Other Parts Discussed in Thread: TPS92692, LM3409, TPS92515
Hi E2E,
Good day.
What is the contrast ratio of LM3404 and TPS92692? Can anyone of these parts achieve a minimum contrast ratio of 15,000, or 25,000 to 1?
Regards,
Carlo
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Carlo,
Contrast ratio is not directly controlled by either device. In both cases, it is a function of the topology, component choice, operating points and control signal resolution. In general, 15,000:1 in a switching regulator is only possible with a buck converter using a shunt FET. Please see the LM3409 and TPS92515 for examples of this dimming method.
-JP