TINA/Spice: DC DC converter

santosh kumar

Other Parts Discussed in Thread: TINA-TI, PMP9772, TLV61220, TPS61088

Tool/software: TINA-TI or Spice Models

Hi, I'm looking for a DC-DC converter to convert 0.7 min -1.2 max volts to a 5 Volts 2 A output. Looking for any suggestions for the requirement.

over 5 years ago

0 Manoj Toppalad over 5 years ago

TI__Prodigy 370 points

HI Santosh,

You can use webench power designer. It helps to creates customized power supply circuits based on your requirements.
Please find the link below
webench.ti.com/.../switching-regulator

Thanks,
Manoj T

0 santosh kumar over 5 years ago in reply to Manoj Toppalad

Prodigy 50 points

Hi, thanks for your reply. I was not able to find any converter for my requirement. I would probably need a dual boost converter for my requirement as the input voltage is very low and webench does not provide any design suggestion with dual boost converters. Need your suggestion here. I'm trying to convert 0.7 volts output from a fuel cell to 5v output with an output current of around 1 A.

0 Helen chen over 5 years ago in reply to santosh kumar

TI__Mastermind 40080 points

Dear Sir,

Please refer to the TI design PMP9772, this TI design could support 0.7-1.2Vin, 5V/1A output.

0 santosh kumar over 5 years ago in reply to Helen chen

Prodigy 50 points

Thanks for your reply. I tried simulating TLV61220 in webench, I'm unable to understand why 5volts supply is added to gnd pin when I try to simulate with an input of 0.7 volts expecting an output of 3 volts and 0.01A current. Is the 5 volts added just to enable the Booster ?? Is the output voltage dependent on the Source connected to GND pin?

0 santosh kumar over 5 years ago in reply to Helen chen

Prodigy 50 points

0 Helen chen over 5 years ago in reply to santosh kumar

TI__Mastermind 40080 points

Dear Sir,

Please check the attached PMP9772 sch, the output of TLV61220 connect to the Vin pin PMP9772 schematic.PDFof TPS61088, not gnd.

0 santosh kumar over 5 years ago in reply to Helen chen

Prodigy 50 points

Hi Helen Chen, thanks for your reply. Looks like there is a bug in webench online simulator. Pin naming convention are changed when I export the schematic design to TINA-TI for TLV61220DBVR.

0 Helen chen over 5 years ago in reply to santosh kumar

TI__Mastermind 40080 points

That's fine. Thanks for the update. Good luck!

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TINA/Spice: DC DC converter