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APW7207CTI-TRG Datasheet(PDF) 1 Page - Anpec Electronics Coropration |
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APW7207CTI-TRG Datasheet(HTML) 1 Page - Anpec Electronics Coropration |
1 / 16 page Copyright © ANPEC Electronics Corp. Rev. A.2 - Dec., 2009 APW7207 www.anpec.com.tw 1 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. 1MHz, High-Efficiency, Step-Up Converter for 2 to 6 White LEDs The APW7207 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 6 white LEDs in series. Features • Wide Input Voltage from 2.5V to 6V • 0.2V Reference Voltage • Fixed 1MHz Switching Frequency • High Efficiency up to 88% • 100Hz to 100kHz PWM Brightness Control Fre- quency • Open-LED Protection • Under-Voltage Lockout Protection • Over-Temperature Protection • <1 µA Quiescent Current During Shutdown • TSOT-23-6A Packages • Lead Free and Green Devices Available (RoHS Compliant) Applications General Description • White LED Display Backlighting • Cell Phone and Smart Phone • PDA, PMP, and MP3 • Digital Camera Simplified Application Circuit Pin Configuration The series connection allows the LED current to be iden- tical for uniform brightness. Its low on-resistance of N- FET and feedback voltage reduces power loss and achieves high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops switching if exceeds the over-voltage threshold. An inter- nal soft-start circuit eliminates the inrush current during start-up. The APW7207 also integrates under-voltage lockout, over-temperature protection, and current limit circuits. The APW7207 is available in TSOT-23-6A packages. GND VIN V OUT EN LX FB OVP 4 6 5 3 2 1 L1 22 µH C2 1 µF C1 2.2 µF R1 10 Ω V IN Up to 6 WLEDs OFF ON 4 EN 6 VIN GND 2 5 OVP FB 3 LX 1 TSOT-23-6A (Top View) |
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