TPA0202 Audio Power Amplifier Evaluation Module User’s Guide May 1998 Mixed-Signal Products SLOU016
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Preface Related Documentation From Texas Instruments J J 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. TPA0202 STEREO 2-W AUDIO POWER AMPLIFIER (literature number SLOS205) This is the data sheet for the TPA0202 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.
Running Title—Attribute Reference Figures 1–1 2–1 2–2 2–3 3–1 3–2 3–3 3–4 3–5 3–6 3–7 3–8 3–9 3–10 The TI TPA0202 Audio Amplifier Evaluation Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Quick Start Platform Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Module Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction This chapter provides an overview of the Texas Instruments (TI) TPA0202 Audio Amplifier Evaluation Module (SLOP202). 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 TPA0202 Audio Amplifier Evaluation Module and the TI Plug-N-Play Audio Amplifier Evaluation Platform include the following features: - - TPA0202 Stereo 2-W Audio Power Amplifier Evaluation Module J J J J J J J J J J J J - 1-2 Dual channel, bridge-tied load (BTL) or single-ended operation 3.3-V and 5-V operation 2 W per channel output power into 3 Ω at 5 V, BTL 850 mW per channel output power into 3 Ω at 3.
Description 1.2 Description The TPA0202 Stereo 2-W Audio Power Amplifier Evaluation Module is a complete, 2-Watt per channel stereo audio power amplifier. It consists of the TI TPA0202 Stereo 2-W Audio Power Amplifier IC along with a small number of other parts mounted on a circuit board that measures approximately 2¼ inches by 1½ inches (Figure 1–1). Figure 1–1. The TI TPA0202 Audio Amplifier Evaluation Module RHP C7 GND RIN C6 RVDD R10 R8 S5 S6 S3 C8 R9 GND R7 C9 C10 TPA0202 SAMPLE EVM Lit.
TPA0202 EVM Specifications 1.3 TPA0202 EVM Specifications Supply voltage range, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 V to 5.5 V Supply current, IDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A max Continuous output power per channel, PO: 4-Ω BTL, VDD = 5 V . . . . . . . . . . . . . . . . . . . . . . 2 W 4-Ω BTL, VDD = 3.3 V . . . . . . . . . . . . . . . .
Chapter 2 Quick Start The steps in this chapter can be followed to quickly prepare the TPA0202 audio amplifier EVM for use. Using the TPA0202 with the TI Plug-N-Play Audio Amplifier 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 on-board 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 TPA0202 EVM with the TI Plug-N-Play Audio Amplifier Evaluation Platform (see the platform user’s guide, SLOU011, for additional details). Numbered callouts for selected steps are shown in Figure 2–1 and Figure 2–2, and details appear in Chapter 3. - 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 Platform - Evaluation Module Preparations Figure 2–2. Module Preparation 14 RHP C7 GND RIN C6 RVDD R10 R8 S5 S6 S3 C8 R9 GND R7 C9 C10 TPA0202 SAMPLE EVM Lit.
Quick Start List for Stand-Alone 2.3 Quick Start List for Stand-Alone Follow these steps to use the TPA0202 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the TPA0202 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 2–3 and details appear in Chapter 3. Figure 2–3.
Quick Start List for Stand-Alone - Evaluation Module Preparations 6) To have the module amplifier IC enter the shutdown mode when the module mute control input is activated, set shutdown jumper S1 to ON. To have the amplifier IC only mute when the module mute control input is activated, set shutdown jumper S1 to OFF. 7) To select the line inputs, set input select jumper S3 to OFF. To select the headphone inputs, set input select jumper S3 to ON.
Chapter 3 Details This chapter provides details on the TPA0202 IC, the evaluation module, and the steps in the Quick-Start List, additional application information, and a parts list for the TPA0202 evaluation module. Topic Page 3.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2 3.2 The TPA0202 Audio Power Amplifier Evaluation Module . . . . . . . . . 3–3 3.3 Using the TPA0202 EVM With the Plug-N-Play Evaluation Platform . . . . .
Precautions 3.1 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 on-board soldered-in fuses and cause other damage to the platform, installed evaluation modules, and/or the power source.
The TPA0202 Audio Power Amplifier Evaluation Module 3.2 The TPA0202 Audio Power Amplifier Evaluation Module The TPA0202 Audio Power Amplifier Evaluation Module is powered by a TPA0202 stereo power amplifier capable of delivering greater than 2 W of continuous power per channel into 3-Ω loads. The amplifier IC can be operated in either the BTL or single-ended output mode.
The TPA0202 Audio Power Amplifier Evaluation Module Figure 3–3. TPA0202 EVM Schematic Diagram S8 1 GND/HS LOUT+ 2 C3 5 pF 3 C1 1 µF R1 20 kΩ R2 50 kΩ 4 LIN R4 20 kΩ LHP R3 20 kΩ C2 1 µF LVDD 6 C4 2.2 µF 7 C5 2.
The TPA0202 Audio Power Amplifier Evaluation Module Figure 3–4. TPA0202 Amplifier IC MUX MUX MUX SE/BTL The IC includes two separate amplifier channels, each of which can operate in either the bridged-tied load (BTL) mode or the single-ended mode as selected by the SE/BTL pin. In the BTL mode, the two output lines of each channel operate 180° out-of-phase with each other for increased power. The speaker load is connected directly across OUT+ and OUT–, and neither line is connected to ground.
The TPA0202 Audio Power Amplifier Evaluation Module 3.2.4 SIngle-Ended Operation For single-ended operation, the module SE/BTL control input pin must be held high. The speaker (or headphone) load is connected to the module OUT+ output pin through a coupling capacitor, and to platform/system ground.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3 Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform The TPA0202 Audio Amplifier Evaluation Module was designed to be used with the TI Plug-N-Play Audio Amplifier Evaluation Platform. It simply plugs into socket U2. The following paragraphs provide additional details for using the TPA0202 EVM with the platform. 3.3.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3.2 TPA0202 Module Jumper Settings and Switches The TPA0202 EVM is equipped with several pushbutton SPST switches and jumpers that act as SPST switches to allow module operation to be modified to suit various requirements. In the following discussion, setting a jumper to ON means that a shunt is installed across the two pins of the jumper. Setting a jumper to OFF means that no shunt is installed on the jumper. See Figure 3.5.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3.2.1 S1 — Shutdown Jumper To have the module amplifier IC enter the shutdown mode when the module mute control input is activated, set shutdown jumper S1 to ON. The mute control output pin on the TPA0202 amplifier IC follows the mute control input pin and is buffered.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3.2.5 S5 — VDD Bridge Jumper Jumper S5 connects the module LVDD power supply line to the RVDD power supply line. When the TPA0202 EVM is plugged into the platform, both VDD supplies are sourced from the same platform power bus, so the state of jumper S5 is irrelevant.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3.3 Signal Routing Signal flow on the platform is controlled by two signal routing switches, as shown in Figure 3 – 5. Figure 3–6. Platform Signal Routing and Outputs Off + Audio Input R R R U1 Signal Conditioning S2 – U2 TPA0202 Amplifier EVM – L L L J7, J8, J9 Speaker Outputs + On U2 – U4 R U5 Stereo Headphone Amplifier R S3 + – J10 Headphone Output – GND L L + U5 3.3.3.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3.4 Mute/Mode The TPA0202 EVM is equipped with a mute control input pin. When this input is tied to VDD, the TPA0202 amplifier IC on the module enters the mute mode and dissipates very little power. When the EVM control input is tied to GND or allowed to float, amplifier operation resumes.
Using The TPA0202 EVM With the Plug-N-Play Evaluation Platform 3.3.4.2 Mute/Mode Select (JP6) A 3-pin jumper header (JP6) on the platform, functioning as an SPDT switch, routes the control signal from the headphone jack to either the mute control input pin or the mode control input pin of the evaluation module. J J 3.3.4.
Power Requirements 3.3.5 Power Requirements The TPA0202 Audio Power Amplifier Evaluation Module can operate from any voltage between approximately 3 V and 5.5 V; however, the TPA0202 amplifier IC on the module is characterized for operation at 3.3 V and 5 V. For best performance (highest output power with lowest distortion), the module should be operated at approximately 5 V unless there is a specific reason for operating it from a lower voltage.
Inputs and Outputs 3.3.6 Inputs and Outputs The TI Plug-N-Play Audio Amplifier Evaluation Platform is equipped with several standard conectors for audio inputs and outputs. 3.3.6.1 Inputs In most cases, audio signals enter the platform through either a pair of RCA phono jacks (J3 and J5) or a miniature (1/8″) stereo phone jack (J4). Certain signal conditioning and amplifier EVMs, however, may have additional signal input connectors mounted on the module circuit board.
Using The TPA0202 EVM Stand-Alone 3.4 Using The TPA0202 EVM Stand-Alone Using the TPA0202 Audio Power Amplifier Evaluation Module stand-alone is much the same as using it with the platform. The same 3-V to 5.5-V power supply range and the isolated OUT+ and OUT– lines for BTL operation requirement exists. Note that the mute signal applied to the EVM mute pin must be able to supply enough current to overcome the pulldown resistor on the module (100 kΩ). 3.4.
Using The TPA0202 EVM Stand-Alone 3.4.2 TPA0202 EVM Connected for Single-Ended Output Figure 3–10. TPA0202 EVM Connected for Stereo Single-Ended Output 5V Audio Input (Right) C7 RHP S5 S6 S3 C8 R9 GND R7 C9 C10 TPA0202 SAMPLE EVM Lit.
TPA0202 Audio Power Amplifier Evaluation Module Parts List 3.5 TPA0202 Audio Power Amplifier Evaluation Module Parts List Table 3–1. TPA0202 EVM Parts List Ref. Description Size EVM Qty. Manufacturer/ Part Number Digi-Key Number C1, C2, C6, C7 Capacitor, 1 µF, 80%/–20%, nonpolarized 1206 4 Murata GRM42-6Y5V105Z16BL C4, C5, C9, C10 Capacitor, 2.
