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STD7NK40ZT4 데이터시트(PDF) 4 Page - Diodes Incorporated |
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STD7NK40ZT4 데이터시트(HTML) 4 Page - Diodes Incorporated |
4 / 14 page AL9910EV8 120VAC ND Ref Design Report October 2011 AL9910-EV8 (10/27/2011) Page 4 of 14 2. EVALUATION BOARD INFORMATION 2.1 AL9910 Pin Assignment and Description AL9910 Pin Assignment SO-8 1 2 3 4 5 6 7 8 (Top View) CS Gate GND LD VIN Rosc VDD PWM_D AL9910 AL9910 Pin Description Pin Name Pin Number Description VIN 1 Input voltage CS 2 Senses LED string current GND 3 Device ground Gate 4 Drives the gate of the external MOSFET PWM_D 5 Low Frequency PWM Dimming pin, also Enable input. Internal 100kΩ pull-down to GND VDD 6 Internally regulated supply voltage. 7.5V nominal for AL9910. Can supply up to 1 mA for external circuitry. A sufficient storage capacitor is used to provide storage when the rectified AC input is near the zero crossings LD 7 Linear Dimming by changing the current limit threshold at current sense comparator ROSC 8 Oscillator control. A resistor connected between this pin and ground sets the PWM frequency. |
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