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MP3397 Datasheet(PDF) 7 Page - Monolithic Power Systems |
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MP3397 Datasheet(HTML) 7 Page - Monolithic Power Systems |
7 / 16 page MP3397—4-STRING, MAX 350mA/STRING WHITE LED DRIVER MP3397 Rev. 1.01 www.MonolithicPower.com 7 9/4/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN =12V, 10 LEDs in series, 4 strings in parallel, 220mA/string, unless otherwise noted. VSW 20V/div. VCOMP 1V/div. VOUT 20V/div. ILED 2A/div. Steady State VSW 20V/div. VOUT 20V/div. VIN 10V/div. ILED 500mA/div. Vin Startup VSW 20V/div. VOUT 20V/div. VEN 5V/div. ILED 500mA/div. Ven Startup VSW 20V/div. VBOSC 1V/div. VOUT 20V/div. ILED 1A/div. DC Burst Dimming VPWM = 0.9V, CBOSC = 2.2nF VSW 20V/div. VOUT 20V/div. VPWM 5V/div. ILED 1A/div. External PWM Dimming fPWM = 200Hz, DPWM = 50% VSW 20V/div. VOUT 20V/div. ILED 1A/div. Open LED Protection Open all LED strings at working VSW 20V/div. VOUT 20V/div. ILED 1A/div. Open LED Protection Open one LED string at working VSW 20V/div. VOUT 20V/div. VLED1 20V/div. ILED 1A/div. Short LED Protection Short a string at working Efficiency vs. Vin INPUT VOLTAGE (V) 80.0% 82.0% 84.0% 86.0% 88.0% 90.0% 92.0% 94.0% 96.0% 98.0% 100.0% 10 12 14 16 18 20 22 24 26 |
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