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LP5520

更新时间： 2023-09-03 20:26:39
品牌 Logo 应用领域
德州仪器 - TI 驱动驱动器
页数 文件大小 规格书
46页 782K
描述
RGB 背光 LED 驱动器

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中文翻译

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LP5520 数据手册

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LP5520  
SNVS440B –MAY 2007–REVISED MARCH 2016  
LP5520 RGB Backlight LED Driver  
1 Features  
3 Description  
The LP5520 is an RGB backlight LED driver for small  
format color LCDs. RGB backlights enable better  
colors on the display and power savings compared  
with white LED backlights. The device offers a small  
and simple driver solution without need for optical  
feedback. Calibration in display module production  
can be done in one temperature. The LP5520  
produces true white light over a wide temperature  
range. Three independent LED drivers have accurate  
programmable current sinks and PWM modulation  
control. Using internal calibration memory and  
external temperature sensor, the RGB LED currents  
are adjusted for perfect white balance independent of  
the brightness setting or temperature. The user  
programmable calibration memory has intensity vs  
temperature data for each color. This white balance  
calibration data can be programmed to the memory  
on the production line of a backlight module.  
1
•
Temperature Compensated LED Intensity and  
Color  
•
•
•
•
Individual Calibration Coefficients for Each Color  
Color Accuracy ΔX and ΔY ≤ 0.003  
12-Bit ADC for Measurement of 2 Sensors  
Adjustable Current Outputs for Red, Green, and  
Blue (RGB) LED  
•
•
•
•
•
•
•
•
•
0.2% Typical LED Output Current Matching  
PWM Control Inputs for Each Color  
SPI™ and I2C-Compatible Interface  
Stand-Alone Mode With One-Wire Control  
Sequential Mode for One Color at a Time  
Magnetic High Efficiency Boost Converter  
Programmable Output Voltage from 5 V to 20 V  
Adaptive Output Voltage Control Option  
< 2-µA Typical Shutdown Current  
The device has a magnetic boost converter that  
creates a supply voltage of up to 20 V LED from the  
battery voltage. The output can be set at 1-V steps  
from 5 V to 20 V. In adaptive mode the circuit  
automatically adjusts the output voltage to minimum  
sufficient level for lowest power consumption.  
Temperature is measured using an external  
temperature sensor placed close to the LEDs. The  
second ADC input can be used, for example, for  
ambient light measurement.  
2 Applications  
•
•
Color LCD Display Backlighting  
LED Lighting Applications  
Device Information(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (MAX)  
LP5520  
DSBGA (25)  
2.787 mm × 2.621 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Typical Application  
D1  
L1  
2.9 œ 5.5V  
5 œ 20V  
4.7 mH  
C
C
C
VDDA  
VDDD  
IN  
C
OUT  
2 x  
100 nF  
100 nF  
4.7 mF  
4.7 mF  
1 mF  
V
V
DDD  
SW  
DDA  
V
LDO  
C
VLDO  
S1_IN  
S2_IN  
CALIBRATION  
MEMORY  
FB  
ADC  
BOOST  
V
LDO  
LM 20  
NRST  
SS/SDA  
SCK/SCL  
LP5520  
MCU  
WITH  
I2C  
SPI/I2C  
INTER-  
FACE  
LP55XX  
SI/A0  
SO  
OR  
SPI  
IFSEL  
V
DDIO  
COLOR AND  
BRIGHTNESS  
PWM LOGIC  
LED  
DRIVERS  
ROUT  
GOUT  
BOUT  
PWMR  
PWMG  
PWMB  
BRC  
C
VDDIO  
100 nF  
GND  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
 
 
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LP5521TM/NOPB NSC

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 		IC LED DISPLAY DRIVER, PBGA20, 2.10 X 1.70 MM, 0.60 MM HEIGHT, 0.40 MM PITCH, ROHS COMPLIA
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 		具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器 | YFQ |
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