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Electronics => Beginners => Topic started by: 24602 on January 18, 2025, 06:42:26 am

Title: TLC59711 LED Strip Driver
Post by: 24602 on January 18, 2025, 06:42:26 am
Hey All,

Working on driving 12-24V LED strips from a TLC59711, I have attached a schematic

Just need a double check of the work and confirm would the Gate voltage be ok at 5V?

Need a double check if my Transistor and mosfet combination is correct.

Will be driving approximately 1A of LEDs per channel

Thanks!
Title: Re: TLC59711 LED Strip Driver
Post by: ahsrabrifat on January 19, 2025, 06:06:24 pm
You can add a small gate resistor (e.g., 10Ω) in series with the MOSFET gate. It will limit the inrush current.
Title: Re: TLC59711 LED Strip Driver
Post by: Ian.M on January 19, 2025, 07:08:38 pm
What inrush current?  The gate charges to turn on the MOSFET via a fricking 10K resistor!

The PWM period is about 50us, (nom. 10MHz internal greyscale clock divided by 512, see datasheet: Figure 22. ES-PWM Operation) and I suspect the above gate drive circuit will be *far* too slow.

Edit: confirmed by simulation.  Wont work!  :horse: