MAX6969 16-Port, 5.5V Constant-Current LED Driver

Description

FULL DATA SHEET (PDF, 240kB) Download   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¡ãC to +125¡ãC temperature range.

An evaluation kit is available:  MAX6969EVKIT 

NOTE: This product requires use of the following:

MAX6969 EVKIT Software

Key Features		Applications/Uses
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¡ãC to +125¡ãC Temperature Range Underwriters Laboratories (UL®) Recognized		Architectural Lighting Gaming Features Marquee Displays Point-of-Order Signs Traffic Signs Variable Message Signs

 

This product is from a family of 12 shift-register latch-type LED drivers with 8-port and 16-port, 5.5V and 36V rated outputs, with and without LED fault detection and watch dog timer. *Future product¡ªcontact factory for availability.

Diagram

Typical Operating Circuit

source£ºShenZhen henlito electronic co.,ltd.

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