LM4846TL/NOPB National Semiconductor, LM4846TL/NOPB Datasheet

IC AMP AUDIO PWR 1.15W AB 25USMD

LM4846TL/NOPB

Manufacturer Part Number
LM4846TL/NOPB
Description
IC AMP AUDIO PWR 1.15W AB 25USMD
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4846TL/NOPB

Output Type
1-Channel (Mono) with Stereo Headphones
Max Output Power X Channels @ Load
1.15W x 1 @ 8 Ohm; 75mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
3D, Depop, I²C, Mute, Shutdown, SPI, Thermal Protection, Volume Control
Mounting Type
Surface Mount
Package / Case
25-MicroSMD
Operational Class
Class-AB
Audio Amplifier Function
Headphone/Speaker
Total Harmonic Distortion
0.5@8Ohm@500mW%
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Supply Current (max)
11@3.3VmA
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
88dB
Single Supply Voltage (min)
2.7V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
25
Package Type
uSMD
For Use With
LM4846TLEVAL - BOARD EVALUATION LM4846TL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4846TLTR
© 2006 National Semiconductor Corporation
LM4846
Output Capacitor-less Audio Subsystem with
Programmable National 3D
General Description
The LM4846 is an audio power amplifier capable of deliver-
ing 500mW of continuous average power into a mono 8Ω
bridged-tied load (BTL) with 1% THD+N, 25mW per channel
of continuous average power into stereo 32Ω single-ended
(SE) loads with 1% THD+N, or an output capacitor-less
(OCL) configuration with identical specification as the SE
configuration, from a 3.3V power supply.
The LM4846 features a 32-step digital volume control and
eight distinct output modes. The digital volume control, 3D
enhancement, and output modes (mono/SE/OCL) are pro-
grammed through a two-wire I
patible interface that allows flexibility in routing and mixing
audio channels. The LM4846 has three input channels: one
pair for a two-channel stereo signal and the third for a
single-channel mono input.
The LM4846 is designed for cellular phone, PDA, and other
portable handheld applications. It delivers high quality output
power from a surface-mount package and requires only
seven external components in the OCL mode (two additional
components in SE mode).
Boomer
®
is a registered trademark of National Semiconductor Corporation.
2
C or a three-wire SPI com-
DS201668
Key Specifications
Features
n I
n I
n I
n Three independent volume channels (Left, Right, Mono)
n Eight distinct output modes
n micro SMD surface mount packaging
n “Click and Pop” suppression circuitry
n Thermal shutdown protection
n Low shutdown current (0.1uA, typ)
Applications
n Mobile Phones
n PDAs
j
j
j
j
to +18dB)
into 8Ω BTL (3.3V)
into 32Ω SE (3.3V)
2
2
2
THD+N at 1kHz, 500mW
THD+N at 1kHz, 30mW
Single Supply Operation (V
I
C/SPI Control Interface
C/SPI programmable National 3D Audio
C/SPI controlled 32 step digital volume control (-54dB
2
C/SPI Single Supply Operation
DD
)
www.national.com
2.7 to 5.5V
2.2 to 5.5V
1.0% (typ)
1.0% (typ)
July 2006

Related parts for LM4846TL/NOPB

LM4846TL/NOPB Summary of contents

Page 1

... It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode). Boomer ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications j THD+N at 1kHz, 500mW into 8Ω BTL (3.3V) ...

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Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit-Output Capacitor-less www.national.com 2 20166866 ...

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Typical Application (Continued) FIGURE 2. Typical Audio Amplifier Application Circuit-Single Ended 3 20166867 www.national.com ...

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Connection Diagrams 25-Bump micro SMD Top View Pin Descriptions Bump ...

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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage ESD Susceptibility (Note 3) ESD Machine model (Note 6) Junction Temperature ( Solder Information (Note 1) Electrical Characteristics 3.3V ...

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Electrical Characteristics 3.3V The following specifications apply for V Symbol Parameter Digital Volume Range (R and Mute Attenuation MONO_IN Input Impedance R and L Input Impedance Wake-Up Time from Shutdown WU www.national.com (Notes ...

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Electrical Characteristics 5.0V The following specifications apply for V Symbol Parameter I Supply Current DD I Shutdown Current SD V Output Offset Voltage OS P Output Power O Total Harmonic Distortion Plus THD+N Noise N Output Noise OUT Power Supply ...

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I C/SPI (Notes 2, 7) The following specifications apply for V Symbol Parameter Clock Period Clock Setup Time Data Hold Time 3 t Start Condition ...

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Typical Performance Characteristics THD+N vs Frequency V = 3.3V 8Ω Mode 1, BTL THD+N vs Frequency V = 3.3V 32Ω Mode 6, OCL THD+N vs Frequency V = ...

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Typical Performance Characteristics THD+N vs Frequency 8Ω Mode 1, BTL THD+N vs Frequency 32Ω Mode 4, SE THD+N vs Frequency V = 5V, R ...

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Typical Performance Characteristics THD+N vs Output Power V = 3.3V 8Ω 1kHz DD L Mode 1, BTL THD+N vs Output Power V = 3.3V 32Ω 1kHz DD L Mode 4, OCL THD+N ...

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Typical Performance Characteristics THD+N vs Output Power 8Ω 1kHz DD L Mode 1, BTL THD+N vs Output Power 32Ω 1kHz DD L Mode 4, OCL THD+N ...

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Typical Performance Characteristics PSRR vs Frequency V = 3.3V, 0dB DD Mode 4, OCL PSRR vs Frequency V = 3.3V, 0dB DD Mode 6, OCL PSRR vs Frequency V = 3.3V, 6dB DD Mode 1, BTL (Continued) PSRR vs Frequency ...

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Typical Performance Characteristics Noise V = 3.3V, Mode 4, OCL DD Noise V = 3.3V, Mode Noise V = 3.3V, Mode 1, BTL DD www.national.com (Continued 20166855 V = 3.3V, Mode 5, BTL DD 20166857 ...

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Typical Performance Characteristics Power Dissipation vs Output Power V = 3.3V 8Ω 1kHz, BTL, Mode 5 Power Dissipation vs Output Power V = 3.3V 32Ω 1kHz, OCL, Mode ...

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Typical Performance Characteristics Power Dissipation vs Output Power 8Ω 1kHz, BTL, Mode 5 Power Dissipation vs Output Power 32Ω 1kHz, OCL, Mode ...

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Typical Performance Characteristics Crosstalk vs Frequency V = 3.3V 32Ω Right-Left, OCL, Mode 6 Crosstalk vs Frequency V = 3.3V 32Ω Right-Left, SE, Mode 6 Supply Current vs ...

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Typical Performance Characteristics Supply Current vs Supply Voltage R = 32Ω, OCL, Mode 6 L Supply Current vs Supply Voltage R = 32Ω, SE, Mode 6 L Output Power vs Supply Voltage R = 8Ω, Mode 5 L www.national.com (Continued) ...

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Typical Performance Characteristics Output Power vs Supply Voltage R = 32Ω, OCL, Mode 6 L Output Power vs Supply Voltage R = 32Ω, SE, Mode 6 L (Continued) Output Power vs Supply Voltage R L 20166887 20166889 19 = 32Ω, ...

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Application Information PIN DESCRIPTION SDA: This is the serial data input pin. SCL: This is the clock input pin. ID_ENB: This is the address select input pin CSPI_SEL: This is tied LOW for I ...

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Application Information SPI DESCRIPTION CSPI_SEL: This pin is tied HIGH for SPI mode. 1. The data bits are transmitted with the MSB first. 2. The maximum clock rate is 1MHz for the CLK pin. 3. CLK must ...

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Application Information A7 A6 Chip 1 1 Address ID_ENB = ID_ENB = Mode Control 0 Programmable 3D 0 Mono Volume 1 Control Left Volume Control 1 Right Volume 1 Control 1. Bits ...

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Application Information Volume Step xVC4 xVC3 ...

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Application Information NATIONAL 3D ENHANCEMENT The LM4846 features a stereo headphone, 3D audio en- hancement effect that widens the perceived soundstage from a stereo audio signal. The 3D audio enhancement creates a perceived spatial effect optimized for stereo head- phone ...

Page 25

Application Information and reduced output power. Even with tightly regulated sup- plies, trace resistance creates the same effects as poor supply regulation. Therefore, making the power supply traces as wide as possible helps maintain full output voltage swing. BRIDGE CONFIGURATION ...

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Application Information LM4846’s supply pins and ground. Keep the length of leads and traces that connect capacitors between the LM4846’s power supply pin and ground as short as possible. Connect- ing a 2.2µF capacitor between the BYPASS pin ...

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Application Information LM4846 TL DEMO BOARD ARTWORK (Continued) Top Overlay Top Layer 27 20166806 20166805 www.national.com ...

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Application Information www.national.com (Continued) Bottom Layer 28 20166804 ...

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Revision History Rev 1.0 1.1 1.2 1.3 Date 11/10/05 1st WEB released. 12/21/05 Edited the X1, X2, and X3 in the mktg ouline, then re-released D/S 01/13/06 Added the Typ. Perf. curves, then released D/S to the WEB. 07/06/06 Added ...

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... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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