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TLC5947 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
封装:
HTSSOP-32
描述:
24通道，12位PWM LED驱动器 24-Channel, 12-Bit PWM LED Driver with
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
TLC5947数据手册
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1
FEATURES
APPLICATIONS
DESCRIPTION
¼
SIN
SCLK
XLAT
BLANK
SOUT
VCC
GND
TLC5947
IC1
OUT0 OUT23
¼ ¼
DATA
SCLK
XLAT
BLANK
¼
R
IREF
IREF
Controller
3
V
CC
¼ ¼
V
LED
V
LED
¼
V
LED
V
LED
¼ ¼ ¼
¼
SIN
SCLK
XLAT
BLANK
SOUT
VCC
GND
TLC5947
ICn
OUT0 OUT23
R
IREF
IREF
V
CC
TLC5947
www.ti.com
................................................................................................................................................. SBVS114A – JULY 2008 – REVISED SEPTEMBER 2008
24-Channel, 12-Bit PWM LED Driver with
Internal Oscillator
• Noise Reduction:
23
• 24 Channels, Constant Current Sink Output – 4-channel grouped delay to prevent inrush
current
• 30-mA Capability (Constant Current Sink)
• Operating Temperature: – 40 ° C to +85 ° C
• 12-Bit (4096 Steps) PWM Grayscale Control
• LED Power-Supply Voltage up to 30 V
• V
CC
= 3.0 V to 5.5 V
• Static LED Displays
• Constant Current Accuracy:
• Message Boards
– Channel-to-Channel = ± 2% (typ)
• Amusement Illumination
– Device-to-Device = ± 2% (typ)
• TV Backlighting
• CMOS Logic Level I/O
• 30-MHz Data Transfer Rate (Standalone)
• 15-MHz Data Transfer Rate (Cascaded Devices,
The TLC5947 is a 24-channel, constant current sink
SCLK Duty = 50%) LED driver. Each channel is individually adjustable
with 4096 pulse-width modulated (PWM) steps. PWM
• Shift Out Data Changes With Falling Edge to
control is repeated automatically with the
Avoid Data Shift Errors
programmed grayscale (GS) data. GS data are
• Auto Display Repeat
written via a serial interface port. The current value of
all 24 channels is set by a single external resistor.
• 4-MHz Internal Oscillator
• Thermal Shutdown (TSD):
The TLC5947 has a thermal shutdown (TSD) function
that turns off all output drivers during an
– Automatic shutdown at over temperature
over-temperature condition. All of the output drivers
conditions
automatically restart when the temperature returns to
– Restart under normal temperature
normal conditions.
1
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.
2 PowerPAD is a trademark of Texas Instruments, Inc.
3 All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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