MAX6971(2005) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX6971 Datasheet PDF : 12 Pages
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16-Port, 36V Constant-Current LED Driver
PIN
1
2
3
4
5–20
21
22
23
24
Pin Description
NAME
FUNCTION
GND
Ground
DIN
Serial-Data Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
CLK
Serial-Clock Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
LE
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.
OUT0–OUT15 LED Driver Outputs. OUT0 to OUT15 are open-drain, constant-current-sinking outputs rated to 28V.
OE
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.
DOUT
SET
V+
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.
CLK
MAX6971
DIN
D0 SERIAL-TO-PARALLEL SHIFT REGISTER D15
LE
D0
LATCHES
D15
POWER-ON
RESET
OE
V+
D0
CONSTANT-CURRENT SINKS
D15
CURRENT
REFERENCE
Figure 1. Block Diagram
OUT0
OUT2
OUT1
OUT3
OUT15
OUT4
GND
DOUT
V+
RSET
GND
6 _______________________________________________________________________________________
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