UCC14140-Q1: Does not give the expected voltage

Susmitha K

Part Number: UCC14140-Q1

Tool/software:

This IC is used to give the secondary supply voltage ( 25 V) for the High side driver (SID1182K). The recommended values in the reference design mentioned in the Datasheet of this IC does not give the expected output voltage. Kindly check the attached Screenshot of the schematic and suggest the appropriate values to get the desired output voltage at the earliest.

Thanks in advance.

2 months ago

0 Steven Mappus1 2 months ago

TI__Mastermind 24905 points

Susmitha,

You mentioned an attached schematic but I do not see a schematic attached? Are you trying to configure UCC14141 as VDD-VEE=25V, single output voltage?

Regards,

Steve

0 Susmitha K 2 months ago in reply to Steven Mappus1

Prodigy 40 points

Are you trying to configure UCC14141 as VDD-VEE=25V, single output voltage?

Yes

0 Steven Mappus1 2 months ago in reply to Susmitha K

TI__Mastermind 24905 points

Remove C8-13. These are not needed when configuring for single output. Change R5 from 50Ω to 1kΩ and connect R5 between RLIM and VDD. Make sure C15 is physically located as close as possible to the IC pins.

Regards,

Steve

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UCC14140-Q1: Does not give the expected voltage