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This user's guide describes the characteristics, operation, and use of the TPA3251 evaluation module
(EVM). A complete printed-circuit board (PCB) description, schematic diagram, and bill of materials are
also included.
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3
Hardware Configuration
4
EVM Design Documents
1
TPA3251 Evaluation Module
2
EVM Board (Top Side)
3
EVM Board (Bottom Side)
4
AIB Input: THD+N vs Frequency
5
AIB Input: THD+N vs Power
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7
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SLAU751 - November 2017
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Figure 1. TPA3251 Evaluation Module
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Copyright © 2017, Texas Instruments Incorporated
TPA3251 Evaluation Module
Contents
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User's Guide
SLAU751 - November 2017
TPA3251 Evaluation Module
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Table of Contents
Related Manuals for Texas Instruments TPA3251
Summary of Contents for Texas Instruments TPA3251
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Page 1: Table Of Contents
User's Guide SLAU751 – November 2017 TPA3251 Evaluation Module This user's guide describes the characteristics, operation, and use of the TPA3251 evaluation module (EVM). A complete printed-circuit board (PCB) description, schematic diagram, and bill of materials are also included. Figure 1. TPA3251 Evaluation Module Contents ..................... - Page 2 AIB Connector (J28) Pinout ................... TPA3251EVM Bill of Materials Trademarks PurePath is a trademark of Texas Instruments. CoilCraft is a trademark of Coilcraft, Incorporated. Molex is a trademark of Molex, LLC. All other trademarks are the property of their respective owners.
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Page 3: Quick Start (Btl Mode)
Connect the positive RCA male jack to the female RCA jack input A/AB (J3-RED) and connect the negative RCA male jack to the female RCA jack input B (J14-BLACK). SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... - Page 4 INC/D SE INPUT 1 to 2 INC-SEL RCA 1 to 2 IND-SEL RCA 1 to 2 INA-SEL RCA 1 to 2 INB-SEL RCA C_START TPA3251 Evaluation Module SLAU751 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
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Page 5: Setup By Mode
20000 0.01 100 200 Frequency (Hz) Power (W) D013 D004 Figure 6. Molex™ Input: THD+N vs Frequency Figure 7. Molex Input: THD+N vs Power SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 6: Rca Input: Thd+N Vs Frequency
PBTL Mode (One-Speaker Output) This mode uses all four half bridges for a mono output, allowing for the maximum power output from the device across one load. TPA3251 Evaluation Module SLAU751 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... - Page 7 All measurements are taken at an audio frequency = 1 kHz, PVDD_X = 36 V, RL = 4 Ω, fS = 600 kHz, ROC = 22 kΩ, Output filter: L = 7μH, C = 0.68 µF, with AES17 + AUX-0025 measurement filters. SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
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Page 8: Aib Input: Thd+N Vs Frequency
Differential inputs: Set J26, J27, J34, and J35 to RCA. i. Connect the male RCA jack to the female RCA jack input A/AB (J3-RED) for the OUTA speaker. TPA3251 Evaluation Module SLAU751 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... - Page 9 All measurements are taken at audio frequency = 1 kHz, PVDD_X = 36 V, RL = 4 Ω, fS = 600 kHz, ROC = 22 kΩ, Output filter: L = 7 μH, C = 0.68 µF, with AES17 + AUX-0025 measurement filters. SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
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Page 10: Rca Input Thd+N Vs Power
The TPA3251EVM is equipped with LED indicators that illuminate when the FAULT or CLIP_OTW pin (or both) goes low. See Table 6 TPA3251 175-W Stereo, 350-W Mono PurePath™ Ultra-HD Analog- Input Class-D Amplifier for more details on which events trigger the pins to go low. - Page 11 The TPA3251EVM uses the NE5532 to buffer the differential input signal to the differential inputs of the TPA3251 device. Use input RCA jack J3 to provide INA, RCA jack J14 to provide INB, RCA jack J18 to provide INC, and RCA jack J15 to provide IND with differential inputs.
- Page 12 Speaker-level output from audio class-D EVM (SE or one side of BTL) Amp Out D Speaker-level output from audio class-D EVM (SE or one side of BTL) TPA3251 Evaluation Module SLAU751 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
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Page 13: Evm Power Tree
Figure 22. EVM Power Tree LC Filter Overview Included near the output of the TPA3251 device are four output LC filters. These output filters filter the pulse-width modulation (PWM) output, leaving only the audio content at high power, which is fed to the speakers. -
Page 14: Tpa3251 Evm Top Composite Assembly
The RESET supervisor also ensures that the device is put into reset if one of the power rails experiences a brownout. This circuit combined with the RESET switch (S1) help ensure that the TPA3251 can be placed in reset easily as needed or automatically if there is a power supply issue. -
Page 15: Tpa3251 Evm Bottom Composite Assembly
EVM Design Documents www.ti.com Figure 26. TPA3251 EVM Bottom Composite Assembly SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 16: Tpa3251Evm Board Dimensions
EVM Design Documents www.ti.com TPA3251EVM Board Layouts Figure 27 shows the EVM board dimensions. Figure 27. TPA3251EVM Board Dimensions TPA3251 Evaluation Module SLAU751 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 17: Tpa3251Evm Schematic 1
IN C/D 100k INPUT SE D RIGHT- DIFF C- IN-D_RCA 10.0k VMID NE5532ADR AGND2 Copyright © 2017, Texas Instruments Incorporated Figure 28. TPA3251EVM Schematic 1 SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... -
Page 18: Tpa3251Evm Schematic 2
1µF VDD-RST RESET RESET FAULT CLIP_OTW Orange FAULT 1µF 3.30k 0.1uF MONITORS TPS3802K33DCKR RESET RESET-SW Copyright © 2017, Texas Instruments Incorporated Figure 29. TPA3251EVM Schematic 2 PVDD PVDD +15V 0.1uF 15V-VR 2.2µF 0.1µF 0.047µF 100µH 1.5A 47µF 1µF 0.01µF RON/SD... -
Page 19: Tpa3251Evm Bill Of Materials
HEX STANDOFF 4-40 H8, H9, H10, H11, H12 HEX STANDOFF 4-40 ALUMINUM 3/4" 2204 Keystone ALUMINUM 3/4" Advanced Thermal HEATSINK Heat Sink, Vertical Heatsink ATS-TI1OP-519-C1-R3 Solutions SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated... - Page 20 SH1, SH2, SH3, SH4, SH5, SH6, SH7, SH8, SH9, SH10, SH11, Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA SH12, SH13, SH14, SH15, SH16, SH17, SH18 TPA3251 Evaluation Module SLAU751 – November 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
- Page 21 ERJ-8RQF3R3V Panasonic R63, R64, R65, R66 RES, 0, 5%, 0.1 W, 0603 0603 CRCW06030000Z0EA Vishay-Dale RES, 0, 5%, 0.125 W, 0805 0805 ERJ-6GEY0R00V Panasonic SLAU751 – November 2017 TPA3251 Evaluation Module Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
- Page 22 IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products;...
- Page 23 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments TPA3251EVM...