1 Features
1. 48 Constant-Current Sink Output Channels
. Sink Current Capability with Maximum MC, DC,
and BC Data:
. 23.9 mA (VCC ≤ 3.6 V, MC = 5)
. 31.9 mA (VCC > 3.6 V, MC = 7)
. Grayscale (GS) Control:
. 16-Bit (65,536 Steps) with Enhanced Spectrum
or Conventional PWM
. Maximum Current (MC) Control:
. 3 Bits (8 Steps) with a 3-mA to 30-mA Range
. 3 MC Sets for Each Color Group
. Dot Correction (DC) Control:
. 7 Bits (128 Steps) with a 26.2% to 100%
Range
. Global Brightness Control (BC):
. 7 Bits (128 Steps) with a 10% to 100% Range
. 3 BC Sets for Each Color Group
. LED Power-Supply Voltage: Up to 10 V
. VCC: 3.0 V to 5.5 V
. Constant-Current Accuracy:
. Channel-to-Channel: ±2% (typ), ±5% (max)
. Device-to-Device: ±2% (typ), ±4% (max)
. Data Transfer Rate: 25 MHz
. Grayscale Control Clock: 33 MHz
. Auto Display Repeat
. Display Timing Reset
. Auto Data Refresh (GS and DC Only)
. LED Open Detection (LOD)
. LED Short Detection (LSD)
. UVLO Sets Default Data
. Delay Switching to Prevent Inrush Current
. Operating Temperature: .40°C to +85°C

2 Applications
• LED Video Displays
• Variable Message Signs (VMS)
• Illumination

3 Description
The TLC5955 is a 48-channel, constant-current sink
driver. Each channel has an individually-adjustable, pulse width modulation (PWM), grayscale (GS)
brightness control with 65,536 steps and 128 steps of
constant-current dot correction (DC). DC adjusts
brightness deviation between channels. All channels
have a 128-step global brightness control (BC). BC adjusts brightness deviation between the R, G, B
color group. The eight-step maximum current control
(MC) selects the maximum output current range for
all channels of each color group. GS, DC, BC, and
MC data are accessible with a serial interface port.
The TLC5955 has two error flags: LED open
detection (LOD) and LED short detection (LSD). The
error detection results can be read with a serial
interface port.