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LM48580 Boomer Audio Power Amplifier Series High Efficiency Class H, High Voltage, Haptic Piezo Actuator / Ceramic Speaker Driver
SNAS491C
February 2010 – January 2025
LM48580
PRODUCTION DATA
CONTENTS
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LM48580 Boomer Audio Power Amplifier Series High Efficiency Class H, High Voltage, Haptic Piezo Actuator / Ceramic Speaker Driver
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics: VDD = 3.6 V #GUID-238D0643-98EF-4676-B2E1-A584A5DF74F7/SNAS491599
5.6
Typical Performance Characteristics
Parameter Measurement Information
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Class H Operation
6.3.2
Properties of Piezoelectric Elements
6.3.3
Differential Amplifier Explanation
6.3.4
Thermal Shutdown
6.3.5
Gain Setting
6.4
Device Functional Modes
6.4.1
Shutdown Function
7
Application and Implementation
7.1
Application Information
7.2
Typical Application
7.2.1
Design Requirements
7.2.1.1
Proper Selection of External Components
7.2.1.1.1
Boost Converter Capacitor Selection
7.2.2
Detailed Design Procedure
7.2.2.1
Boost Converter Output Capacitor Selection
7.2.2.1.1
Inductor Selection
7.2.2.1.2
Diode Selection
7.2.2.2
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Development Support
8.2
Receiving Notification of Documentation Updates
8.3
Community Resources
8.4
Trademarks
9
Revision History
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
YZR|12
MXBG273
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snas491c_oa
snas491c_pm
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Data Sheet
LM48580
Boomer
Audio Power Amplifier Series High Efficiency Class H, High Voltage, Haptic Piezo Actuator / Ceramic Speaker Driver
1
Features
Class H Driver
Integrated Boost Converter
Bridge-tied Load Output
Differential Input
Three Pin-Programmable Gains
Low Supply Current
Minimum External components
Micro-Power Shutdown
Thermal Overload Protection
Available in Space-Saving 12-bump DSBGA Package
2
Applications
Touch Screen Smart Phones
Tablet PCs
Portable Electronic Devices
MP3 Players
Key Specifications:
Output Voltage at V
DD
= 3.6V,
R
L
= 6μF + 10Ω, THD+N ≤ 1%
30V
P-P
(Typical)
Quiescent Power Supply Current at 3.6V
2.7mA (Typical)
Power Dissipation at 25V
P-P
800mW (Typical)
Shutdown Current
0.1μA (Typical)