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APW7047 데이터시트 - Anpec Electronics

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APW7047 Dual Advanced PWM and Source-Sink Linear Controller Anpec
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APW7047 데이타시트 PDF : APW7047 pdf   
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General Description
The APW7047 provides the power controls and protections for three output voltages on AGP/PCI Graphic Card applications. It integrates two PWM controllers , one SOURCE-SINK linear controller, as well as the monitor and protection functions into a single package. One PWM converter (PWM1) regulates the VCORE(1.5V) for the GPU with a SYNC. buck converter. The other standard buck converter (PWM2) regulates the VMEM(2.5V) for the power of DDR memory. The SOURCE-SINK linear controller control two external MOSFETs to be a linear regulator with the capability of sourcing and sinking current. It regulates the VTT (1.25V) power for DDR Termination voltage.

Features
• 3 Regulated Voltages are provided
    − SYNC. Buck Converter for VCORE (1.15V~1.50V)
    − Standard Buck Converter for VMEM (2.40V~2.75V)
    − Linear Controller with SOURCE-SINK Regulation for VTT(1.25V)
• Simple Single-Loop Control Design
    − Voltage-Mode PWM Control
• Excellent Output Voltage Regulation
    − VCORE Output : ±2% Over Temperature
    − VMEM Output : ±2% Over Temperature
    − VTT Output : 1/2 VIN ±25mV Over Temperature Min. VIN = 1.7V
• Fast Transient Response
    − Built-in Feedback Compensation
    − Full 0% to 100% Duty Ratio
• Over-Voltage and Over-Current Fault Monitor
• Constant Frequency Operation(200kHz)
• 24 pins, SOIC Package

Applications
• M/B DDR Power Regulation
• AGP/PCI Graphics Power Regulation
• SSTL-2 Termination

 

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