TLC5944

ACTIVE

16-channel, 12-bit PWM LED driver with 6-bit dot correction and pre-charge FET

Order now

Data sheet

document-pdfAcrobat 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET datasheet (Rev. A)

TLC5944

ACTIVE

Data sheet

Order now

Product details

Features

Dot Correction, Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power good, Thermal shutdown

Analog dimming steps

64

Data transfer rate (typ) (MHz)

30

Ch to ch accuracy (typ) (±%)

1

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Features

Dot Correction, Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power good, Thermal shutdown

Analog dimming steps

64

Data transfer rate (typ) (MHz)

30

Ch to ch accuracy (typ) (±%)

1

Rating

Catalog

Operating temperature range (°C)

-40 to 85

HTSSOP (PWP)

28

62.08 mm² (9.7 mm × 6.4 mm)

VQFN (RHB)

32

25 mm² (5 mm × 5 mm)

16 Channels, Constant Current Sink Output
60-mA Capability (Constant Current Sink)
12-Bit (4096 Steps) Grayscale Control with PWM
6-Bit (64 Steps) Dot Correction with Sink Current
Internal Pre-Charge FET to Prevent LED Ghosting Phenomenon on Multiplexed LED Systems
LED Power-Supply Voltage up to 15 V
V_CC = 3.0 V to 5.5 V
Constant Current Accuracy:
- Channel-to-Channel = ±1%
- Device-to-Device = ±3%
CMOS Logic Level I/O
30-MHz Data Transfer Rate
33-MHz Grayscale Control Clock
Continuous Base LED Open Detection (LOD):
- Detect LED opening and LED short to GND during display with auto output off function
Thermal Shutdown (TSD):
- Automatic shutdown at over-temperature conditions
- Restart under normal temperature
Pre-Thermal Warning (PTW):
- High temperature operation alert
Readable Error Information:
- LED Open Detection (LOD)
- Thermal Error Flag (TEF)
- Pre-Thermal Warning (PTW)
Noise Reduction:
- 4-channel grouped delay to prevent inrush current
Operating Temperature: -40°C to +85°C
APPLICATIONS
- Monochrome, Multicolor, Full-Color LED Displays Using Multiplexing System
- LED Signboards Using Multiplexing System

All trademarks are the property of their respective owners.

16 Channels, Constant Current Sink Output
60-mA Capability (Constant Current Sink)
12-Bit (4096 Steps) Grayscale Control with PWM
6-Bit (64 Steps) Dot Correction with Sink Current
Internal Pre-Charge FET to Prevent LED Ghosting Phenomenon on Multiplexed LED Systems
LED Power-Supply Voltage up to 15 V
V_CC = 3.0 V to 5.5 V
Constant Current Accuracy:
- Channel-to-Channel = ±1%
- Device-to-Device = ±3%
CMOS Logic Level I/O
30-MHz Data Transfer Rate
33-MHz Grayscale Control Clock
Continuous Base LED Open Detection (LOD):
- Detect LED opening and LED short to GND during display with auto output off function
Thermal Shutdown (TSD):
- Automatic shutdown at over-temperature conditions
- Restart under normal temperature
Pre-Thermal Warning (PTW):
- High temperature operation alert
Readable Error Information:
- LED Open Detection (LOD)
- Thermal Error Flag (TEF)
- Pre-Thermal Warning (PTW)
Noise Reduction:
- 4-channel grouped delay to prevent inrush current
Operating Temperature: -40°C to +85°C
APPLICATIONS
- Monochrome, Multicolor, Full-Color LED Displays Using Multiplexing System
- LED Signboards Using Multiplexing System

All trademarks are the property of their respective owners.

The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC) adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the TEF is set, all output drivers are turned off by the thermal shutdown (TSD) protection. Additionally, when the TEF is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature condition. The output drivers remain on when PTW is set.

The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC) adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.

The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period. The TEF indicates a too-high temperature condition; when the TEF is set, all output drivers are turned off by the thermal shutdown (TSD) protection. Additionally, when the TEF is cleared, all output drivers are restarted. The PTW indicates that the IC is operating in a high temperature condition. The output drivers remain on when PTW is set.

filter

Find other LED display drivers

Download View video with transcript Video

Technical documentation

No results found. Please clear your search and try again.

View all 3

Top documentation	Type	Title	Date
*	Data sheet	16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET datasheet (Rev. A)	Jul 7, 2009
	White paper	Common LED Functions and LED Driver Design Considerations	Sep 21, 2020
	Selection guide	Power Management Guide 2018 (Rev. R)	Jun 25, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

GUI for evaluation module (EVM)

TLC594XEVM-SW — TLC594xEVM Software Version 2.0.1.5

The TLC594x Graphical User Interface (GUI) allows users to change colors and interact with the TLC594x board. The program can be used with or without the board attached.

Supported products & hardware

Download options

Simulation model