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MP3393EY Datasheet(PDF) 6 Page - Monolithic Power Systems |
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MP3393EY Datasheet(HTML) 6 Page - Monolithic Power Systems |
6 / 19 page MP3393—8-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER MP3393 Rev. 1.05 www.MonolithicPower.com 6 3/26/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. PIN FUNCTIONS Pin # Name Description 1 VIN Supply Input. The power to the chip, as well as the step-up converter switch. Drive VIN with 9V-to-32V power source. Must be locally bypassed. 2 VCC Internal 10V Linear Regulator Output. Provides power for the internal MOSFET switch gate driver and the internal control circuitry. Bypass VCC to GND with a ceramic capacitor. 3 COMP Step-up Converter Compensator. Compensates the regulation control loop. Connect a ceramic capacitor from COMP to GND. 4 OSC Switching Frequency Set. Connect a resistor between OSC and GND to set the step-up converter’s switching frequency. The voltage at this pin is regulated to 1.23V. The clock frequency is proportional to the current sourced from this pin. 5 EN Enable Control Input. Do not leave this pin floating. Use a ceramic capacitor for local filtering. 6 DIM Dimming. For PWM dimming, apply an external PWM signal with amplitude greater than 1.5V. For analog dimming, apply a DC voltage ranging from 0.4V to 1.5V to linearly set the LED current from 0% to 100%. 7 FB1 LED Current Feedback. Detects the channel 1 current. 8 CTL1 External Transistor Control Pin. Connect it to the base of an external transistor to regulate the channel 1 current. 9 FB2 LED Current Feedback. Detects the channel 2 current. 10 CTL2 External Transistor Control Pin. Connect it to the base of an external transistor to regulate the channel 2 current. 11 FB3 LED Current Feedback. Detects the channel 3 current. 12 CTL3 External Transistor Control Pin. Connect it to the base of an external transistor to regulate the channel 3 current. 13 FB4 LED Current Feedback. Detects the channel 4 current. 14 CTL4 External Transistor Control Pin. Connect it to the base of an external transistor to regulate the channel 4 current. 15 CTL5 External Transistor Control Pin. Connect it to the base of an external transistor to regulate the channel 5 current. 16 FB5 LED Current Feedback. Detects the channel 5 current. |
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