LED驱动器
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ETA(钰泰半导体)
LED驱动器
ETA3300
The ETA3300 PFM step-up Converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LEDs brightness. The fast 500KHz to 3MHz operation frequency allows for smaller capacitor and inductor. Fault condition protection uses cycle-by cycle current limiting to sense maximum inductor current and over-voltage protection. The 0.2V low reference voltage minimized the power loss across the current sense resistor.
The converter can operate from 2V to 6V, and capable of delivering maximum 200mA output current at 4-LEDs application with 3V input voltage. Quiescent current drawn from power source is as low as 120uA. All of these features make ETA3300 be suitable for the portable devices, which are supplied by a single battery.
ETA3300 is available in SOT23-6 package that is PB free.
FEATURES
Up to 24V Output Voltage
Wide Operation Range: 2V to 6V
Maximum 3MHz Operating Frequency
PWM Dimming Control
Shutdown Current <1uA
Current Limit Cycle-by-Cycle
Low Current Sense Threshold: 200mV
24V Over Output Voltage Protection
Compact SOT23-6 Package
APPLICATIONS
Compact Back Light Module
Power Source for LED
Constant Current Source
需要样品测试或详细资料请联系：18126521362（点击复制微信号）
