Solar Mobile Charger @Enelek Power Pvt. Ltd.

• Solar Mobile Chargers use Solar Panels to charge Mobile batteries.

• Portable, Handy & Ready to use.

SOLAR MOBILE CHARGER

Advantages

• Effective

•Versatile

•Uninterrupted power supply

• Save Electric power

• Compact

Disadvantages

• Expensive!

• Time frame!!

Pros and Cons

Flow Chart

Features

o Efficient charging as per area of solar panel

o Faster rate of Battery Charging

o Should Charge in Low Light as well

o Low Heat dissipation

o Applicable to Various Mobile Battery types

o Lesser Components thereby Reducing Cost

o Indications for proper input & output

o Compact & Attractive

o Light Weight

A solar panel of desired rating

• 6 Volt , 300 mA solar cells are very common & easily available.

A Voltage converter

• Works on DC voltage.

• Regulates the input.

• Provide fixed Voltage to the battery.

Essentials for Development

Essentials for Development cntd..

Reverse Battery Drainage Protection

• Stops battery from draining when input is less than battery voltage

A Device for Protection from Variations in Input Voltage (Ripple)

• Stabilize Input Voltage

• Protect from High Intensity Pulses

Essentials for Development cntd..

Indication for valid input & output

• Can be any indicating mechanism

• Also for indicating valid output

Compact assembly

• Convenient usability

• Sturdy product casing

• Convenient for travelling

Options for Mobile Charger

o Voltage Regulation can be achieved using Fixed Voltage regulators like LM 7805 series.

o Adjustable Voltage Regulators like LM317, LM338 and more provide precise output level.

Disadvantages of Above Methods

o Both of the mentioned techniques have low conversion efficiency.

o Lot of energy is wasted as heat.

o Heat sink is compulsory.

o Bulky charger design

Switching Voltage Regulator

o DC to DC conversion is achievable from 3 volts to 40 volts.

o IC MC 34063 series varies its output in accordance to desired voltage level.

o High conversion efficiency up to 60%.

o Extra input power is utilized as output current.

o Negligible heat dissipation avoiding heat sink.

o Compact charger design is achievable.

Features of MC 34063A

o Wide operating range.

o Higher efficiency than other regulators.

o Heat sink not required reducing further losses.

o Low stand by current.

o Can perform step-down, step-up & voltage inversion .

o Current limiting available.

o Flexible and compact designing achievable .

Internal Configuration MC 34063A

Circuit Diagram

Step down Mode of MC 34063A

• Transistor Q1 interrupts input voltage & provided as

variable duty cycle square wave to the LC filter.

• The filter averages the square wave producing a dc

voltage.

• Percentage conduction ON time is controlled to get

desired voltage level.

Circuit Diagram with Input Output LED

A Review of Components Solar panel

Power source to charge the mobile. 6 volt 300 mA rating.

Capacitor

Provide a Regulated Voltage and

current from panel and to the battery.

LED’s :

To indicate the connections are proper from panel and to see whether the required voltage is being supplied to the battery.

Diodes :

To stop Reverse Battery Draining

A Review of Components contd..

Resistance :

To limit the current flowing into the LED

Relimate wires and connectors :

For connections of elements on PCB board. Here we are using it to provide input from the Solar panel.

A Review of Components contd..

Switch :

To switch ON/OFF the mobile charger

PCB :

To mount the solar charger circuit

Soldering iron and wire :

For soldering of elements on PCB.

A Review of Components contd..

THANK YOU!