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AP8801M8G-13 Datasheet(PDF) 3 Page - Diodes Incorporated |
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AP8801M8G-13 Datasheet(HTML) 3 Page - Diodes Incorporated |
3 / 11 page AP8801 500mA LED Step-down Converter AP8801 Rev. 4 3 of 11 DECEMBER 2009 DS31765 www.diodes.com © Diodes Incorporated Pin Name Description SW Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI. GND GND pin SET Set Nominal Output Current Pin. Configure the output current of the device. CTRL Dimming and On/Off Control Input. Input voltage of 0.2V or lower forces the device into low current standby mode and shuts off the output. A PWM signal allows the output current to be adjusted above or below the level set by the resistor connected to SET input pin. The input impedance is about 50k Ω, and if the pin is left open V CTRL = VREF VIN Input Supply Pin. Must be locally bypassed. NC No connection Block Diagram Voltage Regulator 5V R CTRL VIN GND SET SW Sensing Block VREF 1.25V AP8801 PWM/DC Control Figure 2: AP8801 Block Diagram Pin Descriptions |
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