TLC5921_17 Datasheet, PDF (1/18 Pages) Texas Instruments – LED DRIVER

TLC5921
LED DRIVER
D Drive Capability and Output Counts
– 80 mA (Current Sink) x 16 Bits
D Constant Current Output Range
– 1 to 80 mA (Current Value Setting for All
Output Terminals Using External Resistor)
D Constant Current Accuracy
– ± 1% (Typ)
– ± 4% (Max) (Maximum Error Between
Bits, All Bits On)
D Voltage Applied to Constant Current Output
Terminal
– Minimum 0.6 V (Output Current 40 mA)
– Minimum 1 V (Output Current 80 mA)
D Data Input
– Clock Synchronized 1 Bit Serial Input
D Data Output
– Clock Synchronized 1 bit Serial Output
(With Timing Selection)
D Input/Output Signal Level . . . CMOS Level
D Power Supply Voltage . . . 4.5 V to 5.5V
D Maximum Output Voltage . . . 17 V (Max)
D Data Transfer Rate . . . 20 MHz (Max)
D Operating Free-Air Temperature Range
–20°C to 85°C
D Available in 32 Pin HTSSOP DAP Package
(P_D=3.9 W,
T_A = 25°C)
D LOD Function . . . LED Open Detection
(Error Signal Output at LED Disconnection)
D TSD Function . . . Thermal Shutdown (Turn
Output Off When Junction Temperature
Exceeds Limit)
SLLS390 – SEPTEMBER 1999
DAP PACKAGE
(TOP VIEW)
GND ₁
BLANK ₂
XLAT ₃
SCLK 4
SIN 5
PGND 6
OUT0 7
OUT1 8
PGND 9
OUT2 10
OUT3 11
OUT4 12
OUT5 13
PGND 14
OUT6 15
OUT7 16
32 ^VCC
31 ^IREF
30 ^SOMODE
29 XDOWN
28 SOUT
27 PGND
26 OUT15
25 OUT14
24 PGND
23 OUT13
22 OUT12
21 OUT11
20 OUT10
19 PGND
18 OUT9
17 OUT8
description
The TLC5921 is a current-sink constant current driver incorporating shift register and data latch. The current
value at constant current output can be set by one external register. The device also incorporates thermal
shutdown (TSD) circuitry which turns constant current output off when the junction temperature exceeds the
limit, and LED open detection (LOD) circuitry to report the LED was disconnected.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 1999, Texas Instruments Incorporated
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