- TEXAS AUDIO POWER AMPLIFIER USER'S GUIDE TPA2012D2

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1 Introduction

1.1 TPA2012D2 EVM Specifications

User's Guide

SLOU174A – February 2005 – Revised April 2005

TPA2012D2 Audio Power Amplifier Evaluation Module

The TPA2012D2 audio power amplifier evaluation module is a complete, low-power,

Class-D, stereo audio power amplifier capable of delivering 1.2 W/channel (YZH

package). All components and the evaluation module are Pb-Free.

Contents

1 Introduction .......................................................................................... 1

2 Operation ............................................................................................ 2

3 Reference ............................................................................................ 3

4 Related Documentation From Texas Instruments .............................................. 6

List of Figures

1 TPA2012D2 Output Power ........................................................................ 2

2 Top Layer ............................................................................................ 4

3 Bottom Layer ........................................................................................ 4

4 TPA2012D2 EVM Schematic Diagram .......................................................... 5

List of Tables

1 Gain Settings ........................................................................................ 3

2 TPA2012D2 EVM Parts List ....................................................................... 6

This section provides an overview of the Texas Instruments (TI) TPA2012D2 NanoFree™ WCSP audio

amplifier evaluation module (TPA2012D2 EVM). It includes a brief description of the module and a list of

EVM specifications.

Supply voltage range, V

2.5 V to 5.5 V

Power supply current rating required 2.5 A

Continuous output power, P

: 4- Ω BTL, V

= 5 V 1.2 W (see note)

Audio input voltage, V

0 V to V

Minimum load impedance, Z

4 Ω

Note:

The TPA2012D2 in the RTJ package (QFN) is rated at 2.1 W/channel. The YZH package

(WCSP) is thermally limited to 1.2 W/channel on the EVM. For layouts with higher trace

density and additional copper, the maximum output power will be larger. See the data

sheet for device descriptions.

NanoFree is a trademark of Texas Instruments.

TPA2012D2 Audio Power Amplifier Evaluation ModuleSLOU174A – February 2005 – Revised April 2005 1

Summary of content (8 pages)

PAGE 1
User's Guide SLOU174A – February 2005 – Revised April 2005 TPA2012D2 Audio Power Amplifier Evaluation Module The TPA2012D2 audio power amplifier evaluation module is a complete, low-power, Class-D, stereo audio power amplifier capable of delivering 1.2 W/channel (YZH package). All components and the evaluation module are Pb-Free. Contents Introduction .......................................................................................... Operation .......................................................
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www.ti.com Operation 2.50 PO − Output Power − W See Note VDD = 2.5 V, 1% 2 VDD = 2.5 V, 10% VDD = 3.6 V, 1% 1.50 VDD = 3.6 V, 10% VDD = 5 V, 1% VDD = 3.6 V, 10% 1 0.50 0 4 9 14 19 24 29 34 RL − Load Resistance − Figure 1. TPA2012D2 Output Power Note: The dashed portion of the curve indicates the region where the TPA2012D2YZH (WCSP) is thermally limited. Output power in this region will depend on the heat dissipation provided by the circuit board.
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www.ti.com Reference Table 1. Gain Settings Amplifier Gain Setting (typ) (1) GAIN1 (1) GAIN0 (1) V/V 0 0 2 6 0 1 4 12 1 0 8 18 1 1 16 24 dB 0 = Jumper installed, 1 = Jumper not installed 2.1.2.3 Shutdown Controls 1. The TPA2012D2 provides independent shutdown controls so that each channel can be controlled separately. The shutdown pins, SDL and SDR, are active low. This means that a low voltage (ground) on this pin places the appropriate channel in shutdown mode.
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www.ti.com Reference 3.1 TPA2012D2 EVM PCB Layers Figure 2. Top Layer Figure 3.
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www.ti.com Reference 3.2 TPA2012D2 EVM Schematic Diagram VDD VDD R4 120 k VDD R3 120 k GAIN1 C12 10 F GAIN0 C9 10 F (Not Populated) VDD VDD 1 F C7 1 F C8 1 F G0 PVDD C6 L4 INL+ OUTL+ INL− OUTL− INR− OUTR− INR+ OUTR+ PGND 1 F SDR INR− C5 AGND INL− AVDD G1 U1 SDL INL+ C11 0.1 F C10 1 F OUTL+ C4 1 nF L3 OUTL− INR+ C3 1 nF VDD R1 120 k L2 OUTR− SDR C2 1 nF VDD SDR JP1 R2 120 k L1 OUTR+ SDL C1 1 nF SDL Figure 4.
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www.ti.com Related Documentation From Texas Instruments 3.3 TPA2012D2 Audio Power Amplifer Evaluation Module Parts List Table 2. TPA2012D2 EVM Parts List Part No. 4 Size Qty. C1-C4 Capacitor, Ceramic, 1 nF, 50V, X7R 0402 4 TDK C1005X7R1H102 C5-C8, C10 Capacitor, Ceramic, 1 µF, 6.3V, Y5V 0402 5 TDK C1005Y5VOJ105 C11 Capacitor, Ceramic, 0.1 µF, 6.
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FCC Warnings This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.