IC 5121 G5121 G5121TB1U SOT23-6 (SMD Dán)

Thông số kỹ thuật:

Features
The is a step-up DC/DC converter specifically designed to drive to 5 series white LEDs with constant current. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminates the need for ballast resistors. The G5121 switches at 1MHz, allowing the use of tiny external components. A low 0.254V feedback voltage minimizes power loss in the current setting resistor for high efficiency. The OVP pin monitors the output voltage and turns off the converter whenever the LEDs are open. The G5121 is available in low profile SOT-23-6 and TSOT-23-6 package.
Inherently Matched LED Current High Efficiency: 87% Drives Up to Five LEDs from 2.5V Supply 24V Internal Power Switch Fast 1MHz Switching Frequency Uses Tiny 1mm Tall Inductors Requires Only 1µF Output Capacitors 19.5V Over Voltage Protection SOT-23-6 and TSOT-23-6 Package

Applications
White LED Backlight Display for PDA Pocket PC Smart Phones Handheld Devices Cellular Phones
Junction Temperature.125°C Storage to 150°C Reflow Temperature (soldering, 10sec). 260°C ESD Rating (Human Body Model).2kV
Stress beyond those listed under "Absolute Maximum Rating" may cause permanent damage to the device.
Input Voltage Range Input Voltage UVLO Over Voltage Protection Threshold Over Voltage Protection Threshold OVP Pin Input Current Quiescent Current trigger release Vovp = 16V VFB = 0.3V (no switching) VFB = 0.2V (switching) V SHDN = 0V Initial Accuracy Temperature Coefficient VFB = 0.2V ISW = 150mA VSW = 20V
FB Comparator Trip Point Switching Frequency Maximum Duty Switch RDS(ON) Switch Leakage Current Switch Current Limit Soft Start Time

Datasheet:

https://www.digchip.com/datasheets/parts/datasheet/183/G5121TB1U-pdf.php

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