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器件3D模型￥ 32.339
TLC5947DAPR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
LED驱动器
封装:
HTSSOP-32
描述:
24通道，12位PWM LED驱动器，内部振荡器 24-Channel, 12-Bit PWM LED Driver with Internal Oscillator
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3P4Hot
典型应用电路图在P18
原理图在P11P12P20
封装尺寸在P23P25P26
标记信息在P23P24
封装信息在P22P23P24P25P26
技术参数、封装参数在P4
应用领域在P1P33
电气规格在P6
导航目录
TLC5947DAPR数据手册
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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
SBVS114B –JULY 2008–REVISED JANUARY 2015
www.ti.com
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The device is a 24-channel, constant sink current, LED driver. This device can be connected in series to drive
many LED lamps with only a few controller ports. Output current control data and PWM control data can be
written from the SIN input terminal. The PWM timing reference clock can be supplied from the internal oscillation.
9.2 Typical Application
Figure 23. Typical Application Circuit (Multiple Daisy Chained TLC5947s)
9.2.1 Design Requirements
For this design example, use Table 2 as the input parameters.
Table 2. Design Parameters
DESIGN PARAMETER EXAMPLE VALUE
VCC input voltage range 3 V to 5.5 V
LED lamp (V
LED
) input voltage range Maximum LED forward voltage (V
F
) + IC knee voltage
SIN, SCLK, LAT, and BLANK voltage range Low level = GND, High level = VCC
9.2.2 Detailed Design Procedure
9.2.2.1 Define Basic Parameters
To begin the design process, a few parameters must be decided as following:
• Maximum output constant-current value for each color LED lamp
• Maximum LED forward voltage (V
F
)
• Are auto display function used
18 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated
Product Folder Links: TLC5947
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