代理产线

SC5012

 2016-07-13

【基本数据】

【产品特性】

Input voltage — 4.75V to 45V
Output voltage—up to 65V
Step-up (Boost) Controller
Ultra-Fast Transient Response
Programmable Switching Frequency
External Sync Frequency for Boost Controller
Linear Current Sinks
4 Strings, up to 150mA/String
Current Matching ±1%
Current Accuracy ±2%
PWM Dimming
String-by-String Phase Shifting
Dimming Frequency 100Hz-30kHz
User Selectable 9 or 10 Bits Dimming Resolution
Optional Synchronization to VSYNC/HSYNC Signal
8-bit Analog Dimming
I2C Interface
Fault Status — Open/Short LED, OTP
Device Control: SYNC Freq, PLL Setting
Protection Features
Open/Shorted LED(s) and adjustable OVP
Over-Temperature
4mm X 4mm 24 Ld QFN Package
Up to 150mA/Channel
 Adj Switch Freq 200kHz-2.2MHz
 Channel Current Matching: 1%
 Channel Current Accuracy: 2%
 PWM Dimming (100Hz–30KHz)
 5000:1 Dimming Ratio
 9 or 10 Bit Dimming Resolution
 8-Bit Analog Dimming
 Phase Shifted Operation
 Optional FSYNC / VSYNC
 I2C Control / Configuration
 OVP, OCP, UVLO, Open/Short LED Protection

【产品应用】

Medium-sized LCD Panel
Automotive Car Navigation/Information Display
LCD Monitors

【文字介绍】

SC5012是一款4通道高精度,高效率升压(升压)HB LED驱动器设计用于背光应用。它具有宽输入电压范围(4.75V至45V),灵活的输出配置,宽Analog和PWM调光范围,相移,时明时暗可选,外部升压控制器频率同步(FSYNC),I2C接口,以及众多保护功能。
该升压控制器,在200kHz的可编程开关频率至2.2MHz,可通过动态减少,同时保持LED的电流精度输出电压最大限度地提高效率。它提供了卓越的电压和无需外部补偿组件负载响应。每串电流中的精湛照明均匀度±1%的匹配,每串电流精度为±2%。一个外部电阻调节每串40-150mA的电流。此外,它还采用了9 or 10 Bits Dimming Resolution(可选)在从100Hz调光频率到20kHz,同步到同步信号,提升振荡器PWM调光分辨率。串与串相移减小了输入/输出电容的需求,降低电磁干扰,并提高调光的线性度。