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MP3302DJ Datasheet(PDF) 4 Page - Monolithic Power Systems |
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MP3302DJ Datasheet(HTML) 4 Page - Monolithic Power Systems |
4 / 12 page MP3302 –40V, 1.3A, SINGLE-CELL STEP-UP WHITE LED DRIVER WITH SINGLE WIRE DIMMING CONTROL MP3302 Rev. 0.98 www.MonolithicPower.com 4 5/5/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. PIN FUNCTIONS TSOT23-5 Pin # QFN8 Pin # Name Pin Function 1 8 SW Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power inductor and output rectifier to SW. SW can swing between GND and 36V. 2 1, 5 GND, Exposed Pad Ground. Connect exposed pad to GND plane for proper thermal performance. 3 6 FB Feedback Input. The MP3302 regulates the voltage across the current sense resistor between FB and GND. Connect a current sense resistor from the bottom of the LED string to GND. Connect the bottom of the LED string to FB. The regulation voltage is 200mV. 4 4 EN ON/OFF Control and Dimming Command Input. A voltage greater than 0.6V will turn the part on and less than 0.4V will turn the part off. If the EN pin voltage is between 0.7V and 1.4V, VFB is regulated between 0V and 200mV. To use PWM dimming, apply a 200Hz to 1KHz square wave signal with amplitude greater than 1.5V to this pin. 5 2 IN Input Supply Pin. Must be locally bypassed. 3 NC No Connect. |
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