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LED Driver road map for high current(over1A) strobe light

Ryuji
Guru 20090 points
Other Parts Discussed in Thread: TPS92691

Hello,

Are there the roadmap of LED driver for high current(Over 1A) strobe light?
This question is related to the following post.

https://e2e.ti.com/support/power_management/led_driver/f/192/t/575189

My customer is developing strobe flash.
The input voltage range of the battery (AA battery or lithium ion battery) is about 3.6 V to 6.8 V.

The output is 1A / Ch when flashing (10 to 30 ms lit) and 400 mA / ch at torch.
Now I am introducing TPS92691, I am using the PWM terminal for 1A / ch flash operation and I am considering making analog dimming at IADJ terminal during torch.

There are 1P4S, 2P2S, 4P1S etc. LED pattern.

Our customer request the roadmap of LED Driver for above requirement?

Best Regards,
Ryuji Asaka

  • 0
    TI__Mastermind 25500 points

    Hello Ryuji,

    The TPS92691 is a good choice but it is limited to 4.5V input minimum. In our product line we do not generally do lower input voltage LED drivers so there is nothing I'm aware of on our roadmap that would fit. But I will send this to somebody in another group that has done torch/flash drivers and see if they have any further input to respond with.

    Regards,

    Clint

  • 0 in reply to Clinton Jensen
    TI__Intellectual 1940 points

    Hello,

    We do have devices that can handle the flash pulses that you mention, however we are limited on the higher end of your voltage range as our devices max out at 5.5V on average.  Is there a particular number of LEDs that need to be driven as well as a specific control interface (GPIO or I2C)?

    Greg

  • 0 in reply to Greg Lubarsky
    Guru 20090 points
    Hello Greg,

    Thank you for the reply.
    Maybe, the LEDs are 2S. Thus, the output voltage is about 7.2V.
    Also there is no specific control interface requirement but the analog dimming is necessary.

    Best Regards,
    Ryuji