12V Battery Powered Fluorescent Lamp Driver Circuit

Fluorescent lamp need high voltage AC to start and keep glowing.

This 12V Battery Powered Fluorescent Lamp Driver Circuit uses 12V battery to run fluorescent lamp.

It change low voltage DC from battery to high voltage AC for the tube.

It is good for battery device and emergency light.

Circuit has oscillator, MOSFET switch and step-up transformer.

All work together to power the lamp.

Circuit Working:

Parts List:

This circuit uses 12V lead acid battery.

Main part is IC 555 which is low power timer IC.

It works as astable multivibrator and makes square wave signal.

This signal controls IRF510 MOSFET.

MOSFET switch ON/OFF is fast and powers transformer.

Transformer boost voltage and gives high voltage AC for tube.

It uses 1A 220V to 12V step-down transformer in reverse.

Connect 12V side to MOSFET and 220V side to lamp.

Capacitor C4 keeps high voltage steady and helps lamp work smooth.

Formulas with Calculations:

IC 555 Frequency:

Formula:

F = 1.44 / ((R1 + 2R2) × C2)

where,

• R1 is 1kΩ
• R2 is 2.7kΩ
• C2 is 0.01µF

Calculations:

F = 1.44 / (6400 × 10^-8)

F = 22.5 kHz

MOSFET Switching Time:

T(on) = R1 × C2 = 1000 × 10^-8 = 10µs

T(off) = (R1 + 2R2) × C2 = 6400 × 10^-8 = 64µs

Transformer Output Voltage:

Formula:

Vout = Vin × (Nsec / Npri)

where,

• Vin is 12V

Step-up ratio is 20

Calculations:

Vout = 12 × 20 = 240V AC approx

How to Build:

To build a 12V Battery Powered Fluorescent Lamp Driver Circuit following steps are required to follow the connecting the circuit:

• Collect all parts from circuit diagram.
• Pin 1 of IC1 555 go to GND.
• Pin 2 connect to pin 6.
• C2 connect between pin 2 and GND.
• Pin 3 connect to GATE of MOSFET Q1.
• Pin 4 and pin 8 go to +12V.
• R2 connect between pin 6 and pin 7.
• R1 connect from pin 7 to +12V.
• C1 positive side go to +12V and negative go to GND.
• One side of C3 go to +12V and other side go to DRAIN of Q1.
• SOURCE of MOSFET Q1 go to GND.
• Transformer primary one side go to +12V and other side go between C3 and DRAIN.
• Transformer secondary go one side to tube and other side to other end of tube through C4.

Conclusion:

This 12V Battery Powered Fluorescent Lamp Driver Circuit run fluorescent tube from 12V battery.

It is good for battery light, emergency light and saving power.

We can change R1, R2, C2 to match different tube sizes.

MOSFET make power by using better and low energy loss.

References:

Battery powered electronic ballast for fluorescent lamp with frequency control