TPS92612: Powering many 0.5W white LEDs

Hi Nir,

Please share more details for a better recommendation. What's your application?  and what's your operating condition, like Vin range, Vf range of the LEDs, current requirement, channel number... Does a MCU involved in this system? Many thanks!

Hey here are some more details:

1. This is for an LED based lamp.

2. As for Vin, i am flexible since this is only at the beginning of the design phase.

3. Same for the VF range, but assume between 2.8V and 3V

4. Each LED will consume around 65mA @ 3V and I wish to have about 10 LEDS.

5. Yes, there will be an MCU controlling the system, including a 16bit PWM signal.

Thank you,

Nir

Hi Nir,

Do you want to have automotive products or non-Auto version? If it's related to automotive version, there are some options.

• if you have a high dimming ratio requirement, and want to achieve a flexible animation, TPS929120-Q1 could be an option. It supports 12 channels and UART over Can interface. 
• Or you can consider TPS92621/2/3/4-Q1 family, it supports 1~4 channels solution, you can select 2 or 3 or 4 channels according to your LED architecture.

If you want to have a non-Auto device, please let me know your end equipment. Many thanks!

This is a non-Auto device. This is for a wall lamp. All the LED will use a single PWM signal to fade in/out. What would

be the best system architecture here?

Hi Nir,

Thanks for the sharing, if you want a non-Auto version, tps92612-q1 could meet your requirement, please keep in mind it's a linear part, that means your input voltage must be higher than output voltage plus dropout voltage. would you consider a DC/DC solution? Thanks!