LM3406: 2-Wire PWM Dimming Frequency

DDLL7893

Part Number: LM3406
Other Parts Discussed in Thread: TPS922052,

Tool/software:

Hi Team,

The Datasheet didn't mention any ratings for PWM Frequency of the Input 2-Wire PWM.
May I know the minimum and maximum frequency?

11 months ago

0 Steven Li 11 months ago

TI__Mastermind 23190 points

Hi Customer,

Please refer to Section 8.10 FAST LOGIC PIN FOR PWM DIMMING from the datasheet.

LM3406 is an old device. We recommend you switch to the newer generation, which is TPS922052/3/4/5.

Best Regards,

Steven

0 DDLL7893 11 months ago in reply to Steven Li

Prodigy 10 points

Thansk Steven for the reply, we strictly have to use 2-Wire PWM Dimming. Can TPS922052 do 2-Wire? Thanks

0 Jared Zhou 11 months ago in reply to DDLL7893

TI__Mastermind 20515 points

Hi Custoemr,

Our expert is OoO and he will reply to you once he is back to office, thanks for your patience.

BR, Jared

0 Steven Li 11 months ago in reply to DDLL7893

TI__Mastermind 23190 points

Hi Customer,

Sorry for the late response. Thanks for your understanding.

What is the 2-Wire PWM dimming that you mentioned?

Maybe you can take a look at the PWM dimming mode of TPS922052 and check if this is what you want. You can refer to Section 8.3.5.1 PWM Dimming from the datasheet.

Best Regards,

Steven

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LM3406: 2-Wire PWM Dimming Frequency