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| TPA0102 Audio Power Amplifier Evaluation Module APPLICATION REPORT: SLOU005 Date: July 1997 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof. Copyright (c) 1999, Texas Instruments Incorporated TRADEMARKS TI is a trademark of Texas Instruments Incorporated. Other brands and names are the property of their respective owners. Operating the TPA0102 Audio Amplifier EVM (SLOP101) 3 Contents I. Quick Start ................................................................................................................. 6 1. Overview ................................................................................................................... 7 1.1 Introduction ......................................................................................................................... 7 1.2 Layout Definition ................................................................................................................ 7 1.3 Operation Notes .................................................................................................................. 9 2. User's Guide ........................................................................................................... 11 2.1 Schematic .......................................................................................................................... 11 2.2 Input/Output Connections ................................................................................................. 12 2.2.1 Key Features ......................................................................................................... 12 2.3 Controls Explanation......................................................................................................... 13 2.5 Bill of Materials ................................................................................................................ 17 Figures Figure 1. EVM Component Placement................................................................................................ 8 Figure 2. TPA0102 EVM Schematic................................................................................................. 12 Figure 3. TPA0102 Input/ Output Connections................................................................................. 13 Tables Table 1. Bill of Materials................................................................................................................... 17 4 SLOU005 TPA0102 Audio Power Amplifier Evaluation Module Abstract The Purpose of this document is to serve as a reference manual for the TPA0102PWP Stereo 1.5-W Audio Power Amplifier Evaluation Module (SLOP101). This document provides information on the optimal setup and operation of this product. How to Use this Manual This document contains the following chapters: Chapter 1 Overview A general description of the TPA0102, its key features, operating specifications, and design notes. Chapter 2 User's Guide A description of the TPA0102, hardware including board schematic, connections, layout and bill of materials. Operating the TPA0102 Audio Amplifier EVM (SLOP101) 5 I. Quick Start Included below is a quick checklist of setup steps to get the TPA0102 up and running fast. 1. Set S1 to the "off" position. 2. Align the TPA0102 in socket U2, such that its pins line up exactly with the socket, and firmly connect it to the P-n-P board. 3. Check the power supply jumper setting on the P-n-P board. To use battery power select JP3, to select wall mount AC/DC power select JP2, or to use a bench type DC power supply select JP1 Note: be sure only one of these three jumpers is connected by a shorting block. 4. Check the mode/mute jumper circuitry (JP6, JP7, JP8). To begin with, set JP7 to Lo, JP8 to Hi and JP6 to Mode. This arrangement causes theTPA0102 to be in BTL mode when no headphones are present and SE mode when HP are plugged in. In the future refer to Table 1 in the P-n-P board Application Report (SLOU001) to adjust these settings. 5. Check the Audio Input Path Selection Circuitry, if there is no EVM present in U1, then set S2 to the "off" position 6. Set S3 to the "U2" position. 7. Connect a mono audio source to either J3 or J5 (or both), or connect a stereo audio source to J4. 8. Connect a 4 or 8 speaker(s) to either (or both of) the RCA jacks at J7 and J9 or to the wire clips at J8. 9. Connect your power supply to the P-n-P board. 10. Push S1 to the "on" position. Activate the audio source. Step 10 will activate the EVMs present on the P-n-P. If you do not hear sound, please consult the troubleshooting section of the P-n-P Board application report (SLOU001). To use power from J1, J2, B1 a DC/DC converter must be used at U6. If no converter is present, use DC power at J6. 6 SLOU005 1. 1.1 Overview Introduction The TPA0102 Sample EVM is designed to provide the basic circuitry required to evaluate the TPA0102 performance without having to invest in a PCB layout and assembly. Refer to the TPA0102 data sheet for a description of the basic circuit configuration. 1.2 Layout Definition Figure 1 TPA0102 EVM Circuit Component Placement C7 RHP GND RIN GND C6 C8 R14 TPA0102 R10 RVDD + R7 C11 R9 GND S5 S3 C9 C10 S4 R11 S6 ROUT+ GND ROUTHP/L* SE/BTL* R12 R8 C3 GND C1 LIN GND LHP C2 R1 R13 C4 C5 R4 TPA0102 SAMPLE EVM REV.A1 Lit.# SLOP101 S2 S1 R6 R12 MUTE LOUTGND LOUT+ + C12 R2 LVDD R3 U1 GND Operating the TPA0102 Audio Amplifier EVM (SLOP101) 7 TPA0102 U1 - TPA0102PWP stereo 1.5 W Audio Amplifier C1, C2 - Capacitor, 1.0 uF Ceramic C3 - Capacitor, 5 pF Ceramic C4, C5 - Capacitor, 2.2 uF Ceramic C6, C7 - Capacitor, 1.0 uF Ceramic C8 - Capacitor, 5 p uF Ceramic C9, C10 - Capacitor, 2.2 uF Ceramic C11, C12 - Capacitor, 10 uF Electrolytic R1, R3, R4 - Resistor, 20 k Carbon R2, R5, R6 - Resistor, 100 k Carbon R7, R11 - Resistor, 100 k Carbon R8, R9, R10 - Resistor, 20 k Carbon S1, S3, S4 - 2 pin header S2 - Switch, momentary, push botton 8 SLOU005 1.3 Operation Notes The TPA0102 EVM (SLOP101) was designed to plug into TI's Plug-n-Play Audio Evaluation Platform (SLOP097). Slot U2 on the Plug-n-Play Audio Evaluation Platform is compatible with the TPA0102 EVM. No soldering is required for use in the Plug-n-Play Audio Evaluation Platform system. Standard speaker jacks, RCA jacks and 1/8" headphone jacks are provided on the Plug-n-Play Audio Evaluation Platform for quick and easy evaluation of all TI TPA series audio power amplifier EVMs. The TPA0102 is normally used as a single chip audio drive speaker and headphone/line outputs on notebook computers. The connection pins of the TPA0102 EVM are on a 0.1" grid for easy interface to standard plugboard based prototype systems. The thermal layout of the EVM is important. Linear audio power amplifiers dissipated large amounts of heat during operation. The data sheet for the TPA0102 (SLOS166a) details heat dissipation for 5 and 3.3 volt applications. The PowerPAD should be connected to as much copper area as possible on the surface of the PCB. This copper area should then be connected with vias to ground plane layers inside the PCB. This becomes more important in high ambient temperature applications. The 24-pin TSSOP PowerPAD package is designed to dissipate heat into the PCB. Proper layout can dissipate up to 4 Watts of heat in room temperature applications. Special consideration must be given to thermal layout due to the effect on maximum ambient temperature operation. It is recommended to place a copper area under the IC equal to the flat area of the IC body. This copper area should then be connected to the ground plane layer with vias. The vias should not use WEBed connections but should have a solid connection to the copper areas. The solid connections makes a much better thermal connection. Refer to the TPA0102 data sheet, Thermal Applications section, for detailed information on thermal layout and related thermal calculations. Operating the TPA0102 Audio Amplifier EVM (SLOP101) 9 With 4 ohm speakers, 1.5 Watts rms power levels are possible at less than .05 % Total Harmonic Distortion (THD) with a steady-state sine wave input. Real music power will vary according to the type of music. Peak-to-average ratios vary greatly among different types of music. A 9 to 12 dB peak-toaverage ratio is a good figure for rough calculations. In terms of power this means 1.5 Watts peaks would come from an average listening power of 94 mW for 12 dB and 188 mW for 9 dB. HeadroomdB = 10 Log (Pmax/Pavg) 10 SLOU005 2. 2.1 User's Guide Schematic Figure 2 TPA PUMP UP THE VOLUME TPA0102 Sample EVM Circuit, Rev A1 SLOP101 1 GND/HS NC L Out + L Line In L HP In L Bypass L Vdd Shutdown Mute Out L Out Mute In GND/HS GND/HS 24 NC 23 R Out + 22 R Line In 21 R HP In 20 R9 20 k C9 2.2 uF R10 20 k C7 1 uF R7 R14 100 k 200 k C8 5 pF R8 20 k C6 1 uF R2 20 k 2 3 4 L Out + C1 1 uF C3 5 pF R1 20 k R13 200 k R Out + L IN C2 1 uF R3 20 k R4 20 k C4 2.2 uF R IN 5 6 7 L HP LVDD GND L Out S2 LV DD C12 10 uF R5 100 k R Bypass 19 R Vdd 18 NC 17 HP/Line* R Out 16 15 R HP LV DD S5 RVDD C10 2.2 uF LV DD C11 10 uF S3 C5 2.2 uF 8 9 GND HP/Line* S1 10 11 12 S6 SE/BTL* 14 LV DD GND/HS 13 R11 100 k S4 Mute In R6 100 k R Out SE/BTL* 03/10/97 Compatible with Plug-N-Play, TPA-PNP1 Rev C.1 R12 100 k TPA0102 EVM Schematic Operating the TPA0102 Audio Amplifier EVM (SLOP101) 11 2.2 Input/Output Connections Figure 3 TPA0102 EVM Hookup Diagram TPA0102 EVM Hookup Diagram 3.3 V to 5.0 V DC TPA + Power Supply C1 10 uF R1 100 k R2 1 k PUMP UP THE VOLUME - Audio Input RVDD GND C7 R10 + RHP R7 C11 S5 GND R8 S3 RIN R9 GND C6 C9 C10 S4 C8 R14 TPA0102 R11 ROUT+ GND ROUTS6 HP/L* SE/BTL* R12 R3 100 k C2 C3 C2,3 33-1000 uF Headphone Output Standard 1/8" Stereo Jack C3 R13 TPA0102 SAMPLE EVM REV.A1 Lit.# SLOP101 S2 S1 R6 R12 MUTE LOUTGND LOUT+ U1 GND C1 LIN GND R1 LHP C2 R3 Note: Remove R11 and R12 for proper operation in this configuration. C4 C5 R4 + R2 C12 LVDD Standard 1/8" Stereo Jack GND S1 - In = Ultra-Low Current Shutdown when S2 pressed or ext. MUTE High Out = Low Current Mute Only when S2 pressed or ext. Mute High. S2 - Press and hold to Mute/Shutdown. S3 - In = MUX locked on R/LHP inputs, Out = default R/LIN inputs. (control external) S4 - In = Locked in SE mode, Out = default BTL mode (control external) S5 - In = LVDD connected to RVDD, Out = Mono mode or LVDD externally connected S6 - In = external SE/BTL* connected with HP/L* (S3,4 should be Out), Out = Separate control of HP/L and SE/BTL S7 - External mute switch, Closed is mute, open is normal operation S7 Mute R4 100 k Speakers mute when Headphone plugged in. 03/10/97 The hookup diagram shows a complete stereo output drive system using the TPA0102 EVM (SLOP101) configured to drive stereo speakers and a headphone output jack. A standard 1/8" stereo input jack is shown providing a convenient connection to CD players and other commercial sources of audio signals. 2.2.1 Key Features The key features of the system are: u Stereo Bridge-Tied-Load (BTL) drive of 4 ohm speakers. BTL drive for internal speakers provides the optimum Audio-Power-toSupply-Voltage ratio, eliminates output coupling capactorss and enhances power supply noise rejection. Stereo Single-Ended (SE) drive of 4 ohm and greater external speakers or headphones. SE drive is required for the standard 1/8" stereo jack due to the 3-wire connection to the loads. Output coupling capacitors are required for the SE outputs as shown. u 12 SLOU005 u Mute of the Speaker Drive - The BTL/SE control input on the EVM is used to control the mode of the amplifier. When the speakers are in use, the TPA0102 is in BTL mode. When a headphone plug is inserted into the output jack, the speakers mute and the TPA0102 is in SE mode. Independent Input MUX for headphone and speaker drive Typically small speakers of the type found in computer systems require a higher gain than a headphone set. A ratio of about 10 is a good place to start. In the above configuration the gain of the speakers can be adjusted such that when the headphone is plugged in the listening level is essentially the same as the speakers. The gain of the headphone channel is fixed at -1. For a quick adjustment, set the gain pots to about mid scale. Using S6 to tie the BTL/SE control input to the HP/L control input will automatically switch the input channels when the headphone plug is inserted. u 2.3 Controls Explanation Power: 3.0 to 5.5 Vdc, 2 A peak, 1.25 A rms (Peak Tone), .5 A rms (12 dB Normal Music) Audio Inputs: L/R IN1, Cap Coupled (1.0 uF), 0.75 Vpp Max, G = 2 to 22 BTL Mode, L/R HP2 , Cap Coupled (1.0 uF), 4 Vpp Max, G=1 Speaker Outputs: L/R Out+/Out-, BTL 4 ohm drive, 1.5 W rms continuous L/R Out+, SE 4 ohm drive, 400 mW rms continuous L/R Out+, SE 32 ohm drive, 70 mW rms continuous BTL/SE* Input: High for SE Mode, Low for BTL Mode - S4 IN locks in SE mode. HP/LINE* Input: High for L/R HP2, Low for L/R Line - S3 locks in L/R HP2 select. Operating the TPA0102 Audio Amplifier EVM (SLOP101) 13 Mute In Input: High places amplifier in low current state (S1 IN follows mute to place device in ultra-low current mode), outputs are muted. Mute Switch: Switch is a momentary action push button. Press S2 to pull mute high and mute amplifier. 14 SLOU005 2.4 Layout NOTE: Layouts are not drawn to scale Operating the TPA0102 Audio Amplifier EVM (SLOP101) 15 Note: Layouts are not drawn to scale. 16 SLOU005 2.5 ITE M Bill of Materials Table 1 - Bill of Materials DESCRIPTION REFERENCE PCBA MANUFACTURER'S PART NUMBER (MURATA) GRM42-6Y5V105Z16BL (TDK) C3216X5R1A225 (PANASONIC) ECU-V1H050CCN (PANASONIC) ECS-TOJY106R (PANASONIC) ERJ-6GEYJ203V (PANASONIC) ERJ-6GEYJ104V (BOURNS) 3323P-1-204 (PANASONIC) P8048SCT-ND (NORCOMP) (3M) (TI) TPA0102 (COMPUROUTE) TOOL # 008032 MANUFACTURERS PART NUMBER (NEWARK) 93F2254 DESIGNATOR QUANTITY 1 2 3 4 5 6 7 8 9 10 11 12 CAP., 1.0UF, +80/-20%, NON POLARIZED, SMD SIZE 1206 CAP., 2.2UF,20%, NON POLARIZED, SMD SIZE 1206 CAP, 5.0 PF, SMD, SIZE 0805 CAP., 10UF/6.3V,SMD,SIZE "A" RES., 20 K OHM, 1/8W, 5%, SMD, SIZE 0805 RES., 100 K OHM, 1/8W, 5%, SMD, SIZE 0805 POT., 200 K OHM, 1/8W, 20%, THRU HOLE SWITCH, MOMENTARY, SMD HEADER, 2MM, 2 POSITION SHUNTS, 2MM IC., TPA0102, AUDIO AMPLIFIER, 1W, 2 CHANNEL,SMD, 24 PIN TSSOP PCB, TPA0102 SAMPLE EVM (Rev. A1) C1,C2,C6,C7 C4,C5,C9,C10 C3,C8 C11,C12 R1,R3,R4,R8,R9 ,R10 R2,R5,R6,R7,R1 1,R12 R13,R14 S2 S1,S3,S4 P1,P3,P4 U1 PCB1 4 4 2 2 6 6 2 1 3 3 1 1 (DIGI-KEY) PCC050CNCT-ND (DIGI-KEY) PCS1106CT-ND (DIGI-KEY) P20KABK-ND (DIGI-KEY) P100KABK-ND (DIGI-KEY) 3323P-204-ND (DIGI-KEY) P8048SCT-ND (DIGI-KEY) 2163-02-ND (DIGI-KEY) 953170-30-ND Operating the TPA0102 Audio Amplifier EVM (SLOP101) 17 |
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