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SKY81452-13-001

产品描述LED Lighting Drivers Six-Channel,high efficiency White LED Dr
产品类别模拟混合信号IC    驱动程序和接口   
文件大小202KB,共4页
制造商Skyworks(思佳讯)
官网地址http://www.skyworksinc.com
标准
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SKY81452-13-001概述

LED Lighting Drivers Six-Channel,high efficiency White LED Dr

SKY81452-13-001规格参数

参数名称属性值
是否Rohs认证符合
厂商名称Skyworks(思佳讯)
Reach Compliance Codecompliant
ECCN代码EAR99
接口集成电路类型LED DISPLAY DRIVER
峰值回流温度(摄氏度)NOT SPECIFIED
处于峰值回流温度下的最长时间NOT SPECIFIED

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PRODUCT SUMMARY
SKY81452: Six-Channel, High Efficiency White LED Driver
with Touch Screen Driver Supply
Applications
Tablet PCs
Notebook computers
Monitors
Portable TV/DVD players
Fault protection and independent channel shutdown for:
Open or shorted LED(s)
Boost over-voltage and current protection
Over temperature condition
Ultra small, low profile WLCSP (25-bump,
2.44 mm x 2.44 mm) package (MSL1, 260
°C
per
JEDEC J-STD-020)
Features
Input voltage range: 2.5 V to 5.5 V
Integrated 28 V boost converter
Up to 91% efficiency
Minimum off time: 50 ns
Six current channels, 60 mA per channel
Adjustable switching frequency: 600 kHz to 2 MHz
Programmable boost current limit
Accuracy matching: ±1.5% @ 30 mA
Fade in/out feature for brightness control
Touch panel bias output: 4.5 V to 25.0 V
I
2
C interface control
Direct PWM dimming (100 Hz to 50 kHz)
Individual channel enable/disable, fault trigger point, and status
programming
Eight-bit/256 programmable analog dimming
Ten-bit PWM duty control (f
PWM
= 100 Hz to 25 kHz)
Eight-bit PWM duty control (25 kHz < f
PWM
≤ 50 kHz)
Dimming mode selection (DPWM, analog)
Programmable maximum LED current and boost oscillation
frequency using external resistor setup
Phase shift control
System VSYNC input to synchronize/truncate PWM dimming
(45 Hz to 300 Hz range)
Description
The SKY81452 is a highly integrated, high efficiency LED backlight
solution for tablets, notebook computers, monitors, and other
portable devices.
An integrated boost converter provides a high voltage output for
driving up to 28 V. Six precision current sinks are programmable
up to 60 mA per string. The integrated boost regulator switching
frequency is adjustable from 600 kHz to 2 MHz for system
integration flexibility, which optimizes efficiency and minimizes
external passive component requirements.
The SKY81452 supports Direct Pulse Width Modulation (DPWM)
dimming and Analog Pulse Width Modulation (APWM). In the
DPWM dimming mode, the output waveform follows the Pulse
Width Modulation Input (PWMI) signal and the current level is set
by I
2
C control and an external RSET resistor. In the APWM mode,
the PWMI signal duty and the I
2
C brightness control signal are
multiplied to control the output current level.
When the PWM pin is not used, it should be pulled high.
For system protection, the SKY81452 senses open or short LED
conditions and over temperature events. High voltage current sink
design prevents damage resulting from shorted LEDs. System
faults are reported through the I
2
C interface.
The SKY81452 is available in a space saving
2.44 mm x 2.44 mm, 25-bump Wafer-Level Chip Scale Package
(WLCSP). Typical application circuits are shown in Figure 1 (single
cell input) and in Figure 2 (dual cell input).
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202714F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • August 7, 2013
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