TPL5110: Time Intervals

Yuguang Fu

Part Number: TPL5110

In the datasheet of TPL5110, "The TPL5110 can generate 1650 discrete timer intervals in the range of 100ms to 7200s. The first 9 intervals are multiples of 100ms. The remaining 1641 intervals cover the range between 1s to 7200s."

I would like to know what the exact "remaining 1641 intervals" are?

If the 1641 intervals are fixed, can I still configure any time interval, like 30mins 35s 500ms?

Thanks in advance!

over 7 years ago

0 Lane Boyd over 7 years ago

TI__Genius 16845 points

Hi,

We do not have a list of every time interval. Please follow datasheet section 8.5.3 to choose R_ext and select the time interval. For your example:
T_desired = 30mins, 35s, 500ms = 1835.5 sec
a = 0.3177 , b = -136.2571, c = 34522.4680
R_ext = 93.2 k-ohm

Because the 1650 time intervals are fixed, there may be quantization error for your desired time interval. Follow datasheet section 8.5.4 to determine the time interval selected and quantization error. For your example:
T_desired = 1835.5 sec
R_d = 932 ohm
T_adc = 1834 sec
quantization error = 0.082%

Kind regards,
Lane

0 Yuguang Fu over 7 years ago in reply to Lane Boyd

Prodigy 30 points

Thanks Lane!

By checking the datasheet, I have a following questions, what does INT function mean in the datasheet? Is it always round the number down?

0 Lane Boyd over 7 years ago in reply to Yuguang Fu

TI__Genius 16845 points

Yes, your understanding is correct

0 Yuguang Fu over 7 years ago in reply to Lane Boyd

Prodigy 30 points

Thanks Lane!

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TPL5110: Time Intervals