1 Introduction
The TPA3100D2 evaluation module consists of a single 20-W, class-D, stereo audio power amplifier complete with a small number of external components mounted on a circuit board that can be used to directly drive a speaker with an external analog audio source as the input.
Top View of EVM
A top view of the TPA3100D2 Audio Power Amplifier Evaluation Module (EVM). It displays connectors for audio input (J1, J2), audio output (J3-J6), power input (J7, J8), and various control pins. Key components like switches (S1, S2), resistors (R1-R6), capacitors (C1-C24), inductors (L1-L4), and the TPA3100D2 IC are visible and labeled. Jumpers for gain, master/slave configuration, and shutdown are also present.
Bottom View of EVM
A bottom view of the TPA3100D2 EVM, showing the underside of the PCB with mounting holes and some component placement indicators.
1.2 TPA3100D2 EVM Specifications
| Parameter | Value |
|---|---|
| Supply voltage range | 10 V to 26 V |
| Supply current (Icc) | 4 A max |
| Continuous output power (Po) | 20 W per channel (8 Ω, 18 V, 3.5% THD+N) |
| Minimum load impedance (RL) | 3.2 Ω |
2 Operation
2.1 Quick Start List for Stand-Alone Operation
Follow these steps to use the TPA3100D2 EVM stand-alone or when connecting it into existing circuits or equipment. Connections to the EVM module can be made using banana plugs for the power supply and output connections. The inputs accept standard RCA plugs.
2.1.1 Power Supply
- Ensure that all external power sources are set to OFF.
- Connect an external regulated power supply adjusted from 10 V – 26 V to the module VCC (J7) and GND (J8) banana jacks, taking care to observe marked polarity.
2.1.2 Evaluation Module Preparations
2.1.2.1 Inputs and Outputs
- If connecting to a fully differential input or a grounded input (the shield of the RCA jack is GND), remove jumpers J9 and J10 from the EVM board. These are located next to the input jacks J1 and J2. If connecting to a floating source, like a portable CD player, install J9 and J10. After setting the J9 and J10 jumpers appropriately, connect the audio source to J1 (RIGHT) and J2 (LEFT).
- Connect a speaker across ROUT+ (J6) and ROUT- (J5). Connect another speaker across LOUT+ (J3) and LOUT- (J4).
- Install both gain jumpers GAIN0 (J12) and GAIN1 (J13). This sets the gain of the amplifier to the lowest level, 20 dB.
- Remove the jumper at MSTR/SLV (J14). If only one TPA3100D2 is evaluated, it must be configured as the master. If multiple EVMs are connected together using the SYNC output (TP2), the additional EVMs must be configured in the slave mode by installing the J14 jumper.
- Remove the jumper (J11). This places the device in a latched mode when a short-circuit event occurs.
2.1.2.2 Control Inputs
- SD (Shutdown): This terminal is active low. A low signal (< 0.8 V) shuts down the amplifier; a high signal (> 2 V) places it in the active state. Holding down switch S1 initiates SHUTDOWN. Releasing S1 returns the amplifier to the active state.
- MUTE: This terminal is active high. A high signal (> 2 V) terminates audio playback and stops output switching; a low signal (< 0.8 V) enables the device. Switch S2 controls the MUTE state. Holding down S2 activates MUTE; releasing it returns the amplifier to the active state.
- GAIN0/GAIN1: These terminals determine the amplifier gain. Installing a jumper in J12 or J13 sets the respective terminal to GND, decreasing gain. Removing the jumper sets it to VREG (~4 V), increasing gain. Logic levels are TTL compatible.
- MSTR/SLV: Used with the SYNC (TP2) output to synchronize switching frequencies of multiple TPA3100D2 devices. Remove J14 for master mode; install for slave mode. TTL compatible.
2.1.2.3 Control Outputs
- FAULT: A TTL compatible output reporting a short-circuit fault. It goes high and remains high until power is cycled, SHUTDOWN is cycled, or MUTE is cycled. If jumper J11 is installed, the MUTE terminal connects directly to FAULT, clearing faults automatically.
2.1.3 Power Up
- Verify correct voltage and input polarity, then turn on external power supplies. The EVM should begin operation.
- Adjust the input signal.
- Adjust the control inputs to the desired settings.
- If no sound is audible, check the MSTR/SLV (J14) jumper position (should be removed for a single EVM).
- Adjust amplifier gain by installing/removing the gain jumpers, J12 and J13.
3 TPA3100D2 EVM Schematic
TPA3100D2 EVM Schematic
A detailed schematic diagram of the TPA3100D2 Evaluation Module. It illustrates the TPA3100D2 integrated circuit and its connections to various external components, including resistors, capacitors, inductors, input/output connectors (J1-J14), switches (S1, S2), and test points (TP1, TP2). The schematic shows power supply connections (VCC, GND), audio inputs (RIN, LIN), audio outputs (ROUT, LOUT), and control signal paths (SD, MUTE, SYNC, GAIN, MSTR/SLV).
4 TPA3100D2 EVM PCB Layers
Top Layer
A diagram showing the top layer of the TPA3100D2 EVM's printed circuit board (PCB). It depicts the physical arrangement of components, connectors, and conductive traces, correlating with the schematic. Key components and connectors are labeled for identification.
Bottom Layer
A diagram illustrating the bottom layer of the TPA3100D2 EVM's PCB. This view shows the copper traces and mounting points on the underside of the board.
5 TPA3100D2 EVM Parts List
TPA3100D2 EVM Parts List
| Ref. | Description | Size | Qty | Mfg | Part # | Vendor # |
|---|---|---|---|---|---|---|
| C1 - C4 | Capacitor, ceramic, 0.22-µF, ±10%, X7R, 25-V | 0603 | 4 | TDK | C1608X7R1C224KT | Digi-key/445-1318-2 |
| C5 | Capacitor, ceramic, 0.01-µF, ±10%, X7R, 50-V | 0603 | 1 | TDK | C1608X7R1H103KT | Digi-key/445-1311-2 |
| C6-C9 | Capacitor, ceramic, 0.1-µF, ±10%, X7R, 50-V | 0603 | 4 | TDK | C1608X7R1H104KT | Digi-key/445-1314-2 |
| C10-C14 | Capacitor, ceramic, 1.0-µF, ±10%, X5R, 10-V | 0603 | 5 | TDK | C1608X5R1A105KT | Digi-key/445-1321-2 |
| C17 - C19 | Capacitor, ceramic, 1.0-µF, +80%/-20%, Y5V, 50-V | 0805 | 3 | TDK | C2012Y5V1H105Z | Digi-key/445-1364-2 |
| C15, C16 | Capacitor, ceramic, 1.0-µF, +80%/-20%, Y5V, 16-V | 0805 | 2 | TDK | C2012Y5V1C105Z | Digi-key/445-1367-2 |
| C20 | Capacitor, ceramic, 10-µF, +80%/-20%, Y5V, 50-V | 1210 | 1 | Murata | GRM32DF51H106ZA01L | Digi-key/490-1891-2 |
| C21, C22 | Capacitor, electrolytic, 220-µF, low impedance | Radial | 2 | Panasonic | EEU-FC1V221 | Digi-key/P10297 |
| L1-L4 | Inductor, 33-µH, radial lead, ferrite material, shielded | Radial | 4 | Toko | A7503AY-330M | |
| C23, C24 | Capacitor, ceramic, 0.47-µF, ±10%, X5R, 35-V | 0805 | 2 | Taiyo-Yuden | GMK212BJ474KG | |
| R1 - R6 | Resistor, chip, 100 ΚΩ, 1/16 W, 5% | 0603 | 6 | Panasonic | ERJ-3GEYJ104V | Digi-Key/P100KG |
| J1, J2 | Phono jack, PC mount, switched | 2 | Switchcraft | PJRAN1X1U03 | Newark/16C1860 | |
| J3 - J8 | Banana jack w/knurled thumbnut (nickel plate) | 6 | Johnson | 111-2223-001 | Digi-Key/J587 | |
| J9 - J14 | Header, 2 position, male | 2 mm | 6 | Norcomp | 2163-36-01-P2 | Digi-Key / 2163S-36 |
| J9-J14(shunts) | Shunt, 2 mm | 2 mm | 6 | Specialty | 2JM-G | |
| TP1, TP2 | Test points, 0.040" mounting hole | 1 | Farnell | 240-345 | ||
| S1, S2 | Switch, momentary, SMD, low profile | 2 | Panasonic | EVQ-PPBA25 | Digi-Key/P8086S | |
| U1 | TPA3100D2RGZ | 48-pin QFN | 1 | TI | TPA3100D2RGZ |
Important Information and Warnings
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. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference.
EVM Terms and Conditions
Texas Instruments (TI) provides the enclosed Evaluation Module and related material (EVM) to you, the user, (you or user) SUBJECT TO the terms and conditions set forth below. By accepting and using the EVM, you are indicating that you have read, understand and agree to be bound by these terms and conditions. IF YOU DO NOT AGREE TO BE BOUND BY THESE TERMS AND CONDITIONS, YOU MUST RETURN THE EVM AND NOT USE IT.
This EVM is provided to you by TI and is intended for your INTERNAL ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY. It is provided "AS IS" and "WITH ALL FAULTS." It is not considered by TI to be fit for commercial use. As such, the EVM may be incomplete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product. As a prototype, the EVM does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical requirements of the directive.
Should this EVM not meet the specifications indicated in the EVM User's Guide, it may be returned within 30 days from the date of delivery for a full refund of any amount paid by user for the EVM, which user agrees shall be user's sole and exclusive remedy. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY TI TO USER, AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR NON-INFRINGEMENT.
TI shall have no obligation to defend any claim arising from the EVM, including but not limited to claims that the EVM infringes third party intellectual property. Further, TI shall have no liability to user for any costs, losses or damages resulting from any such claims. User shall indemnify and hold TI harmless against any damages, liabilities or costs resulting from any claim, suit or proceeding arising from user's handling or use of the EVM, including but not limited to, (i) claims that the EVM infringes a third party's intellectual property, and (ii) claims arising from the user's use or handling of the EVM. TI shall have no responsibility to defend any such claim, suit or proceeding.
User assumes all responsibility and liability for proper and safe handling and use of the EVM and the evaluation of the EVM. TI shall have no liability for any costs, losses or damages resulting from the use or handling of the EVM. User acknowledges that the EVM may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction of the EVM it is the user's responsibility to take any and all appropriate precautions with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE USER'S INDEMNITY OBLIGATIONS SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES WHETHER TI IS NOTIFIED OF THE POSSIBILITY OR NOT.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein.
User agrees to read the EVM User's Guide and, specifically, the EVM warnings and Restrictions notice in the EVM User's Guide prior to handling the EVM and the product. This notice contains important safety information about temperatures and voltages. It is user's responsibility to ensure that persons handling the EVM and the product have electronics training and observe good laboratory practice standards. By providing user with this EVM, product and services, TI is NOT granting user any license in any patent or other intellectual property right.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265. Copyright © 2005, Texas Instruments Incorporated.
EVM Warnings and Restrictions
It is important to operate this EVM within the supply voltage range of -0.3 V to 30 V and input voltage range of -0.3 V to 4.5 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.
EVM Warnings and Restrictions (continued)
During normal operation, some circuit components may have case temperatures greater than 85°C. The EVM is designed to operate properly with certain components above 85°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.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265. Copyright 2005, Texas Instruments Incorporated.
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. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards.
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Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265. Copyright © 2005, Texas Instruments Incorporated.
