24-channel, 12-bit PWM LED driver with internal Oscillator
Product details
Parameters
Package | Pins | Size
Features
- 24 Channels, Constant-Current Sink Output
- 30-mA Capability (Constant-Current Sink)
- 12-Bit (4096 Steps) PWM Grayscale Control
- LED Power-Supply Voltage Up to 30 V
- VCC = 3.0 V to 5.5 V
- Constant-Current Accuracy:
- Channel-to-Channel = ±2% (Typical)
- Device-to-Device = ±2% (Typical)
- CMOS Logic Level I/O
- 30-MHz Data Transfer Rate (Standalone)
- 15-MHz Data Transfer Rate (Cascaded Devices,
SCLK Duty = 50%) - Shift Out Data Changes With Falling Edge to
Avoid Data Shift Errors - Auto Display Repeat
- 4-MHz Internal Oscillator
- Thermal Shutdown (TSD):
- Automatic Shutdown at OverTemperature Conditions
- Restart Under Normal Temperature
- Noise Reduction:
- 4-Channel Grouped Delay to Prevent Inrush Current
- Operating Temperature: –40°C to 85°C
Description
The TLC5947 is a 24-channel, constant-current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps. PWM control is repeated automatically with the programmed grayscale (GS) data. GS data are written via a serial interface port. The current value of all 24 channels is set by a single external resistor.
The TLC5947 has a thermal shutdown (TSD) function that turns off all output drivers during an over-temperature condition. All of the output drivers automatically restart when the temperature returns to normal conditions.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TLC5947 24-Channel, 12-Bit PWM LED Driver With Internal Oscillator datasheet (Rev. B) | Jan. 14, 2015 |
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 | |
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 | |
Application note | Hardware Design Considerations for a Wireless LED based Display Design | Jun. 11, 2014 |
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) | 32 | View options |
VQFN (RHB) | 32 | View options |
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