User's Guide

SLOU244 – December 2009

TPA2011D1 Audio Power Amplifier Evaluation Module

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The TPA2011D1 audio power amplifier evaluation module is a complete, low-power, Class-D, mono audio power amplifier capable of delivering 1.47 W into 8 Ω and 2.57 W into 4 ohms at 1% THD+N (YFF package). All components and the evaluation module are Pb-free. The TPA2011D1 evaluation module

(EVM) consists of a TPA2011D1 device and all necessary components to evaluate it.

Contents

Introduction

Operation

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Reference

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Related Documentation From Texas Instruments

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1

List of Figures

Top Layer

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Bottom Layer

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TPA2011D1EVM Schematic Diagram

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List of Tables

TPA2011D1EVM Parts List

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1 Introduction

This section provides an overview of the Texas Instruments (TI) TPA2011D1 NanoFree™ WCSP audio amplifier evaluation module (TPA2011D1EVM). It includes a brief description of the module and a list of

EVM specifications.

1.1

TPA2011D1EVM Specifications

Supply voltage range, V

DD

Power supply current rating required

Continuous output power, P

O

: 4Ω BTL, V

DD

= 5 V, THD+N = 10%

Audio input voltage, V

I

Minimum load impedance, Z

L

2.5 V to 5.5 V

2.5 A

3.24 W

0 V to V

DD

4 Ω

2 Operation

This section describes how to operate the TPA2011D1EVM.

2.1

Quick Start for Stand-Alone Operation

Use the following steps when operating the TPA2011D1EVM stand-alone or when connecting the EVM into existing circuits or equipment.

NanoFree is a trademark of Texas Instruments.

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Operation www.ti.com

2.1.1

Power and Ground

1. Ensure that the external power sources are set to OFF.

2. Set the power supply voltage between 2.5 V and 5.5 V. When connecting the power supply to the

EVM, attach the ground connection to the GND header pin first, and then connect the positive supply to the VDD header pin. Verify that the connections are made to the correct header pins.

2.1.2

Inputs and Outputs

2.1.2.1

Audio

1. Ensure that the audio source is set to the minimum level.

2. Connect the audio source to the RCA input socket, IN. In case of differential audio input ensure that the jumper JP IN is not inserted. In case of a single-ended audio input ensure that the jumper JP IN is inserted, thereby grounding IN- through the input capacitor C2.

3. Connect a speaker (4 Ω -32 Ω ) between the output banana jacks OUT+ and OUT-.

2.1.2.2

Enable Control

The TPA2011D1 has an active-high enable pin EN. A logic high on this pin places the device in the operating mode, and a logic low on this pin places the device in the shutdown mode. Press and hold pushbutton S1 on the EVM to place the TPA2011D1 in shutdown mode. Release pushbutton S1 to restart normal operation.

2.1.2.3

Output filter

The TPA2011D1 EVM provides two test outputs TPOUT+ and TPOUT- between which a filtered version of the BTL output of the TPA2011D1 can be obtained by populating the filter components R4, R5, C9 and

C10 (see

Table 1

for typical components). The filtered output is useful in evaluating performance parameters of the TPA2011D1 using measurement equipment such as the Audio Precision.

2.2

Power Up

1. Verify the correct connections as described in Sections 2.1.1 and 2.1.2.

2. Verify the voltage setting of the power supply is between 2.5 V and 5.5 V, and turn on the power supply. Proper operation of the EVM begins.

3. Adjust the audio signal source as needed.

2 TPA2011D1 Audio Power Amplifier Evaluation Module

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3 Reference

This section includes the EVM PCB layout reference, schematic, and parts list.

3.1

TPA2011D1EVM PCB Layers

Reference

Figure 1. Top Layer

Figure 2. Bottom Layer

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Reference

3.2

TPA2011D1EVM Schematic Diagram

Vdd

VDD

C3

10ufd/6.3V

GND

GND

IN www.ti.com

Vdd

R4

1.0K

C9

4700pfd/50V

TP OUT-

JP1

C1

0.1ufd/25V

C2

0.1ufd/25V

R2

150K

R3

150K

U1

C4

0.1ufd/16V

GND

R5

1.0K

C10

4700pfd/50V

TP OUT+

GND

TPA2011D1YFF

GND

STANDOFFS

0.5in

0.5in

0.5in

0.5in

GND GND GND GND

0.5in

0.5in

0.5in

0.5in

GND

S1

Vdd

R1

100K

FB1

220ohms/2A

FB2

220ohms/2A

R100

0.0

R101

0.0

C7

1000pfd/100V

C8

1000pfd/100V

GND GND GND

TVS1

DNP

GND

TVS2

DNP

OUT +

OUT -

TOP VIEW

A1 A2 A3

B1 B2 B3

C1 C2 C3

Figure 3. TPA2011D1EVM Schematic Diagram

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3.3

TPA2011D1 Audio Power Amplifier Evaluation Module Parts List

Table 1. TPA2011D1EVM Parts List

Part No.

U1

TVS1,

TVS2

C7, C8

C1, C2

C9, C10

C3

Description

2.75W STEREO CLASS D AMP WCSP9-YFF

ROHS

TRANSIENT VOLTAGE SUPPRESSION BIDIR 6.1V

9A SOD-882 ROHS

CAP SMD0603 CERM 1000PFD 100V 10% X7R

ROHS

CAP SMD0603 CERM 0.1UFD 25V 10% X5R

ROHS

CAP SMD0805 CERM 4700PFD 50V 5% X7R

ROHS

CAP SMD0603 CERM 10UFD 6.3V 20% X5R

ROHS

C4

R2, R3

R1

R4,R5

R100,

R101

FB1,FB2

CAP SMD0402 CERM 0.1UFD 16V 10% X7R

ROHS

RES SMD0603 5% 1/10W 150K ROHS

RES 100K OHM 1/16W 1% SMD 0603 ROHS

RES SMT0805 1.0K 5% 1/8W ROHS

RES 0.0 OHM 1/16W 5% SMD 0603 ROHS

JP1

FERRITE CHIP, 220 OHMS 2A 100MHZ SMD 0603

ROHS

HEADER 2 PIN MALE, PCB STRAIGHT GOLD

ROHS

IN JACK, RCA 3-PIN PCB-RA BLACK ROHS

TP OUT+ PC TESTPOINT, RED, ROHS

TP OUTPC TESTPOINT, BLACK, ROHS

S1

JP1

SWITCH, MOM, 160G SMT 4X3MM ROHS

SHUNT, BLACK AU FLASH 2mmLS

GND,VDD, BINDING-POST,NONINS,THRU,ROHS

OUT

+,OUT -

HW1,HW2, STANDOF ,4-40 0.5IN 3/16IN DIA ALUM RND F-F

HW3,HW4

HW1,HW2, 4-40 SCREW, STEEL 0.250 IN

HW3,HW4

Size

0603

0603

0805

0603

0402

0603

0603

0805

0603

0603

Qty.

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Vendor Part Number

Texas Instruments , TPA2011D1YFF

ST Microelectronics, ESDALC6V1-1BT2

Panasonic, PCC1952CT

AVX, 478-1244-1

AVX, 478-3770-1

Panasonic, PCC2395CT

Taiyo Yuden, 490-3261-1

Panasonic, P150KGCT

Panasonic, P100KHCT

Panasonic, P1.0KACT

Panasonic, P0.0GCT

TDK, 445-1565-1

Sullins, S1011E-02 2

Switchcraft, 65K7770

Keystone Electronics, 5000K

Keystone Electronics, 5001K

E-Switch, EG4344CT

Norcomp Inc., SP2-001E

Emerson NPCS, J587

Keystone, 2027K

Building Fasteners, H34

4 Related Documentation From Texas Instruments

• TPA2011D1 Datasheet: 3.2W Mono Filter-Free Class-D Audio Power Amplifier with Auto-Recovering

Short-Circuit Protection .

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This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES

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EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 2.5 V to 5 V and the output voltage range of 0 V to 5.5 V.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.

Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 60°C. The EVM is designed to operate properly with certain components above 60°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch.

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