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LM3646 Datasheet(PDF) 6 Page - Texas Instruments |
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LM3646 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 40 page  I2C Flash I2C Stop STROBE I2C Bus ILED ILED TORCH ILED I2C Controlled Flash Start and Stop Delay Times Strobe Controlled Flash Start and Stop Delay Times External Indicator Start and Stop Delay Times Using Torch Pin ILED Flash time-out ta tb tc td te tf tg th TX event ± Start and Stop Delay Times TX EDGE TRIG STROBE LM3646 SNVS962A – DECEMBER 2013 – REVISED NOVEMBER 2014 www.ti.com 6.6 Timing Requirements DELAY EXPLANATION TIME ta Time for the LED current to start ramping up after an I2C Write command. 560 µs tb Time for the LED current to start ramping down after an I2C Stop command. 120 µs tc Time for the LED current to start ramping up after the STROBE pin is raised high. 560 µs td Time for the LED current to start ramping down after the STROBE pin is pulled low. 8 µs te Time for the LED current to start ramping up after the TORCH pin is raised high. 560 µs tf Time for the LED current to start ramping down after the TORCH pin is pulled low. 8 µs tg Time for the LED current to start ramping down after the TX pin is pulled high. 3 µs Time for the LED current to start ramping up after the TX pin is pulled low, provided the part has not timed th 2 µs out in flash mode. Figure 1. Control Logic Delays 6 Submit Documentation Feedback Copyright © 2013–2014, Texas Instruments Incorporated Product Folder Links: LM3646 |
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