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MP3389 Arkusz danych(PDF) 8 Page - Monolithic Power Systems |
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MP3389 Arkusz danych(HTML) 8 Page - Monolithic Power Systems |
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8 / 16 page ![]() MP3389—12-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER MP3389 Rev. 1.04 www.MonolithicPower.com 8 3/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. FUNCTION DIAGRAM Control Logic + - Current Sense Amplifier + - PWM Comparator Oscillator + - 1.23V OV Comparator + - + - LED1 + - DPWM Oscillator DPWM Comparator 1.22V Max Min Feedback Control 5.5V EA LED OV Comparator Short String Protection Regulator LED12 OVP ISENSE GND VIN VCC DBRT BOSC ISET COMP OSC EN Enable Control 600 mV GATE PGND VFAULT Current Control Figure 1—MP3389 Function Block Diagram |
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