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MP3391 Datasheet(PDF) 4 Page - Monolithic Power Systems |
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MP3391 Datasheet(HTML) 4 Page - Monolithic Power Systems |
4 / 18 page MP3391—8-CHANNEL, 120mA/CH STEP-UP WLED DRIVER CONTROLLER MP3391 Rev. 1.11 www.MonolithicPower.com 4 3/14/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. ELECTRICAL CHARACTERISTICS VIN =18V, VEN = 5V, TA = +25°C, unless otherwise noted. Parameters Symbol Condition Min Typ Max Units Operating Input Voltage VIN 9 35 V Supply Current (Quiescent) IQ VIN=18V, VEN=5V, no load no switching, RISET=20kΩ 3.5 mA Supply Current (Shutdown) IST VEN=0V, VIN=18V 2 μA VCC Output Voltage VCC VEN=5V, 6V<VIN<35V, 0<IVCC<10mA 4.5 5 5.5 V VCC UVLO Threshold VCC_UVLO Rising Edge 3.4 3.9 4.3 V VCC UVLO Hysteresis 200 mV VDD Output Voltage VDD VEN=5V, 12V<VIN<35V, 0<IVDD<15mA 9 10 11 V VDD UVLO Threshold VCC_UVLO Rising Edge 6.8 7.3 7.8 V VDD UVLO Hysteresis 500 mV EN High Voltage VEN_HIGH VEN Rising 1.6 V EN Low Voltage VEN_LOW VEN Falling 0.8 V NUMSEL High Threshold VNUMSEL_HI Rising, 6 strings 3 V NUMSEL Low Threshold VNUMSEL_LO Falling, 4 strings 0.8 V STEP-UP CONVERTER Gate Driver Impedance (Sourcing) RGH VDD=10V,IGATE=10mA 4.5 Ω Gate Driver Impedance (Sinking) RGL VDD=10V,IGATE=-10mA 1.5 Ω Gate Maximum Source Current ISOURCE 0.4 A Gate Maximum Sink Current ISINK 1 A Switching Frequency fSW ROSC= 50kΩ 235 280 325 kHz OSC Voltage VOSC 1.20 1.23 1.26 V Minimum On Time TON_MIN PWM Mode, when no pulse skipping happens 200 ns Maximum Duty Cycle DMAX 90 % ISENSE Limit 90% Duty Cycle 175 230 285 mV COMP Source Current Limit ICOMP SOLI 200 μA COMP Sink Current Limit ICOMP SILI 50 μA PWM DIMMING DBRT Leakage Current IDBRT_LK -5 +5 μA BOSC Frequency FBOSC CBOSC=2.2nF 1.2 1.6 2 kHz BOSC Output Current IBOSC 5.7 7.0 7.9 μA |
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