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LP8864-Q1_V02 PDF预览

LP8864-Q1_V02

更新时间: 2024-11-16 02:51:59
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
89页 3154K
描述
LP8864-Q1 Automotive Display LED-backlight Driver with Four 200-mA Channels

LP8864-Q1_V02 数据手册

 浏览型号LP8864-Q1_V02的Datasheet PDF文件第2页浏览型号LP8864-Q1_V02的Datasheet PDF文件第3页浏览型号LP8864-Q1_V02的Datasheet PDF文件第4页浏览型号LP8864-Q1_V02的Datasheet PDF文件第5页浏览型号LP8864-Q1_V02的Datasheet PDF文件第6页浏览型号LP8864-Q1_V02的Datasheet PDF文件第7页 
LP8864-Q1  
SNVSBD2A – AUGUST 2020 – REVISED OCTOBER 2020  
LP8864-Q1 Automotive Display LED-backlight Driver with Four 200-mA Channels  
1 Features  
2 Applications  
AEC-Q100 qualified for automotive applications:  
– Device temperature grade 1:  
Backlight for:  
– Automotive infotainment  
– Automotive instrument clusters  
– Smart mirrors  
–40°C to +125°C, TA  
– Device HBM ESD classification level 2  
– Device CDM ESD classification level C4B  
Input voltage operating range 3 V to 48 V  
Four high-precision current sinks  
– Heads-up displays (HUD)  
3 Description  
The LP8864-Q1 is an automotive high-efficiency LED  
driver with boost controller. The Four high-precision  
current sinks support phase shifting that is  
automatically adjusted based on the number of  
channels in use. LED brightness can be controlled  
globally through the I²C interface or PWM input.  
– Up to 200-mA DC current for each current sink  
– Current matching 1% (typical)  
– Dimming ratio 32 000:1 using 152-Hz LED  
output PWM frequency  
– Up to 16-bit LED dimming resolution with I2C,  
or PWM input  
The boost controller has adaptive output voltage  
control based on the headroom voltages of the LED  
current sinks. This feature minimizes the power  
consumption by adjusting the boost voltage to the  
lowest sufficient level in all conditions. A wide-range  
adjustable frequency allows the LP8864-Q1 to avoid  
disturbance for AM radio band.  
– 8 Configurable LED strings configuration  
Auto-phase shift PWM dimming  
12-bit analog dimming  
Up to 48-V VOUT boost or SEPIC DC/DC controller  
– Switching frequency 100 kHz to 2.2 MHz  
– Boost spread spectrum for reduced EMI  
– Boost sync input to set boost switching  
frequency from an external clock  
The LP8864-Q1 supports built-in hybrid PWM  
dimming and analog current dimming, which reduces  
EMI, extends the LED lifetime, and increases the total  
optical efficiency.  
– Output voltage automatically discharged when  
boost is disabled  
Extensive fault diagnostics  
Device Information  
PART NUMBER(1)  
PACKAGE  
HTSSOP (38)  
QFN (32)(2)  
BODY SIZE (NOM)  
9.70 mm × 4.40 mm  
5 mm × 5 mm  
LP8864-Q1  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
(2) Product preview.  
95  
90  
85  
80  
VOUT = 29 V  
VOUT = 36 V  
VOUT = 42 V  
VOUT = 46 V  
75  
0
10  
20  
30  
40  
50  
60  
Brightness (%)  
70  
80 90 100  
D007  
System Efficiency  
Simplified Schematic  
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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