User’s Guide December 2000 Mixed-Signal Products SLOU098
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. TPA0233 2-W Mono Audio Power Amplifier With Headphone Drive (literature number SLOS278) This is the data sheet for the TPA0233 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.
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Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA0233 audio amplifier evaluation module (SLOP268). 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 TPA0233 audio amplifier evaluation module and the TI plug-n-play audio amplifier evaluation platform include the following features: TPA0233 mono 2-W audio power amplifier with stereo headphone drive evaluation module Single channel, bridge-tied load (BTL) or dual-channel single-ended operation Internal summing of left and right channels to generate mono signal 2 W output power into 4 Ω at 5 V, BTL 0.
Description 1.2 Description The TPA0233 audio power amplifier evaluation module is a complete 2-watt mono audio power amplifier with stereo headphone drive. It consists of the TI TPA0233 mono 2-W audio power amplifier IC along with a small number of other parts mounted on a circuit board that measures approximately 2 1/4 inches by 1 1/2 inches (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 TPA0233 audio amplifier EVM, or to connect the TPA0233 audio amplifier EVM for stand-alone operation. Using the TPA0233 audio amplifier evaluation module 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.
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.
2.2 Quick Start List for Platform Follow these steps when using the TPA0233 EVM with the TI plug-n-play audio amplifier evaluation platform (see the platform user’s guide, SLOU011, for additional details). Table 2–1 shows typical platform jumper and switch settings and numbered callouts for selected steps appear in Figure 2–1. Table 2–1.
2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA0233 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA0233 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 appear in Figure 2–2. Figure 2–2.
2.4 Stand-Alone Connection Diagrams The power supply range is 2.5 V to 5.5 V and isolated RO/MO+ and LO/MO– 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 (100 kΩ) when the pin is held low. 2.4.1 TPA0233 EVMs Connected for Stereo BTL Output Figure 2–3 shows two TPA0233 EVMs connected for stereo BTL operation. Figure 2–3.
2.4.2 TPA0233 EVM Connected for Single-Ended Stereo Headphone Output Figure 2–4 shows a TPA0233 EVM connected for single-ended stereo headphone operation. Figure 2–4.
2.5 Reference This section includes the TPA0233 EVM schematic, the EVM parts list, and the module PCB layers. 2.5.1 EVM Schematic Figure 2–5 shows the TPA0233 EVM schematic. Figure 2–5. TPA0233 EVM Schematic Diagram R2 50 kΩ C2 0.47 µF R3 12 kΩ LIN SHUT DOWN C1 1 µF 1 FILT_CAP LO/MO 2 LIN SD S1 C6 0.47 µF R1 NO 100 kΩ R4 50 kΩ VDD C3 10 µF 3 4 5 R5 12 kΩ RIN GND TPA0233 C4 1 µF VDD GND BYPASS ST/M RIN RO/MO C5 0.
2.5.2 EVM Parts List Table 2–2 is the TPA0233 EVM parts list. Table 2–2. TPA0233 EVM Parts List Ref. Description Size EVM Qty. Manufacturer/ Part Number Vendor Number C1, C4 Capacitor, 1 µF @ 16 V, +80%/–20%, nonpolarized 1206 2 Murata GRM42-6Y5V105Z16BL Arrow GRM426Y5V105Z 016 C2, C5, C6 Capacitor, 0.47 µF @ 16 V +80%/–20%, nonpolarized 0805 3 Murata GRM40-Y5V474Z16 Arrow GRM40Y5V474Z 016 C3 Capacitor, 10 µF @ 6.
2.5.3 Module PCB Layers The following illustrations depict the TPA0233 EVM PCB layers and silkscreen. These drawings are not to scale. Gerber plots can be obtained from any TI Sales Office. Figure 2–6. TPA0233 EVM PCB Figure 2–7.
Figure 2–8.
