Texas Instruments TPA2017D2 Manuals

1 Introduction 1.1 Description 1.2 TPA2017D2EVM Specifications User's Guide SLOU234–April 2009 TPA2017D2 Audio Power Amplifier EVM Contents 1 Introduction ................................................................................................................... 1 2 Operation ..................................................................................................................... 2 3 Schematic and Bill of Materials ............................................................................................ 3 List of Figures 1 EVM Schematic.............................................................................................................. 3 2 Top Side Layout.............................................................................................................. 4 3 Bottom Side Layout.......................................................................................................... 4 List of Tables 1 Gain Settings................................................................................................................. 2 The TPA2017D2 is a stereo, filter-free Class-D audio power amplifier with automatic gain control (AGC), dynamic range compression (DRC). The AGC and DRC functions enhance the perceived audio loudness, and at the same time prevent speaker damage from overdrive. Availability in the QFN package makes TPA2017D2 an ideal choice for laptop and portable applications. The TPA2017D2 evaluation module (EVM) is a complete, stand-alone audio board. It contains the TPA2017D2 QFN (RTJ) Class-D audio power amplifier. The TPA2017D2 evaluation module (EVM) is a complete stand-alone audio board. All components are Pb-free. Supply voltage range, VDD 4.5 V to 5.5 V Supply current, IDD 1 A, maximum Speaker amplifier output power per channel, PO: 4Ω, VDD = 5 V, THD+N = 1% 2 W SLOU234–April 2009 TPA2017D2 Audio Power Amplifier EVM 1 Submit Documentation Feedback 2 Operation 2.1 Quick-Start List for Stand-Alone Operation 2.1.1 Speaker Amplifier 2.1.2 Power Supply 2.1.3 Evaluation Module Preparations 2.1.4 Power Up Operation www.ti.com Follow these steps to use the TPA2017D2EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the EVM can be made by inserting stripped wire or using banana plugs for the power supply and output connections. The inputs accept standard RCA plugs. 1. Ensure that all external power sources are set to OFF. 2. Connect an external regulated power supply adjusted to 5 V to the module VDD and GND banana jacks, taking care to observe marked polarity. Inputs and Outputs 1. If connecting to a fully differential input or a grounded input (the shield of the RCA is GND), remove jumpers JP1 and JP2 from the EVM. If connecting to a floating source like a portable CD, install jumpers JP1 and JP2. After setting the JP1 and JP2 jumpers appropriately, connect the input source to the speaker left and right inputs (INL and INR) . 2. Connect a speaker across OUTR+ and OUTR-. Connect another speaker across OUTL+ and OUTL-. Control Inputs 1. Enable: Hold down switch EN to place the amplifier in shutdown. Release EN to reactivate the amplifier. 2. AGC1/AGC2: Together, these terminals determine the AGC setting of the amplifier. See Table 1. Installing the jumpers in position 0 sets the respective terminal to GND. Installing the jumpers in position 1 sets the respective terminals to VDD. Table 1. Gain Settings AGC1 AGC2 Function 0 0 AGC Function disabled 0 1 AGC Limiter Function enabled AGC, Limiter, and Compression Functions 1 0 enabled AGC, Limiter, Compression, and Noise Gate 1 1 Functions enabled 1. Verify correct voltage and input polarity, and turn on the external power supplies. The EVM should begin operation. 2. Adjust the input signal. 3. Adjust the control inputs to the desired settings. 4. Adjust the amplifier AGC setting by installing/removing the jumpers, AGC1 and AGC2. List of Tables 2 SLOU234–April 2009 Submit Documentation Feedback 3 Schematic and Bill of Materials 3.1 TPA2017D2EVM Schematic Red VDD Black GND Vdd Vdd Vdd Vdd Vdd Vdd Vdd Vdd QFN20-RTJ 5 6 11 20 U1 TPA2017D2RTJ 7 8 9 10 15 14 13 12 19 18 17 16 4 3 2 1 PowerPad 1 2 EN 1 2 3 RCA (Black) INL 1 2 3 INR RCA (Red) 1 2 JP1 JP2 2 1 0603 100 R1 R2 100 0603 0603 100 R3 R4 100 0603 0603 .047ufd/25V C2 C3 .047ufd/25V 0603 0603 .047ufd/25V C4 C5 .047ufd/25V 0603 0603 1.0ufd/10V C6 C7 1.0ufd/10V 0603 0603 1.0ufd/10V C8 C9 1.0ufd/10V 0603 C13 1.0ufd/10V 0603 0603 1.0ufd/10V C15 0603 100K R5 0603 0.1ufd/25V C10 C11 0.1ufd/25V 0603 0603 0.1ufd/25V C12 C14 0.1ufd/25V 0603 1 2 3 AGC1 1 2 3 AGC2 1206 10ufd/16V C1 0.875" 0.875" 0.875" 0.875" 1 2 J3 J1 2 1 1 2 J2 0805 100ohms/4A 1 2 L1 L2 2 1 100ohms/4A 0805 0805 100ohms/4A 1 2 L3 L4 2 1 100ohms/4A 0805 0603 1000pfd/50V C16 C17 1000pfd/50V 0603 0603 1000pfd/50V C18 C19 1000pfd/50V 0603 0603 1.00K R6 R7 1.00K 0603 0603 1.00K R8 R9 1.00K 0603 0603 4700pfd/50V C20 C21 4700pfd/50V 0603 0603 4700pfd/50V C22 C23 4700pfd/50V 0603 White TP1 TP2 White White TP3 TP4 White OUTR+ OUTR- OUTL- OUTL+ Black Black GND ONLY TESTING EMI FOR J1/J2/J3 BOM ONLY GND INPUT FILTER STANDOFFS SHUNTS JP1 JP2 AGC1 AGC2 www.ti.com Schematic and Bill of Materials Figure 1. EVM Schematic SLOU234–April 2009 List of Tables 3 Submit Documentation Feedback