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TLC5923 Datasheet

  • TLC5923

  • 具有點校正功能的 16 通道 LED 驅(qū)動器

  • 19頁

  • TI

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TLC5923
www.ti.com
SLVS550 鈥?DECEMBER 2004
LED DRIVER
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
16 Channels
Drive Capability
鈥?0 to 80 mA (Constant-Current Sink)
Constant Current Accuracy
鈥?/div>
鹵1%
(typical)
Serial Data Interface
Fast Switching Output: T
r
/ T
f
= 10ns (typical)
CMOS Level Input/Output
30 MHz Data Transfer Rate
V
CC
= 3.0 V to 5.5 V
Operating Temperature = -20擄C to 85
擄C
LED Supply Voltage up to 17 V
32-pin HTSSOP (PowerPAD鈩? Package
Dot Correction
鈥?7 bit (128 Steps)
鈥?individual adjustable for each channel
Controlled In-Rush Current
Error Information
鈥?LOD: LED Open Detection
鈥?TEF: Thermal Error Flag
VCC
GND PGND SCLK
SIN
MODE
0
1
1
0
LOD
APPLICATIONS
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鈥?/div>
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Monocolor, Multicolor, Fullcolor LED Display
Monocolor, Multicolor LED Signboard
Display Backlighting
Multicolor LED lighting applications
DESCRIPTION
The TLC5923 is a 16 channel constant-current sink
driver. Each channel has a On/Off state and a
128-step adjustable constant current sink (dot correc-
tion). The dot correction adjusts the brightness vari-
ations between LED, LED channels and other LED
drivers. Both dot correction and On/Off state are
accessible via a serial data interface. A single exter-
nal resistor sets the maximum current of all 16
channels.
The TLC5923 features two error information circuits.
The LED open detection (LOD) indicates a broken or
disconnected LED at an output terminal. The thermal
error flag (TEF) indicates an overtemperature con-
dition.
鈥?/div>
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MODE
XLAT
BLANK
0
0
IREF
Max. OUTn
Current
On/Off
Input
Shift
Register
0
On/Off Register
0
7鈭抌it DC Register
6
Constant Current
Driver
Delay
x0
OUT0
BLANK
16
16
LOD
1
Constant Current
Driver
Delay
x1
OUT1
15
0
112
1
On/Off Register
7
7鈭抌it DC Register
13
LED Open
Detection
(LOD)
Temperature
Error Flag
(TEF)
1 0
DC Input
Shift
Register
BLANK
BLANK
LOD
111
15
Constant Current
Driver
Delay
x15
OUT15
XERR
0
1
MODE
SOUT
15
On/Off Register
105
7鈭抌it DC Register
111
Figure 1. Function Block Diagram
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.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2004, Texas Instruments Incorporated

TLC5923 PDF文件相關型號

TLC5941,TLK1002A,TLK1201A,TLK1201AI

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