Looking for a DC/DC converter suggestion

Jay128

Hi all,

I am using a MSP430 with 2 AAA battries. MSP is in deep sleep mode for approx. 1 sec then wakes-up upon hal sensor interrupt, then MSP trigger a coil using BSS138N MOSFET. While sleeping MSP consumes 1uA and .5mA when woked up. Current cosumption when coil is triggered: 3mA for 200ms

Now, I realize that I need more volts for this coil than 3 volts. MOSFET is connected to external power supply of 9V to 12 Volts and works great.

I am looking for a DC/DC converter suggestions. Below is my wish list:

Extremely low BOM, preferably includes some sort of switch so I don't have to use BSS138N, extremly low current consumption when sleeping, module for factor also acceptable as long as it is not BGA.

Thank you very much,

Jay

over 4 years ago

0 LeonardEllis over 4 years ago

TI__Guru 71526 points

Hello Jay,

For your power supply design, I recommend you start with WEBENCH: https://webench.ti.com/power-designer/switching-regulator . You can define the VIN range, specify VOUT as well as IOUT. From the designs WEBENCH generates, you can then sort/filter the designs by any of the parameters, in this case perhaps by BOM count. You can then compare other factors and select the design that is best suited for the application. WEBENCH provides you a way to easily compare designs to find what the best solution for your product will be.

Please let us know which design you have selected, and if you have any other questions.

Regards,

~Leonard

0 Jay128 over 4 years ago in reply to LeonardEllis

Prodigy 230 points

ok thank you, I will try that.

Power management

Power management forum

Looking for a DC/DC converter suggestion