TPA751 MSOP Audio Power Amplifier Evaluation Module User’s Guide February 2001 Mixed-Signal Products SLOU112
IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.
Preface Related Documentation From Texas Instruments TI Plug-N-Play Audio Amplifier Evaluation Platform (literature number SLOU011) provides detailed information on the evaluation platform and its use with TI audio evaluation modules. TPA751 700-mW Low-Voltage Audio Power Amplifier (literature number SLOS336) This is the data sheet for the TPA751 audio amplifier integrated circuit. FCC Warning This equipment is intended for use in a laboratory test environment only.
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Running Title—Attribute Reference Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 TPA751 EVM Specifications .
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Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA751 MSOP Audio Power Amplifier Evaluation Module (SLOP357). It includes a list of EVM features, a brief description of the module illustrated with a pictorial diagram, and a list of EVM specifications. Topic Page 1.1 Feature Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feature Highlights 1.1 Feature Highlights The TI TPA751 MSOP Audio Power Amplifier Evaluation Module and the TI Plug-n-Play Audio Amplifier Evaluation Platform include the following features: TPA751 low-voltage audio power amplifier evaluation module Single-channel, bridge-tied load (BTL) 2.5-V and 5.
Description 1.2 Description The TPA751 MSOP Audio Power Amplifier Evaluation Module is a complete, low-power single-channel audio power amplifier. It consists of the TI TPA751 700-mW low-voltage audio power amplifier IC in a very small MSOP package, along with a small number of other parts mounted on a circuit board that is approximately one and a quarter inches square (see Figure 1–1). Figure 1–1.
1-4 Introduction
Chapter 2 Operation Quick start lists in this chapter contain steps that can be followed to quickly prepare the TI plug-n-play audio amplifier evaluation platform for use with the TPA751 MSOP Audio Power Amplifier Evaluation Module, or to connect the TPA751 EVM for stand-alone operation. Using the TPA751 EVM with the TI evaluation platform is a quick and easy way to connect power, signal and control inputs, and signal outputs to the EVM, using standard connectors.
Precautions 2.1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to VCC power input connector J1, J2, and/or VDD power input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in fuses and cause other damage to the platform, installed evaluation modules, and/or the power source.
Quick Start List for Platform 2.2 Quick Start List for Platform Follow these steps when using the TPA751 EVM with the TI Plug-N-Play Audio Amplifier Evaluation Platform (see the platform user’s guide, SLOU011, for additional details). Typical EVM settings are shown in Table 2–1. Numbered callouts for selected steps are shown in Figure 2–1. Platform preparations 1) Ensure that all external power sources are set to off and that the platform power switch S1 is set to off.
Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA751 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA751 module header pins can be made via individual sockets, wire-wrapping, or soldering to the pins, either on the top or the bottom of the module circuit board. Numbered callouts for selected steps are shown in Figure 2–2. Figure 2–2.
Stand-Alone Connection Diagram 2.4 Stand-Alone Connection Diagram The power supply range is 2.5 V to 5.5 V and isolated OUT+ and OUT– lines for BTL operation are required. Note that the source of any shutdown signal applied to the EVM SHUTDOWN pin must be able to sink the current flowing through the pullup resistor on the module (20 kΩ) when the pin is held low. Figure 2–3 shows a TPA751 EVM connected for stereo BTL operation. Figure 2–3.
Reference 2.5 Reference This section includes the TPA751 EVM schematic, the EVM parts list, and the module PCB layers. 2.5.1 TPA751 EVM Schematic Diagram Figure 2–4 shows the TPA751 EVM schematic. Figure 2–4. TPA751 EVM Schematic Diagram R1 20 kΩ 1 Shutdown 2 NO S1 C1 C2 1 µF 1 µF IN+ C3 1 µF R3 20 kΩ IN– R4 20 kΩ 2-6 R2 39 kΩ 3 4 Shutdown VO– Bypass GND In+ In– VDD TIATC VO+ TPA751 VDD 2.5 V to 5.
Reference 2.5.2 TPA751 MSOP Audio Power Amplifier Evaluation Module Parts List Table 2–2 shows the TPA751 EVM parts list. Table 2–2. TPA751 EVM Parts List Reference † Description Size EVM Qty. Manufacturer/ Part Number Vendor Number A 1 Panasonic ECS-TOJY106R Digi-Key PCS1106CT-ND C4 Capacitor, 10 µF, 6.
TPA751 EVM PCB Layers 2.5.3 TPA751 EVM PCB Layers The following illustrations depict the TPA751 EVM PCB layers and silkscreen. These drawings are not to scale. Gerber plots can be obtained from any TI sales office. Figure 2–5. TPA751 EVM PCB Figure 2–6.
IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.
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