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Product details

Parameters

Features Internal GS Clock, PWM LED Driver, Thermal Shutdown Data transfer rate (Typ) (MHz) 30 Ch to ch accuracy (Typ) (+/- %) 2 Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other Signage LED display drivers

Package | Pins | Size

HTSSOP (DAP) 32 68 mm² 6.2 x 11 VQFN (RHB) 32 25 mm² 5.0 x 5.0 open-in-new Find other Signage LED display drivers

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
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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.

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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet TLC5947 24-Channel, 12-Bit PWM LED Driver With Internal Oscillator datasheet (Rev. B) Jan. 14, 2015
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 2014
Application notes 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

SIMULATION MODELS Download
SLIM264.ZIP (33 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
HTSSOP (DAP) 32 View options
VQFN (RHB) 32 View options

Ordering & quality

Support & training

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Videos

Dimming Methods: PWM Dimming

In this short on-demand training video, learn the basics of PWM dimming based on three different dimming methodologies, main FET, Series FET and Shunt FET dimmi

Posted: 03-Jan-2018
Duration: 06:43

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