Voltage Booster Circuit

Simple Voltage Booster Circuit designed by using LM2698 from texas instruments. IC LM2698 is a simple switcher 1.35A Boost Regulator. Suitable for 3.3 V to 5 V and 5 V to 12 V conversion. The LM2698 device is a general purpose PWM boost converter.




IC LM2698 has 1.9-A, 18 V, 0.2Ω internal switch it enables the LM2698 to provide efficient power conversion to output ranging from 2.2 V to 17 V. It can operate with input voltages as low as 2.2 V and as high as 12 V.

Circuit Diagram

Components Required

1C24.7nFC_0805_2012Metric1
2C122µFC_1210_3225Metric1
3C310µFC_1210_3225Metric1
4R13.48KΩR_0805_2012Metric1
5R230.1KΩR_0805_2012Metric1
6R324.9KΩR_0805_2012Metric1
7L110µHL_10.4×10.4_H4.81
8D10MQ040ND_SMA1
9U1LM2698SOP65P490X110-8N1
10J1, J2Screw_Terminal_01x02TerminalBlock_Altech_AK300-2_P5.00mm2

Construction & Working

To Operate as a boost converter circuit IC2698 Requires few external components only. It have adjustable frequency operation from 600 KHz to 1.2 MHz by connecting pin 7 (FSLCT) to Vin we can get operation frequency to 1.25 MHz, ground to 600 KHz, in this circuit we have choosed 600 KHz operation and hence we connected pin 7 to ground.. If you need shutdown option then connect switch to pin 3 and Ground. It is a active low pin when it feds ground supply then shutdown occurs.

The LM2698 is available in a low profile 8 – pin VSSOP package. Hence we can design booster circuit in small size.

Printed Circuit Board (PCB)

Voltage Booster Circuit PCB Gerber files.

Interactive Board Viewer

     




One thought on “Voltage Booster Circuit

  1. How do I order this. I need to boost the 24 volts from a panel to several alrm horns.
    Please advise.

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