TLC5958 Datasheet, PDF (14/28 Pages) Texas Instruments – TLC5958 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED Open Detection and Display Data Memory Support 32-Multiplexing

TLC5958
SLVSCE7A – MAY 2014 – REVISED SEPTEMBER 2014
10 Detailed Description
www.ti.com
10.1 Overview
The TLC5958 is a 48 channels constant-current sink driver for multiplexing system with 1 to 32 duty ratio. Each
channel has an individually-adjustable, 65536-step, pulse width modulation (PWM) grayscale (GS).
48K bit display memory is implemented to increase the visual refresh rate and to decrease the GS data writing
frequency.
The TLC5958 support output current range from 1mA to 25mA, channel-to-channel accuracy is 3% max, device-
to-device accuracy is 2% max in all current range. Besides, it implement Low Gray Scale Enhancement
(LGSE™) technology to improve the display quality at low grayscale condition. These features make TLC5958
more suitable for high-density multiplexing application.
The output channels are grouped into three groups, each group has 16 channels. Each group has a 512-step
color brightness control (CC) function. The maximum current value of all 48 channels can be set by 8-step global
brightness control (BC) function. CC and BC can be used to adjust the brightness deviation between LED
drivers. GS, CC, and BC data are accessible via a serial interface port.
The TLC5958 has one error flag: LED open detection (LOD), which can be read via a serial interface port.
Besides, The TLC5958 also have Thermal shut down(TSD) and Iref resistor short protection(ISP), which make
sure a higher system reliability. The TLC5958 also has a power-save mode that sets the total current
consumption to 0.8mA (typ) when all outputs are off.
14
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated