TLC5951

AKTIV

24-Kanal-, 12-Bit-PWM-LED-Treiber mit 7-Bit-Punktkorrektur, 8-Bit globale Helligkeit

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Datenblatt

document-pdfAcrobat TLC5951 24-Channel, 12-Bit PWM LED Driver With 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control datasheet (Rev. E) (Englisch) PDF | HTML

TLC5951

AKTIV

Jetzt bestellen

Produktdetails

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

256

Data transfer rate (typ) (MHz)

30

Ch to ch accuracy (typ) (±%)

1.5

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

256

Data transfer rate (typ) (MHz)

30

Ch to ch accuracy (typ) (±%)

1.5

Rating

Catalog

Operating temperature range (°C)

-40 to 85

HTSSOP (DAP)

38

101.25 mm² (12.5 mm × 8.1 mm)

WQFN (RTA)

40

36 mm² (6 mm × 6 mm)

VQFN (RHA)

40

36 mm² (6 mm × 6 mm)

24-Channel Constant-Current Sink Output
Current Capability: 40 mA
Selectable Grayscale (GS) Control With PWM:
12-Bit (4096 Step), 10-Bit (1024 Step), 8-Bit (256 Step)
Three Independent Grayscale Clocks for Three Color Groups
Dot Correction (DC): 7-Bit (128 Step)
Global Brightness Control (BC) for Each Color Group: 8-Bit (256 Step)
Auto Display Repeat Function
Independent Data Port for GS and BC and DC Data
Communication Path Between Each Data Port
LED Power-Supply Voltage up to 15 V
V_CC = 3 V to 5.5 V
Constant-Current Accuracy:
- Channel-to-Channel = ±1.5%
- Device-to-Device = ±3%
CMOS Logic Level I/O
Data Transfer Rate: 30 MHz
33-MHz Grayscale Control Clock
Continuous Base LED-Open Detection (LOD)
Continuous Base LED-Short Detection (LSD)
Thermal Shutdown (TSD) With Auto Restart
Grouped Delay to Prevent Inrush Current
Operating Ambient Temperature: –40°C to 85°C
Packages: HTSSOP-38, QFN-40

24-Channel Constant-Current Sink Output
Current Capability: 40 mA
Selectable Grayscale (GS) Control With PWM:
12-Bit (4096 Step), 10-Bit (1024 Step), 8-Bit (256 Step)
Three Independent Grayscale Clocks for Three Color Groups
Dot Correction (DC): 7-Bit (128 Step)
Global Brightness Control (BC) for Each Color Group: 8-Bit (256 Step)
Auto Display Repeat Function
Independent Data Port for GS and BC and DC Data
Communication Path Between Each Data Port
LED Power-Supply Voltage up to 15 V
V_CC = 3 V to 5.5 V
Constant-Current Accuracy:
- Channel-to-Channel = ±1.5%
- Device-to-Device = ±3%
CMOS Logic Level I/O
Data Transfer Rate: 30 MHz
33-MHz Grayscale Control Clock
Continuous Base LED-Open Detection (LOD)
Continuous Base LED-Short Detection (LSD)
Thermal Shutdown (TSD) With Auto Restart
Grouped Delay to Prevent Inrush Current
Operating Ambient Temperature: –40°C to 85°C
Packages: HTSSOP-38, QFN-40

The TLC5951 device is a 24-channel, constant-current sink driver. Each channel has an individually-adjustable, 4096-step, pulse-width modulation (PWM) grayscale (GS) brightness control and 128-step constant-current dot correction (DC). The dot correction adjusts brightness deviation between channels and other LED drivers. The output channels are grouped into three groups of eight channels. Each channel group has a 256-step global brightness control (BC) function and an individual grayscale clock input.

GS, DC, and BC data are accessible via a serial interface port. DC and BC can be programmed via a dedicated serial interface port.

The TLC5951 device has three error-detection circuits for LED-open detection (LOD), LED-short detection (LSD), and thermal error flag (TEF). LOD detects a broken or disconnected LED, LSD detects a shorted LED, and TEF indicates an overtemperature condition.

The TLC5951 device is a 24-channel, constant-current sink driver. Each channel has an individually-adjustable, 4096-step, pulse-width modulation (PWM) grayscale (GS) brightness control and 128-step constant-current dot correction (DC). The dot correction adjusts brightness deviation between channels and other LED drivers. The output channels are grouped into three groups of eight channels. Each channel group has a 256-step global brightness control (BC) function and an individual grayscale clock input.

GS, DC, and BC data are accessible via a serial interface port. DC and BC can be programmed via a dedicated serial interface port.

The TLC5951 device has three error-detection circuits for LED-open detection (LOD), LED-short detection (LSD), and thermal error flag (TEF). LOD detects a broken or disconnected LED, LSD detects a shorted LED, and TEF indicates an overtemperature condition.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen
*	Datenblatt	TLC5951 24-Channel, 12-Bit PWM LED Driver With 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control datasheet (Rev. E)	PDF \| HTML	27.07.2017
	Whitepaper	Common LED Functions and LED Driver Design Considerations		21.09.2020
	Auswahlhilfe	Power Management Guide 2018 (Rev. R)		25.06.2018
	Anwendungshinweis	Using the TLC5951 for Keyboard Backlighting		14.04.2015

Design und Entwicklung

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