MAXIM MAX6971 handbook
Update: 29 September, 2023
The MAX6971 is a serial-interfaced LED driver that provides 16 open-drain, constant-current-sinking LED driver outputs rated at 36V. The MAX6971 operates from a 3V to 5.5V supply. The MAX6971 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 MAX6971 operates with a 25Mb, industry-standard, 4-wire serial interface. The MAX6971 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 multi- ple MAX6971s. 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, 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 MAX6983, which automatically detects open-circuit LEDs. For safety-related applications requiring a watchdog timer, refer to the MAX6983, which includes a fail-safe feature that blanks the display if the serial interface becomes inactive for more than 1s. The MAX6971 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.
Brand: MAXIM
File format: PDF
Size: 204 KB
MD5 Checksum: 6EF97F3A4A0C3213506A05C3E33AB271
Publication date: 04 May, 2012
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PDF Link: MAXIM MAX6971 handbook PDF