LED171596ARSLR datasheet(18/153 Pages) TI1

18 / 153 page

LEDx

VLED - 1V

DRV_HEADROOM]1:0]

LED_SHORT

LED_OPEN

LED171596A

SNVSAY2 – OCTOBER 2017

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Table 2, Table 3, and Table 4 show the available sloper settings for the master and matrix sloping functions.

Advanced sloping options are intended to create visually smooth brightness transitions while the linear sloping

options are intended to soften the load transient for the VLED supply when rapid brightness changes are

required.

Table 2. Master Slope Enable

master_slope-en[0]

master sloper disabled

master sloper enabled

Table 3. Master Slope Select

master_slope-sel[1:0]

2 ms + adv slope disabled

10 ms + adv slope disabled

50 ms + adv slope enabled

200 ms + adv slope enabled

Table 4. Matrix Slope Select

matrix_slope-sel[1:0]

2 ms + adv slope disabled

10 ms + adv slope disabled

50 ms + adv slope enabled

200 ms + adv slope enabled

7.3.4 Protection and Fault Detection

The LED171596A includes fault detections for LED-open and LED-short conditions and die overtemperature.

Host can monitor the status of the faults via registers and the INT pin. Fault status and interrupt handling is

described in Interrupts section.

7.3.4.1 LED Faults

Figure 15. LED-Open, LED-Short Detect Architecture

•

Thresholds

–

LED short threshold = (VLED – 1 V) typical

–

LED open threshold = 0.25 V typical (0.25 V, VSAT + 0.25 V, VSAT + 0.5 VSAT, VSAT + 0.75 V programmable

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