PWM to Analog Dimming LED Driver

Hi Praveen,

    You can check TPS61165, TPS54201 whether it can meet your requirement or not? If you can provide more information, that I can provide more professional advice.

Regards

Sean

Hi Sean

Thanks for your response.

I am trying to drive two LEDs At least I need 3 Channel, Maximum Current per channel is going to be around 100mA, Input Voltage is about 5V. 

PFA, Now We are using Diode LED Driver AL3065. Here we got the problem that we cannot able to turn off the led in the PWM analog dimming method.

Thanks and regards

Praveen

Hi Sean

Thanks for your response.

Is there any reference design or Schematic are available for the IC.

Because for validating the IC will be easier.

Thanks

Praveen   

Thanks, Sean

We are a Medical R&D based company, Will you able to provide the Development kit for evaluating (also we will sent you back)? If it works we will go for mass production.

It's possible?

Thanks.

Thanks, Sean

We will contact them.

Hi Sean,

On the website, I can get the sample only for an IC's. There is no EVM for free samples on the website. 

There is any specific person I need to contact to get the EVM? 

Thanks 

Praveen 

Hi Sean

There is any other IC that uses the Analog PWM Dimming method. I think which you suggested part number uses PWM dimming and output has a Current sink. 

And, I have doubt that Analog dimming works on the current sink and the current source method?

Thanks 

Thanks, Sean

I understand.

Hi Sean

The Driver which you have suggested works on pure PWM Dimming method,

I am Looking for an Analog PWM Dimming. Which is?

Analog PWM dimming takes the PWM input and converts it to an analog control signal (Done in Internal Circuit) . This analog control signal is used to adjust the voltage reference, which then sets the DC LED current.

Anyway, it is going to PWM input but I need a Driver that has to convert the PWM input to an analog control voltage that has to change the led current.

Will you please suggest the part number.

Thanks

Praveen

Hi Sean.

I have checked the datasheet

I think you are saying this thing.  But there is no change in circuit.

I need to share one thing that I communicated to Diodes Semi-Conductors.

They have explained the Internal block diagram of PWM to the analog dimming method of AL3065.

I am confused about this. 

They have mention different kinds of Dimming techniques and Different kind of circuit connections.

Any way the Output is current-controlled (Analog type).

I am tried PWM to analog dimming. It has internal Circuitry which converts PWM to Analog then it controls the Output current respect to that.

In LP8556, I did not see this kind of internal blocks to convert PWM to Analog.

Also, I have gone through http://www.ti.com/lit/an/snva768/snva768.pdf 

As per this document, we need a Driver to achieve Analog PWM dimming.

Thanks 

Praveen

Hi Sean,

There is any update regarding the led driver.

Thanks.