代理產線

SC5012

 2016-07-13

【基本資料】

【產品特性】

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

【產品應用】

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

【文字介紹】

SC5012是一款4通道高精度,高效率升壓(升壓)HB LED驅動器設計用於背光應用。它具有寬輸入電壓範圍(4.75V至45V),靈活的輸出配置,寬Analog和PWM調光範圍,相移,時明時暗可選,外部升壓控制器頻率同步(FSYNC),I2C接口,以及眾多保護功能。
該升壓控制器,在200kHz的可編程開關頻率至2.2MHz,可通過動態減少,同時保持LED的電流精度輸出電壓最大限度地提高效率。它提供了卓越的電壓和無需外部補償元件負載響應。每串電流中的精湛照明均勻度±1%的匹配,每串電流精度為±2%。一個外部電阻調節每串40-150mA的電流。此外,它還採用了9 or 10 Bits Dimming Resolution(可選)在從100Hz調光頻率到20kHz,同步到同步信號,提升振盪器PWM調光分辨率。串與串相移減小了輸入/輸出電容的需求,降低電磁干擾,並提高調光的線性度。