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Connections

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4

SNAU231 – February 2018

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Copyright © 2018, Texas Instruments Incorporated

LM48580 Evaluation Module

6

Connections

Table 2

lists the connections on the EVM board.

Table 2. Connections

Designator

Function

Notes

J1

Shutdown

Active Low Shutdown. Drive SHDN low to disable the device. Connect SHDN to VDD for
normal operation.

J2

VDD/GND

Power supply and ground reference.

J3

GAIN

Gain select:
GAIN = float: AV = 18 dB
GAIN = GND: AV = 24 dB
GAIN = VDD: AV = 30 dB

J4

OUT±

Positive and negative output terminals.

J5

IN±

Positive and negative input terminals.

7

PCB Layout Guidelines

Minimize trace impedance of the power, ground and all output traces for optimum performance. Voltage
loss due to trace resistance between the LM48580 and the load results in decreased output power and
efficiency. Trace resistance between the power supply and ground has the same effect as a poorly
regulated supply: increased ripple and reduced peak output power. Use wide traces for power supply
inputs and amplifier outputs to minimize losses due to trace resistance, as well as route heat away from
the device. Proper grounding improves audio performance, minimizes crosstalk between channels and
prevents switching noise from interfering with the audio signal. Use of power and ground planes is
recommended.

Summary of Contents for LM48580

Page 1: ...n this document Contents 1 Introduction 2 2 Quick Start Guide 2 3 General Description 3 4 Operating Conditions 3 5 Application Circuit Schematic 3 6 Connections 4 7 PCB Layout Guidelines 4 8 Bill Of Materials 5 9 Demonstration Board PCB Layout 6 List of Figures 1 LM48580 Demonstration Board 2 2 Demonstration Board Schematic 3 3 Top Overlay 6 4 Top Solder Mask 6 5 Top Layer 6 6 Bottom Layer 6 7 Bot...

Page 2: ...signal source the LM48580 demonstration board easily exercises features of the amplifier Figure 1 LM48580 Demonstration Board 2 Quick Start Guide Use the following steps to set up the EVM board in hardware mode 1 Short pins 1 VDD and 2 of J1 for normal operation 2 Short pins 1 VDD and 2 on J3 to set the GAIN to 30 dB 3 Connect the load across OUT and OUT 4 Connect a power supply 2 5 V to 5 5 V and...

Page 3: ...ramic speakers and piezo actuators The Class H architecture of the LM48580 offers significant power savings compared to traditional Class AB amplifiers The device provides 30 VPP output drive while consuming only 2 7 mA of quiescent current from a 3 6 V supply The LM48580 features one fully differential input a programmable gain pin and a shutdown pin The gain pin has three settings for 18 dB 24 d...

Page 4: ...d negative input terminals 7 PCB Layout Guidelines Minimize trace impedance of the power ground and all output traces for optimum performance Voltage loss due to trace resistance between the LM48580 and the load results in decreased output power and efficiency Trace resistance between the power supply and ground has the same effect as a poorly regulated supply increased ripple and reduced peak out...

Page 5: ...8R61A474KA61D MuRata D1 1 20 V Diode Schottky 20 V 0 5 A AEC Q101 SOD 523 SOD 523 NSR0520V2T1G ON Semiconductor H1 H2 H3 H4 4 Bumpon Hemisphere 0 44 0 20 Clear Transparent Bumpon SJ 5303 CLEAR 3M J1 J3 2 Header 100 mil 3 1 Gold TH PBC03SAAN PBC03SAAN Sullins Connector Solutions J2 J4 J5 3 Terminal Block 2 1 2 54 mm TH Terminal Block 2 1 2 54 mm TH 282834 2 TE Connectivity L1 1 4 7 µH Inductor Wire...

Page 6: ...bmit Documentation Feedback Copyright 2018 Texas Instruments Incorporated LM48580 Evaluation Module 9 Demonstration Board PCB Layout Figure 3 Top Overlay Figure 4 Top Solder Mask Figure 5 Top Layer Figure 6 Bottom Layer Figure 7 Bottom Solder Mask Figure 8 Drill Drawing ...

Page 7: ...bmit Documentation Feedback Copyright 2018 Texas Instruments Incorporated Revision History Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Date Revision Description February 2018 Initial Release ...

Page 8: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

Page 9: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments LM48580EVM ...

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