Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Vin 18V-32V Vout 24V-what can I use?

Winsu

Full Member level 2
Joined
Oct 25, 2017
Messages
135
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
1,283
Hi All,

I need to get a steady voltage of 24V but the Vin can change between 18V and 32V- What could I use?
 

HULK_28

Newbie level 5
Joined
May 26, 2020
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Location
SACLAY
Activity points
63
Hello Winsu,

You can use the excellent LTC3777 by Analog Devices, very high efficiency, perfect for buck-boost design like yours.
Regards.
 

stenzer

Full Member level 4
Joined
Oct 1, 2012
Messages
204
Helped
23
Reputation
46
Reaction score
22
Trophy points
1,298
Activity points
3,107

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
17,302
Helped
3,916
Reputation
7,830
Reaction score
3,779
Trophy points
113
Activity points
114,847
Hi,

Every switch mode IC manufacturer provides selection guides to find the correct IC for your application.
Be sure the ICs does the job as desired...and as specified in the datasheet.

You may also use ready to buy DCDC converters, just choose one with the desired input voltage range (and output voltage, for sure).

Klaus
 

Easy peasy

Advanced Member level 5
Joined
Aug 15, 2015
Messages
2,427
Helped
893
Reputation
1,786
Reaction score
881
Trophy points
113
Location
Melbourne
Activity points
13,767
Sepic converter stage run by any boost chip with internal xtor / fet ...
 

Winsu

Full Member level 2
Joined
Oct 25, 2017
Messages
135
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
1,283
Thanks to everyone!

- - - Updated - - -

There is nothing bit simpler?
 

stenzer

Full Member level 4
Joined
Oct 1, 2012
Messages
204
Helped
23
Reputation
46
Reaction score
22
Trophy points
1,298
Activity points
3,107
Use a single boost converter in combination with a LDO, but depending on your desired output current you will likely dissipate/waste power.

What's your output current?

greets
 

Winsu

Full Member level 2
Joined
Oct 25, 2017
Messages
135
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
1,283
It will be 50mA

How could I combine then?.
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
17,302
Helped
3,916
Reputation
7,830
Reaction score
3,779
Trophy points
113
Activity points
114,847
Hi,

There is nothing bit simpler?
No. Nothing simpler than a ready to buy 1-part solution. Like TRACO TEC 2-2415.

Klaus
 
  • Like
Reactions: Winsu

    Winsu

    points: 2
    Helpful Answer Positive Rating

stenzer

Full Member level 4
Joined
Oct 1, 2012
Messages
204
Helped
23
Reputation
46
Reaction score
22
Trophy points
1,298
Activity points
3,107
You may use TI's webench [1] to design your boost converter. Put an appropriate LDO at its output.

But note, your LDO will waste approximately 0.45 W. Considering the efficiency of your boost converter you will dissipate about 0.6 W.

I would use a single IC solution, as already recommended. Klaus also suggested a specific IC, which requires almost no additional design effort.

[1] https://webench.ti.com/power-designer/switching-regulator

greets
 
  • Like
Reactions: Winsu

    Winsu

    points: 2
    Helpful Answer Positive Rating
Toggle Sidebar

Part and Inventory Search


Welcome to EDABoard.com

Sponsor

Sponsor

Design Fast


×
Top