TLC5944

ACTIVO

Controlador LED PWM de 16 canales y 12 bits con corrección de puntos de 6 bits y FET de precarga

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Hoja de datos

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

TLC5944

ACTIVO

Hoja de datos

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Detalles del producto

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.

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Documentación técnica

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Documentación principal	Tipo	Título	Fecha
*	Hoja de datos	16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET datasheet (Rev. A)	7/07/2009
	Informe	Common LED Functions and LED Driver Design Considerations	21/09/2020
	Guía de selección	Power Management Guide 2018 (Rev. R)	25/06/2018

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

GUI para el módulo de evaluación (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.

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