TPS92691-Q1: TPS92691-Q1

user3602562

Part Number: TPS92691-Q1
Other Parts Discussed in Thread: TPS92691

Hello, we are using TPS92691-Q1 chip to dim the LED. Need to reduce the LED brightness (corresponding to the LED current is 10mA), choose the analog and PWM mode dimming. How do I set it up?

over 3 years ago

0 Tuan Tran74 over 3 years ago

TI__Genius 17690 points

Hello,

Depending on the dimming mode you choose and whether it's analog or PWM dimming. Please see section 7.3.7 for analog dimming and 7.3.8 for PWM dimming.

Thanks Tuan

0 user3602562 over 3 years ago in reply to Tuan Tran74

Prodigy 130 points

hello，You mean that the dimming method is either analog dimming or PWM dimming. The two cannot be used together, right?

0 Tuan Tran74 over 3 years ago in reply to user3602562

TI__Genius 17690 points

Hello,

You can use both PWM dimming and Analog dimming methods together.

Thanks Tuan

0 user3602562 over 3 years ago in reply to Tuan Tran74

Prodigy 130 points

Hello, I designed the circuit according to the above figure. I designed fixed resistors Radj1 and Radj2 to make Iled=500mA. The output range of Iled is 20mA～1000mA through PWM dimming method, there are the following questions:
1. Is this design reasonable?
2. How to determine the minimum and maximum of Iled?
3. Can you fill out and send me the TPS92691_Boost_Design_Calculator.xls file according to my needs (see the figure below) and your suggestions?
4. Thank you very much.

0 Tuan Tran74 over 3 years ago in reply to user3602562

TI__Genius 17690 points

Hello,

I can help you answer your questions and provide information along with design equations in the data sheet for you to do your own design. We will not do the design directly for you.

If you have issue please follow the data sheet...There are equations and information in there to help you with the design. We also have an evaluation board that you can get and use to help you with the design.

https://www.ti.com/tool/TPS92692EVM-880?keyMatch=TPS92692&tisearch=Search-EN-everything&usecase=GPN

Thanks Tuan

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TPS92691-Q1: TPS92691-Q1