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Details, datasheet, quote on part number:LM4841MHX
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| Part: | LM4841MHX |
| Category: | Multimedia => Audio => Amplifiers => Power Amplifiers => Boomer Audio Power Amplifiers |
| Description: | LM4841 - Stereo 2W Amplifiers With DC Volume Control, Transient Free Outputs, And Cap-less Headphone Drive, Package: Llp, Pin Nb=28 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4841MHX datasheet File size : 1166 kB |
| Request For quote: | Find where to buy LM4841MHX
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Datasheet text preview:
LM4841 Stereo 2W Amplifiers with DC Volume Control,Transient Free Outputs, and Cap-less Headphone Drive
August 2002
LM4841 Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive
General Description
The LM4841 is a monolithic integrated circuit that provides DC volume control and stereo bridged audio power amplifiers capable of producing 2W into 4 (Note 1) or 2.2W into 3 (Note 2) with less than 1.0% THD. The LM4841 uses advanced, latest generation circuitry to eliminate all traces of clicks and pops when the supply voltages is first applied. The amplifier has a headphoneamplifier-select input pin that is used to switch the amplifiers from bridge to single-ended mode for driving headphones. A new circuit topology eliminates headphone output coupling capacitors (patent pending). Boomer ® audio integrated circuits are designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4841 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4841 features an externally controlled, low-power consumption shutdown mode (Shutdown Low), and both a power amplifier and headphone mute for maximum system flexibility and performance.
Note 1: When properly mounted to the circuit board, LM4841MH and LM4841LQ will deliver 2W into 4. The LM4841MT will deliver 1.1W into 8. See the Application Information section for LM4841MH usage information. Note 2: An LM4841MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3.
Key Specifications
n PO at 1% THD+N n into 3 (MH and LQ) n into 4 ( MH and LQ) n into 8 (MT, MH, and LQ) n Single-ended THD+N at 85mW into 32 n Shutdown current 2.2W (typ) 2.0W (typ) 1.1W (typ) 1.0%(typ) 0.7µA (typ)
Features
n Stereo headphone amplifier mode that eliminates the Output Coupling Capacitors (patent pending) n Acoustically Enhanced DC Volume Control Taper n System Beep Detect n Stereo switchable bridged/single-ended power amplifiers n Selectable internal/external gain and bass boost n Advanced "click and pop" suppression circuitry n Thermal shutdown protection circuitry
Applications
n Portable and Desktop Computers n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs
Connection Diagrams
TSSOP Package
20028002
Top View Order Number LM4841MT or LM4841MH See NS Package Number MTC28 for TSSOP and MXA28A for Exposed-DAP TSSOP
Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2002 National Semiconductor Corporation
DS200280
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LM4841
Connection Diagrams
(Continued) LLP Package
20028097
Top View Order Number LM4841LQ See NS Package Number LQA028AA for Exposed-DAP LLP
Block Diagram
20028001
FIGURE 1. LM4841 Block Diagram
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LM4841
Absolute Maximum Ratings
(Note 10)
JC (typ) -- LQA028A JA (typ) -- LQA028A JC (typ) -- MTC28 JA (typ) -- MTC28 JC (typ) -- MXA28A JA (typ) -- MXA28A (exposed DAP) (Note 4) JA (typ) -- MXA28A (exposed DAP) (Note 3) JA (typ) -- MXA28A (exposed DAP) (Note 5) JA (typ) -- MXA28A (exposed DAP) (Note 6)
3°C/W 42°C/W 20°C/W 80°C/W 2°C/W 41°C/W 54°C/W 59°C/W 93°C/W
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 Power Dissipation (Note 11) ESD Susceptibility (Note 12) All pins except Pin 28 Pin 28 ESD Susceptibility (Note 13) Junction Temperature Soldering Information Small Outline Package Vapor Phase (60 sec.) Infrared (15 sec.) 2500V 6500V 200V 150°C 6.0V -65°C to +150°C -0.3V to VDD +0.3V Internally limited
Operating Ratings
215°C 220°C Temperature Range TMIN TA TMAX Supply Voltage -40°C TA 85°C 2.7V VDD 5.5V
See AN-450 "Surface Mounting and their Effects on Product Reliability" for other methods of soldering surface mount devices.
Electrical Characteristics for Entire IC (Notes 7, 10) The following specifications apply for VDD = 5V unless otherwise noted. Limits apply for TA = 25°C.
LM4841 Symbol VDD IDD ISD VIH VIL THum Parameter Supply Voltage Quiescent Power Supply Current Shutdown Current Headphone Sense High Input Voltage Headphone Sense Low Input Voltage Un-Mute Threshold Voltage Gain 1st Stage = 1 Vshutdown = VDD VIN applied to A or B input 22 VIN = 0V, IO = 0A Vshutdown = GND 15 0.7 4 0.8 10 40 Conditions Typical (Note 14) Limit (Note 15) 2.7 5.5 30 2.0 Units (Limits) V (min) V (max) mA (max) µA (max) V (min) V (max) mVrms mVrms
Electrical Characteristics for Volume Attenuators (Notes 7, 10)
The following specifications apply for VDD = 5V. Limits apply for TA = 25°C. LM4841 Symbol CRANGE Parameter Attenuator Range Conditions Gain with VDCVol = 5V, No Load Attenuation with VDCVol = 0V (BM & SE) AM Mute Attenuation Vmute = 5V, Bridged Mode (BM) Vmute = 5V, Single-Ended Mode (SE) Typical (Note 14) Limit (Note 15) Units (Limits) dB (max) dB (min) dB (min) dB (min)
± 0.75
-75 -78 -78
3
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