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G2621 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G2621 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 1 page  Ver: 0.1 Jan 24, 2013 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G2621 Global Mixed-mode Technology High Efficiency, Constant Current 40V White-LEDs Driver Feature Operating Voltage: 2.5V to 5.5V. High Operating Frequency: 1MHz High Output Voltage: Up to 40V(Typ.) Digital Dimming Control. Built-in Cycle-by Cycle Current-Limiting. Built-in Soft-Start Function. 0.2V Low Reference Voltage Thermal Overload Protection SOT-23-6 Package Application GPS Navigation System Compact Back Light Module Constant Current Source LED Module Description The G2621 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 LED’s brightness. The fast 1.0MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.2V low reference voltage minimized the power loss across the current-setting resistor. The G2621 is available in SOT-23-6 packages. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G2621TB1U 2621x -40°C to 85°C SOT-23-6 Note: TB: SOT23-6 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit Use the tantalum capacitor to eliminate inductor noise on ※ output terminal when you want to control dimming function. VIN EN OVP GND FB LX 1 2 3 4 5 6 G2621 SOT-23-6 VIN EN OVP GND FB LX 1 2 3 4 5 6 G2621 SOT-23-6 |
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