SC5012
2016-07-13
| 基本数据 |
【基本数据】 
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| 产品特性 |
【产品特性】 Input voltage — 4.75V to 45VOutput 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 |
【产品应用】 Medium-sized LCD PanelAutomotive Car Navigation/Information Display LCD Monitors |
| 文字介绍 |
【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。 |