LP5860 datasheet(18/71 Pages) TI

18 / 71 page

sub-periods. As there is parasitic capacitance for the current sink, to make sure the LSD result is correct, TI

recommends to set the LED current higher than 0.5 mA.

Figure 8-9 shows the detection circuit of LSD function. When short fault is detected, 'Global_LSD bit' in

Fault_state register is set to 1 and detailed fault state for every channel is also monitored in register Dot_lsdx (x

= 0, 1, … , 2). All short fault indicator bits can be cleared by setting LSD_clear = 0Fh after the short condition is

removed.

LSD removal function can be enabled by setting 'LSD_removal' bit in Dev_config2 register to 1. This function

turns off the upside deghosting function of the scan line where short LED is included.

CS17

–

CS1

LSDVTH

CS0

Channel_lsdxx Register

Channel

Control

LSD data set to

Global_LSD Bit

–

Channel

Control

–

Channel

Control

GND

Higher than threshold for

con nuously 4 mes

Comparing with

short threshold

(VLED-1) V

LSDVTH

Figure 8-9. LSD Circuit

Thermal Shutdown

The LP5861T device implements thermal shutdown mechanism to protect the device from damage due to

overheating. When the junction temperature rises to 160 °C (typical) and above, the device switches into

shutdown mode. The LP5861T exits thermal shutdown when the junction temperature of the device drops to 145

°C (typical) and below.

UVLO (Undervoltage Lockout)

The LP5861T has an internal comparator that monitors the voltage at VCC. When VCC is below VUVF, reset is

active and the LP5861T enters INITIALIZATION state.

LP5861T

SNVSCE4 – MAY 2023

www.ti.com

Submit Document Feedback

Product Folder Links: LP5861T

LP5860 Datasheet(PDF) 18 Page - Texas Instruments

LP5860 Datasheet(HTML) 18 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

Datasheet Download

Link URL