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What is the maximum dimming ratio achievable with TLD5099EP?

What is the maximum dimming ratio achievable with TLD5099EP?

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Community Translation: TLD5099EPで達成可能な最大調光比はどれぐらいですか?

The dimming ratio (also referred to as the contrast ratio) is the ratio between the PWM period and the minimum duty time manageable by the DC-DC.
In order to perform dimming without color shift, digital dimming has to be used. The minimum PWM frequency to avoid flickering is 50Hz (= 20ms period). The minimum duty time for TLD5099EP is tPWMI,H = 6µs. Then the contrast ratio is 20*10^-3/(6*10^-6):1  3333:1
Cf. the section Enable and dimming function in the datasheet of TLD5099EP.

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