MAX6983 Maxim Integrated Products, MAX6983 Datasheet - Page 6

• Manufacturer Part Number: MAX6983
• Description: 36V Constant-Current LED Driver
• Manufacturer: Maxim Integrated Products

16-Port, 36V Constant-Current LED Driver with
LED Fault Detection and Watchdog
Figure 1. Block Diagram
6
5–20
PIN
_______________________________________________________________________________________
21
22
23
24
1
2
3
4
OUT0–OUT15 LED Driver Outputs. OUT0 to OUT15 are open-drain, constant-current sinking outputs rated to 28V.
NAME
DOUT
GND
CLK
DIN
SET
OE
LE
V+
CLK
DIN
OE
LE
Ground
Serial-Data Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
Serial-Clock Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
Load-Enable Input. Data is loaded transparently from the internal shift register(s) to the output latch(es)
while LE is high. Data is latched into the output latch(es) on LE's falling edge, and retained while LE is
low.
Output Enable Input. High forces outputs OUT0 to OUT15 high impedance, without altering the contents
of the output latches. Low enables outputs OUT0 to OUT15 to follow the state of the output latches.
Serial-Data Output. Data is clocked out of the 16-bit internal shift-register to DOUT on CLK’s rising edge.
LED Current Setting. Connect SET to GND through a resistor (RSET) to set the maximum LED current.
Positive Supply Voltage. Bypass V+ to GND with a 0.1µF ceramic capacitor.
OUT0
D0
D0
D0
OUT1
SERIAL-TO-PARALLEL SHIFT REGISTER
CONSTANT-CURRENT SINKS
OUT2
FAULT DETECTION
LATCHES
OUT13
OUT14
OUT15
D15
D15
D15
FUNCTION
GND
POWER-ON
REFERENCE
WATCH-
CURRENT
RESET
MAX6983
DOG
V+
GND
DOUT
V+
R
SET
Pin Description
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