LM2585S-ADJ internal Ref

BOOPATHI KANNAN

Prodigy 20 points

Hi,

I need 24V output but my input is 12V so that i chooses LM2585S, here i am getting the internal Ref is 0.6 only.

Can any one please give me the suggestion to solve this.

Thanks in advance.

over 10 years ago

0 Akshay Mehta over 10 years ago

TI__Genius 15810 points

What is the exact nature of the problem? Where are you measuring 0.6V? Please send us your schematic.

0 BOOPATHI KANNAN over 10 years ago in reply to Akshay Mehta

Prodigy 20 points

i am using LM2585S-ADJ for converting 12V to 24V to drive a solenoid which rated current is 460mA, so that i have choosed this Circuit.
But same circuit i have done in dot board but i not able to get 24V,on the pin to i am getting 0.6V voltage.There i need 1.2 for step up the output to 24V.
Can you please help me to solve in this, also circuit in the data sheet. Page NO 19 and figure 49

0 Anston Lobo over 10 years ago in reply to BOOPATHI KANNAN

TI__Genius 16025 points

Can you also take a picture of your bread board design and post it here? The recommended approach for designing a circuit is by using webench.

I've attached a design here to compare with your circuit, Let me know if this fixes it.

http://webench.ti.com/webench5/power/webench5.cgi?lang_chosen=en_US&VinMin=12&VinMax=12&O1V=24&O1I=.8&op_TA=30

Boopathi E2E.pdf

Power management

Power management forum

LM2585S-ADJ internal Ref