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AL9910AS-13 Datasheet(PDF) 2 Page - Diodes Incorporated |
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AL9910AS-13 Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 15 page AL9910/AL9910A/AL9910-5 UNIVERSAL HIGH VOLTAGE HIGH BRIGHTNESS LED DRIVER AL9910/AL9910A/AL9910-5 Document number: DS 35103 Rev. 3 - 2 2 of 15 www.diodes.com June 2011 © Diodes Incorporated Pin Descriptions Pin Name SO-8 SO-8EP Descriptions VIN 1 1 Input voltage CS 2 2 Senses LED string and external MOSFET switch current GND 3 3 Device ground Gate 4 4 Drives the gate of the external MOSFET switch. PWM_D 5 5 Low Frequency PWM Dimming pin, also Enable input. Internal 100k Ω pull-down to GND VDD 6 6 Internally regulated supply voltage. • 7.5V nominal for AL9910 and • 10V nominal for AL9910A. 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 crossing. LD 7 7 Linear Dimming input. Changes the current limit threshold at current sense comparator and changes the average LED current. ROSC 8 8 Oscillator control. A resistor connected between this pin and ground sets the PWM frequency. The devices can be switched into constant off time (PFM) mode by connecting the external oscillator resistor between ROSC pin and the gate of the external MOSFET. EP PAD N/A EP Exposed Pad (bottom). Connect to GND directly underneath the package. Functional Block Diagram 250mV LD V DD LDO V IN OTP PWM_D GND 7.5/10V OSC S RO R OSC GATE CS 100k V DD V IN R SENSE AL9910/AL9910A 250mV LD V DD LDO V IN OTP PWM_D GND 7.5/10V OSC S RO R OSC GATE CS 100k V DD V IN R SENSE AL9910/AL9910A |
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