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LED Driver ICs Forum Discussions

j_oehmen
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Moderator 10 replies posted 5 replies posted 10 questions asked
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Current calibration procedure:
• Power the load with a low analog dimming value (for example 10%)
• Set PWMI1,2 = LOW and disconnect the load at the same time (to avoid Vout drifts from operating conditions and bring the output current to 0)
• Quickly (to avoid Vout drifts) µC enables the calibration routine: LOOPCTRL_CH1,2.ENCAL_CH1,2 = HIGH
• Quickly (to avoid Vout drifts) µC starts the calibration: LEDCURRCAL_CH1,2.SOCAL_CH1,2 = HIGH
• Waiting time (needed to internally perform the calibration routine) → aprox. 200 µs
• TLD5501-2QV will set the FLAG: LEDCURRCAL_CH1,2.EOCAL_CH1,2 = HIGH, when calibration routine has finished
• Reconnect the load
• The output current is automatically adjusted to a low offset and more accurate analog dimming value



Read more in the datasheet section 8.2 or have a look at the TLD5501-2QV page
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