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SS24 데이터시트(PDF) 1 Page - Monolithic Power Systems |
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1 / 11 page MP1591 2A, 32V, 330KHz Step-Down Converter MP1591 Rev. 2.3 www.MonolithicPower.com 1 9/27/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. The Future of Analog IC Technology DESCRIPTION The MP1591 is a high voltage step-down converter ideal for automotive power adapter battery chargers. Its wide 6.5V to 32V input voltage range covers the automotive battery’s requirements and it achieves 2A continuous output for quick charge capability. Current mode operation provides fast transient response and eases loop stabilization. Fault protection includes cycle-by-cycle current limiting and thermal shutdown. In shutdown mode, the converter draws only 20µA of supply current. The MP1591 requires a minimum number of readily available external components to complete a 2A step-down DC to DC converter solution. EVALUATION BOARD REFERENCE Board Number Dimensions EV0020 2.1”X x 1.4”Y x 0.5”Z FEATURES • Wide 6.5V to 32V Input Operating Range • 34V Absolute Maximum Input • 2A Output Current • 120mΩ Internal Power MOSFET Switch • Stable with Low ESR Output Ceramic Capacitors • Up to 95% Efficiency • 20µA Shutdown Mode • Fixed 330KHz Frequency • Thermal Shutdown • Cycle-by-Cycle Over Current Protection • Output Adjustable From 1.23V to 21V • Under Voltage Lockout • Reference Voltage Output • Available in 8-Pin SOIC Packages APPLICATIONS • Automotive Power Adapters • PDA and Cellular Phone Battery Chargers • Distributed Power Systems • Automotive Aftermarket Electronics “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION INPUT 6.5V to 32V OPEN NOT USED OUTPUT 2.5V 2A C4 4.7nF D1 C2 10nF MP1591 BS IN FB SW REF GND COMP EN 1 3 5 6 4 8 7 2 C3 OPEN OFF ON 100 90 80 70 60 50 40 30 20 0 0.5 1 1.5 2 LOAD CURRENT (A) Efficiency vs Load Current VOUT=5V VOUT=3.3V VIN=12V |
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