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MC33063A 데이터시트(PDF) 7 Page - Texas Instruments |
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MC33063A 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 30 page − + Q S 1.25-V Reference Regulator R CT Ipk Oscillator Q2 Q1 Switch Collector 4 Switch Emitter Timing Capacitor GND 3 2 1 8 7 6 5 Comparator Inverting Input VCC Ipk Sense Drive Collector 100 W MC33063A, MC34063A www.ti.com SLLS636N – DECEMBER 2004 – REVISED JANUARY 2015 8 Detailed Description 8.1 Overview The MC33063A and MC34063A devices are easy-to-use ICs containing all the primary circuitry needed for building simple DC-DC converters. These devices primarily consist of an internal temperature-compensated reference, a comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current output switch. Thus, the devices require minimal external components to build converters in the boost, buck, and inverting topologies. The MC33063A device is characterized for operation from –40°C to 85°C, while the MC34063A device is characterized for operation from 0°C to 70°C. 8.2 Functional Block Diagram 8.3 Feature Description • Wide Input Voltage Range: 3 V to 40 V • High Output Switch Current: Up to 1.5 A • Adjustable Output Voltage • Oscillator Frequency Up to 100 kHz • Precision Internal Reference: 2% • Short-Circuit Current Limiting • Low Standby Current 8.4 Device Functional Modes 8.4.1 Standard operation Based on the application, the device can be configured in multiple different topologies. See the Application and Implementation section for how to configure the device in several different operating modes. Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: MC33063A MC34063A |
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