while
connected in parallel at higher power levels

8. Title of Paper Observations
A SINGLE-
STAGE LED
DRIVER FOR
STREET -
LIGHTNING
APPLICATION
WITH
INTERLEAVING
PFC
CONTROL[4]
1.Reduce switching losses
2.Reduce driver cost
3.High power factor and low distortion factor
4.Used for input voltage of 110v
5. High efficiency

9. Title of Paper Observations
A SINGLE
STAGE LED
DRIVER FOR
THE STREET
LIGHTNING
SYSTEM[5]
1.Gives high power factor-0.995
2.efficiency of the system upto 80%
3.Low cost for design
4.Dimming status should have high brightness

10. Problem Statement
❖ As an important part of urban infrastructure, road planning not only requires a reasonable route
design according to the whole layout of the area, but also needs a roadway illumination to facilitate
people’s travel at night.
❖ LED street lights are important devices for road lighting projects.
❖ As we know that LED lights required a driver circuit for demand characteristics, so we need to
design the driver circuit first.
❖ According to the demand characteristics, the driver circuit design changes but whatever the driver
used for LED lights are high in cost.

11. Plan of Action
Actions:
1. Literature review
2. Design of basic driver
3. Simulation of driver
4. Implementation of hardware model
5. Result analysis

12. 2 weeks
Literature review
4 weeks
Design of basic
driver
2 weeks
Simulation of driver
4 weeks
Implementation of
hardware model
2 weeks
Result analysis

13. References
[1] Jianguang Ma, Xueye Wei, Liang Hu, Junhong Zhang, LED driver, IEEE, 2018
[2] Edilson, A LED driver with switched capacitor, IEEE, 2013
[3] Rohan Dayal, A Direct Ac LED driver with high power factor, IEEE, 2012
[4] Wei Wang,A Single stage LED Driver Based on BCM Boost Circuit,IEEE,2015
[5] Wang Yijie, LED diver for street lighting applications, Harbin Institute, 2012

14. Thank you