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IW7023-00-QFN4 PDF预览

IW7023-00-QFN4

更新时间: 2024-11-15 01:22:15
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35页 1623K
描述
16-Channel LED Driver for LCD Panel Backlighting

IW7023-00-QFN4 数据手册

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iW7023  
16-Channel LED Driver for LCD Panel Backlighting  
1.0 Features  
2.0 Description  
The iW7023 is a high efficiency driver for LEDs. It is designed  
for use with mid-size LCD panels that use arrays of LEDs as  
a backlight source. It is able to communicate with up to one  
16-channel LED driver, 60V (max) per channel  
VIN: 9V to 28V  
Fully-integrated current-sink FETs with minimum external step-up or step-down PWM DC-DC converter to  
external components  
drive up to 16 separate strings of multiple series-connected  
LEDs.  
Two dynamic external boost or buck controller interfaces  
to optimize system power efficiency  
The iW7023 features dynamic output voltage control, which  
automatically chooses the lowest active LED source voltage  
to adjust the feedback voltage of a step-up or step-down  
converter. Through this function, the iW7023 is able to  
dynamically adjust the output voltage of up to two external  
step-up or step-down converters to optimize the system  
power efficiency.  
Patented BroadLED™ digital adaptive switch mode  
technology for high current matching at maximum  
efficiency  
x
x
Channel-to-channel matching accuracy ±2%  
Enables use of cheaper, loosely binned LED arrays  
for lower BOM cost  
The iW7023 also provides 16 constant current sinks with  
maximum ±2% current matching. The LED PWM dimming  
can be adjusted dynamically through a high bandwidth SPI  
interface, which provides users flexibility to control the light  
intensity of LEDs. In addition, users can provide versatile  
configurations of the iW7023 through SPI interface registers.  
High-speed PWM dimming via SPI interface  
x
x
x
x
High-bandwidth PWM-based dynamic local dimming  
PLL-locked VSYNC synchronized PWM  
Dimming range: 1% to 99.9%, 12-bit resolution  
The iW7023 can maintain very high efficiency even with the  
existence of LED channel total forward voltage mismatch,  
with the proprietary digital power management and patent  
pending adaptive switch mode LED current regulation  
technology.  
Dimming frequency support for NTSC, PAL and 3D  
game modes with 5-bit programmability in normal  
mode (controlled by SPI dimming interface)  
Direct and unsynchronized dimming via external PWM  
Per-channel current  
The iW7023 has multiple features to protect the LED  
channels from fault conditions, and these protections are  
LED PWM cycle-by-cycle based to ensure system reliability  
and provide consistent operation.  
x
x
Up to 150mA average  
Up to 240mA peak  
Comprehensive protection features:  
3.0 Applications  
Direct & Segment-Edge LED Backlit LCD TV  
Edge Type global dimming LED backlit LCD TV  
Medical, Industrial Monitors and Public Displays  
x
x
LED open and short-circuit fault protection  
Over-temperature shutdown  
48-lead QFN-7m-48L package  
iW7023  
Rev. 1.0  
Datasheet  
1 of 35  
© 2015 Dialog Semiconductor (UK) Ltd.  

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