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LP55231 bảng dữ liệu(PDF) 48 Page - Texas Instruments

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tên linh kiện LP55231
Giải thích chi tiết về linh kiện  LP55231 Programmable 9-Output LED Driver
PDF  53 Pages
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nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
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LP55231 bảng dữ liệu(HTML) 48 Page - Texas Instruments

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LP55231
D1
D2
D3
D4
D5
D7
D8
D6
D9
VOUT
COUT1
1 PF
C2
0.47 PF
ASEL0
ASEL1
GND
MCU
SCL
SDA
CLK
TRIG
INT
CIN1
1 PF
VIN = 2.7V TO 5.5V
VDD
C1
0.47 PF
C1+ C1- C2+ C2-
R1
R
B
G
R
B
G
G
LP55231
D1
D2
D3
D4
D5
D7
D8
D6
D9
VOUT
COUT2
1 PF
C4
0.47 PF
CIN2
1 PF
VDD
C3
0.47 PF
C1+ C1- C2+ C2-
R
B
G
R
B
G
R
B
G
VIN
VIO
R2
R3
R4
EN
SCL
SDA
CLK
TRIG
INT
EN
ASEL0
ASEL1
GND
VIO
R
B
G
LP55231
SNOSCR5 – MARCH 2013
www.ti.com
Typical Applications
Figure 28. Typical Application Circuits
The LP55231 enables up to four parallel devices together, which can drive up to 12 RGB LEDs or 36 single
LEDs. This diagram shows the connections for two LP55231 devices for six RGB LEDs. Note that D7, D8, and
D9 outputs are used for the red LEDs. The SCL and SDA lines should each have a pullup resistor placed
somewhere on the line (R3 and R4; The pullup resistors are normally located on the bus master.). In typical
applications values of 1.8k to 4.7k are used, depending on the bus capacitance, I/O voltage and the desired
communication speed. INT and TRIG are open-drain pins, so they need pullup resistors. Typical values for R1
and R2 are from 120k to 180k for two devices.
48
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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: LP55231



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