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LM36011: The driving current of flash is 1.5A

run Ren
Prodigy 220 points
Part Number: LM36011
Other Parts Discussed in Thread: LM36010

Hi：

I want to use TI LM36011 and LM36010. I have the following questions for consultation：

The driving current of flash is 1.5A

1.What is the maximum frame rate?

2.What is the maximum duty ratio at the maximum frame rate?

3.What about the temperature at maximum power consumption?

4.What is the current rise time of the first frame under flash current 1.5a?What is the rise time per frame after that?

5.LM36011&LM36010 Functional difference.

  • 0
    TI__Mastermind 22745 points

    Hi Run,

        What's the meaning about the "frame rate"? Its that mean the PWM dimming frequency?

        If my understanding is right, LM36010/1 can support Flash and IR mode, for flash mode, it can mainly support less than 4kHz dimming frequency and for IR mode, it can almost support about 20kHz dimming frequency.

       No special limitation about the duty cycle;

       That depends on the detail system-level application, but for the almost application, thermal is not an issue;

       There is no special rising time under flash mode, but for IR mode, it is about 32us for pass mode, and 200us for 200us, that is the setting time( from 0 to the target current). 

        LM36010 has the boost circuit and it can support boost and pass mode, but LM36011 can only support pass mode.

        Please go through the datasheet carefully.

    Regards

    Sean

        

  • 0 in reply to Sean Zhou
    Prodigy 220 points

    Hi Sean:

    The current configuration is 1.5A. In Flash mode, the Flash cycle is 15ms. What is the maximum Flash On time of 15ms?thank you.

    BR

    Run

  • 0 in reply to run Ren
    TI__Mastermind 22745 points

    Hi Run,

         That depends on the timeout regs and the ambient temp and the power loss. For most application, it can support to the maximum time set by the time out regs. But I suggest you apply an EVM and verify with your application spec.

    Sean

  • 0 in reply to Sean Zhou
    Prodigy 230 points

    Hi Ti Team:

    I use TI LM36010, I have some questions to ask, please help to solve,thank you.

    1.When the flash current is 1.5A, the Vin voltage is pulled down from 3.3v to 2.5v. What causes this?

    2.Can you help to provide the complete reference circuit of EVM of LM36010&LM36011?The EVM board circuit is not very detailed.

    thank you,Looking forward to your reply。

  • 0 in reply to user6124773
    TI__Mastermind 22745 points

    Hi Sir,

       You can use the DC power supply to do the test, I think it maybe your input source has triggered the current limit so the voltage will drop. And for the EVM files, you can dowlaod the user guide files form TI. com, there should be PDF forme of sch and bom.

    Regards

    Sean