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Texas Instruments SLVP089 manual 8. Inductor and Output Ripple, Test Results, Hardware1-9, 2-AC

Models: SLVP089

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Test Results

Figure 1–8. Inductor and Output Ripple

	VCC = 12 V	Inductor
	IO = 1.5 A	Inductor
	IO = 1.5 A	Ripple
		Ripple
		1 A/Div
		1–DC
		Output
		Ripple
		20 mV/Div
		2–AC
		2 ∝ s/Div

Hardware1-9

Page 17

Image 17

Texas Instruments SLVP089 manual 8. Inductor and Output Ripple, Test Results, Hardware1-9, 2-AC

Contents

Mixed-Signal Linear Products ConSLVverterP089SynchronousEvaluationModuleBuckUser’s Guide 1998SLVU001A Printed in U.S.A07/98 Literature Number SLVU001A July SLVP089 Synchronous Buck Converter Evaluation Module User’s GuideIMPORTANT NOTICE Read This First How to Use This ManualAbout This Manual Related Documentation From Texas InstrumentsTrademarks If You Need AssistanceFCC Warning 1.1 Introduction 1.2 Schematic 1.3 Input/Output Connections Contents2.1 Introduction 2.2 Operating Specifications 2.3 Design Procedures 2.3.1 Duty Cycle Estimate 2.3.2 Output Filter 2.3.3 Power SwitchTables FiguresChapter HardwarePage TopicFigure 1-1. Typical Synchronous Buck Converter 1.1 IntroductionFigure 1-2. Schematic Diagram 1.2 SchematicHardware SchematicInput/Output Connections 1.3 Input/Output ConnectionsFigure 1-3. Input/Output Connections Figure 1-4. Board Layout 1.4 Board LayoutBoard Layout Hardware1-5Bill of Materials 1.5 Bill of MaterialsTable 1-1. Bill of Materials Table 1-2. Line/Load Regulation, 3.3-V Total Variation 1.6 Test ResultsTable 1-3. Load Regulation and Ripple, 3.3-V 9-V Input Figure 1-5. Efficiency Vs LoadFigure 1-7. Power Switch Turn-Off and Delay to Q2 On Figure 1-6. Power Switch Turn-On and Delay from Q2 OffTest Results V CC = 12Test Results Figure 1-8. Inductor and Output RippleHardware1-9 2-ACPage Chapter Design ProcedurePage Topic2.1 Introduction Table 2-1. Operating Specifications 2.2 Operating SpecificationsOperating Specifications Design Procedure2.3.3 Power Switch 2.3 Design Procedures2.3.1 Duty Cycle Estimate 2.3.2 Output Filter+ 3 W 2.3.4 Synchronous Switch and Rectifier2.3.5 Snubber Network 2.3.7 Loop Compensation 2.3.6 Controller Functions1 mA 0.001+ DD V O Figure 2-1. Power Stage Bode PlotFigure 2-2. Compensation Network Figure 2-4. Output Response Figure 2-3. Bode Plot

Figure 1–8. Inductor and Output Ripple

2–AC

Hardware1-9