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16-Port, 5.5V Constant-Current LED Driver

Product Details

Key Features

Parametric specs for Display Drivers
LCD or LED LED
Display Type Common Anode
Interface Serial 4-Wire 25Mbit
Digits or Char. 16-Segment
Output Format Any digit type
Segment Blinking No
VSUPPLY (V) (min) 3
VSUPPLY (V) (max) 5.5
Package/Pins PDIP/24
SOIC (W)/24
TSSOP/24
Budgetary
Price (See Notes)
2.52
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Simplified Block Diagram

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Parameters

Parametric specs for Display Drivers
LCD or LED LED
Display Type Common Anode
Interface Serial 4-Wire 25Mbit
Digits or Char. 16-Segment
Output Format Any digit type
Segment Blinking No
VSUPPLY (V) (min) 3
VSUPPLY (V) (max) 5.5
Package/Pins PDIP/24
SOIC (W)/24
TSSOP/24
Budgetary
Price (See Notes)
2.52

Key Features

  • 25Mb, Industry-Standard, 4-Wire Serial Interface at 5V
  • 3V to 5.5V Logic Supply
  • 16 Constant-Current LED Outputs Rated at 5.5V
  • Up to 55mA Continuous Current per Output
  • Output Current Programmed by Single Resistor
  • 3% Current Matching Between Outputs
  • 6% Current Matching Between ICs
  • High-Dissipation, 24-Pin Packages
  • -40°C to +125°C Temperature Range

Applications/Uses

  • Architectural Lighting
  • Gaming Features
  • Marquee Displays
  • Point-of-Order Signs
  • Traffic Signs
  • Variable Message Signs

Description

The MAX6969 serial-interfaced LED driver provides 16 open-drain, constant-current-sinking LED driver outputs rated at 5.5V. The MAX6969 operates from a 3V to 5.5V supply. The MAX6969 supply and the LEDs' supply or supplies can power up in any order. The constant-current outputs are programmed together to up to 55mA using a single external resistor. The MAX6969 operates with a 25Mb, industry-standard, 4-wire serial interface.

The MAX6969 uses the industry-standard, shift-register-plus-latch-type serial interface. The driver accepts data shifted into a 16-bit shift register using data input DIN and clock input CLK. Input data appears at the DOUT output 16 clock cycles later to allow cascading of multiple MAX6969s. The latch-enable input, LE, loads the 16 bits of shift register data into a 16-bit output latch to set which LEDs are on and which are off. The output-enable, active-low OE, gates all 16 outputs on and off, and is fast enough to be used as a PWM input for LED intensity control.

For applications requiring LED fault detection, refer to the MAX6984*, which automatically detects open-circuit LEDs.

For safety-related applications requiring a watchdog timer, refer to the MAX6979, which includes a fail-safe feature that blanks the display if the serial interface becomes inactive for more than 1s.

The MAX6969 is one of a family of 12 shift-register-plus-latch-type LED drivers. The family includes 8-port and 16-port types, with 5.5V- or 36V-rated LED outputs, with and without open-circuit LED detection and watchdog. All versions operate from a 3V to 5.5V supply, and are specified over the -40°C to +125°C temperature range.

Simplified Block Diagram

MAX6969: Typical Operating Circuit MAX6969: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.