Manuals / Texas Instruments / Home Audio / Stereo Amplifier

Texas Instruments APA100 manual 7. TPA2001D1 Block Diagram, TPA2001D1 Class-DModulator, t − Time

Models: APA100

1 42

Download 42 pages 18.78 Kb

Page 30

Figure 4−7. TPA2001D1 Block Diagram

TPA2001D1 (Class-D Modulator)

Figure 4−7. TPA2001D1 Block Diagram

		VDD	AGND
		VDD
	Pre-Amp			Integrator		Comparator
	Gain			_	Cint2	+	Deglitch	Gate
INN	Gain			_		_	Deglitch	Gate
INN	Adj.		Rs2			_	Logic	Drive
			Rs2	+
				+
		_	+
			+
		cmv
		+
				+
	Gain			_
INP	Adj.		Rs1			+	Deglitch	Gate
						+
						_
						_	Logic	Drive
					Cint1
SDZ	SDZ						Startup	OC
SDZ	TTL						Protection	OC
	TTL						Protection	Detect
	Input						Logic	Detect
GAIN1	Input		Biases				Logic
GAIN1	Buffers			Ramp
	Buffers
			and
GAIN0			and	Generators
GAIN0	Gain	2	References	Generators
	Gain	2
							Thermal	VDDok
COSC
ROSC
BYPASS

PVDD

OUTN

PGND

PVDD

OUTP

PGND

Figure 4−8 shows the output PWM signal and the input signal of the TPA2001D1.

Figure 4−8. TPA2001D1 Inputs and Outputs With 20−kHz Sine Wave

VOUT+
CH1
VOUT−
CH2
VOUT
Differential
CH3
VIN
CH4
Ch1: 3V/Div Ch2: 3V/Div Ch3: 3V/Div Ch4: 1V/Div
t − Time − 5	ms

4-8

Image 30

Texas Instruments APA100 manual 7. TPA2001D1 Block Diagram, TPA2001D1 Class-DModulator, t − Time, Differential

Contents

APA100 Audio Power AmplifiersUser’s Guide AugustIMPORTANT NOTICE ProductsApplications About This Manual How to Use This ManualRead This First Information About Cautions and WarningsData Sheets Related Documentation From Texas InstrumentsFCC Warning This is an example of a warning statementContents Figures TablesPage EVM OverviewChapter Topic1.1 Features 1.2 Power Requirements1.2.1Supply Voltage 1.3 EVM Basic Function/Block Diagram EVM Basic Function/Block DiagramEVM Overview Integrator EVM Basic Function/Block DiagramFeedback TLV2464Chapter PCB DesignSchematic Page2.1 PCB Layout 2.1.1Split Ground Plane2.1.2H-BridgeLayout 2.1.3Analog Section LayoutFigure 2−2. APA100 Split Plane Bottom Layout 2.1.4PCB Layers Figure 2−3. Top Copper and SilkscreenPCB Layout Figure 2−4. Bottom Copper and SilkscreenFigure 2−5. Drill Drawing PCB Design2.2 Bill of Materials Table 2−1. Parts ListBill of Materials 2.3 Schematic SchematicPCB Design Page Page EVM OperationChapter Topic3.1 Quick Start Figure 3−1. Quick Start Module Map3.4 Error Signals 3.2 Power−Up/Down Sequence3.3 Reset Button/Mute Table 3−1. TAS5111 Error Decoding3.5 Changing the Gain Page Technical InformationChapter Topic4.1 Feedback System Design Figure 4−1. APA100 Block DiagramPhase Margin + 180 Phase at Fc Figure 4−4. APA100 Integrator Design Closed−loop gain + 1.5 0 C10 V1 1 0 4.2 TPA2001D1 Class-DModulator Ch1: 3V/Div Ch2: 3V/Div Ch3: 3V/Div Ch4: 1V/Div Figure 4−7. TPA2001D1 Block DiagramTPA2001D1 Class-DModulator t − Time −4.4 TLV2464A Gain Setting and Feedback 4.3 TAS5111 H-Bridge4.5 LC Filter Figure 4−9. APA100 Output Filter4.6 Thermal Table 4−1. TAS5111 Thermal TableAs an indication of the importance of keeping the thermal grease layer thin, if the thermal grease layer increases to 0.002 inch thick, the required heatsink thermal resistance changes to 2.4C/W Page Measured ResultsChapter Topic5.1 Total Harmonic Distortion + Noise Total Harmonic Distortion + NoiseTotal Harmonic Distortion + Noise Measured Results5.2 Output Power Output Power5.3 Efficiency EfficiencyMeasured Results 5.4 Gain and Phase Response 5.5 Signal-to-NoiseRatio SNRGain and Phase Response 5.6 Supply Ripple Rejection Supply Ripple RejectionMeasured Results