TPS61165: EasyScale: One-Wire Digital Dimming

Hi,

Can you provide more application requirement so we can check if there any new product better for your design 

Hi Andy,

I want to ensure that the output current will not include a ripple caused by dimming.

Analog dimming can achieve the requirement.  

Hi,

Can you use higher PWM freq like 20KHz---100KHz for dimming control? set the RC low pass filter corner freq below 1KHz for much lower ripple

Hi Andy,

What is the corner frequency value of the RC filter used in the TPS61165?

Can you confirm the FB fluctuation when using one-wire digital dimming?

Hi

What's Vin, Vout and LED current in your application? we may have new products with PWM dimming pin to simplify the design 

Hi Andy,

Vin=5V

Support 38V VOUT

Support 1.5A Switch FET

Hi,

Let me check and update you early next week,

Andy Chen said:

early next week,

Hi Andy, do you have an update on this? Thanks

Hi,

Sorry for late!

Pls check if TPS92360 meet your requirement.

It has CTRL pin for PWM dimming control to remove your concern on FB pin ripple

Hi Andy,

Do you have a lower thermal resistance part that has a thermal pad?

Thanks.

Hi

What's the output voltage and current to drive LED bank in your application?

Hi Andy,

The output voltage is about 20V

The output current is about 300mA

Future applications may demand higher power consumption.

Hi Hector,

Let me check out more suitable part....

Hi Hector,

Pls check if TPS923650 OK for you... 

Hi Andy,

TPS923650 may add additional cost for analog dimming...

Thanks