UCC14240-Q1: Minimum output voltage VDD-VEE

Téo Robert

Part Number: UCC14240-Q1
Other Parts Discussed in Thread: UCC15241-Q1, UCC14241-Q1, UCC15240-Q1

Hi,

I am looking at UCC14240-Q1 for a gate driver power supply application. I need -3/12V supply from a 24V input.

There is a contradiction in those two datasheets concerning the minimum output voltage (VDD-VEE). One states it is minimum 18V, the other says 15V.

https://www.ti.com/lit/ds/symlink/ucc14240-q1.pdf?ts=1707128514692&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FUCC14240-Q1

https://www.ti.com/lit/ds/symlink/ucc14241-q1.pdf?ts=1707136896114&ref_url=https%253A%252F%252Fwww.ti.com%252Fpower-management%252Facdc-isolated-dcdc-switching-regulators%252Fisolated-dcdc-converters-modules%252Fproducts.html (see page 3)

Can you please clarify ? Can I use the part (or UCC14241-Q1/UCC15240-Q1/UCC15241-Q1) for my -3/12V application ?

Thanks in advance.

Téo

6 months ago

0 Steven Mappus1 6 months ago

TI__Mastermind 25355 points

Téo,

My first question for my own curiosity is what kind of gate driver is requiring -3V/+12V?

The 15V vs 18V input reference is not a contradiction. The data sheet shows that operation down to VDD-VEE=15V is possible at reduced output power but to achieve the full rated power at 105°C, VDD-VEE=18V is required.

Regards,

Steve

0 Téo Robert 6 months ago in reply to Steven Mappus1

Prodigy 100 points

Hi,

Thanks for your answer and clarification.

The -3/12V voltage is for GaN devices.

Regards

Power management

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UCC14240-Q1: Minimum output voltage VDD-VEE