24-ch 12-bit PWM LED driver w/7-bit dot correction 8-bit global brightness
Product details
Parameters
Package | Pins | Size
Features
- 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
- VCC = 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
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Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TLC5951 24-Channel, 12-Bit PWM LED Driver With 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control datasheet (Rev. E) | Jul. 27, 2017 |
White paper | Common LED Functions and LED Driver Design Considerations | Sep. 21, 2020 | |
Selection guide | Power Management Guide 2018 (Rev. R) | Jun. 25, 2018 | |
Technical article | Here's how body electronics and lighting technology are changing the driving experience | Sep. 26, 2016 | |
Technical article | LED brightness adjustment: high-frequency PWM dimming | Aug. 26, 2016 | |
Application note | Using the TLC5951 for Keyboard Backlighting | Apr. 14, 2015 | |
Technical article | Take better selfies with innovative LED flashes | Nov. 18, 2014 | |
Technical article | Solving the automotive EMI issues in new cars with all the screens | Sep. 11, 2014 | |
User guide | TLC5951 EVM User's Guide | Oct. 15, 2009 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HTSSOP (DAP) | 38 | View options |
VQFN (RHA) | 40 | View options |
WQFN (RTA) | 40 | View options |
Ordering & quality
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- Ongoing reliability monitoring
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Support & training
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