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LT3743 Production
The LT3743 is a fixed frequency synchronous step-down DC/DC controller designed to drive high current LEDs. The average current mode controller will maintain...
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LT3743 on Analog.com

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LT3743 PWM and CTRL_SEL Pin Threshold Specifications

mmori on Dec 3, 2025

Category: Datasheet/Specs

Product Number: LT3743

I’m designing a circuit using the LT3743.
The datasheet does not provide the minimum and maximum threshold values for the PWM and CTRL_SEL pins.
Could you please provide this information?

Satoru

on Dec 18, 2025 3:09 AM
0
Hello,

Unfortunately, there is no direct measurement for PWM and CTRL_SEL min/max threshold during the product run.
Therefore, we are sorry but your requested min/max threshold values are not available.
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mmori on Dec 22, 2025 11:41 PM
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Hello,
Thank you for your answer. I understand that there is no specific threshold.
I would like to ask the question in a slightly different way.
We have designed VOH to be 2.9 V or higher and VOL to be 0.4 V or lower.
Are these conditions sufficient to drive the CTRL_SEL pin and the PWM pin?
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Satoru

on Jan 5, 2026 12:32 AM
0
Hello,

Thank you again for asking.
We expect threshold range stays within 0.75V-1.5V so that would meet your condition, but we cannot confirm it, as the max/min threshold test was disabled during the production run.

Regards,
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mmori on Jan 6, 2026 2:40 AM
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Hello,

Thank you for your reply. Your explanation was very helpful, and I will take it into consideration.
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LT3743 PWM and CTRL_SEL Pin Threshold Specifications

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