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Details, datasheet, quote on part number:LM4876MX
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| Part: | LM4876MX |
| Category: | Multimedia => Audio => Amplifiers => Power Amplifiers => Boomer Audio Power Amplifiers |
| Description: | LM4876 - 1.1W Audio Power Amplifier With Logic Low Shutdown, Package: Soic Narrow, Pin Nb=8 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4876MX datasheet File size : 330 kB |
| Request For quote: | Find where to buy LM4876MX
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Datasheet text preview:
LM4876 1.1W Audio Power Amplifier with Logic Low Shutdown
March 2003
LM4876 1.1W Audio Power Amplifier with Logic Low Shutdown
General Description
The LM4876 is a single 5V supply bridge-connected audio power amplifier capable of delivering 1.1W (typ) of continuous average power to an 8 load with 0.5% THD+N. Like other audio amplifiers in the Boomer series, the LM4876 is designed specifically to provide high quality output power with a minimal amount of external components. The LM4876 does not require output coupling capacitors, bootstrap capacitors, or snubber networks. It is perfectly suited for lowpower portable systems. The LM4876 features an active low externally controlled, micro-power shutdown mode. Additionally, the LM4876 features an internal thermal shutdown protection mechanism. For PCB space efficiency, the LM4876 is available in MSOP and SO surface mount packages. The unity-gain stable LM4876's closed loop gain is set using external resistors.
Key Specifications
j THD+N at 1kHz for 1W continuous
average output power into 8
j Output power at 1kHz into 8
0.5% (max) 1.5W (typ) 0.01µA (typ) 2.0V to 5.5V
with 10% THD+N
j Shutdown current j Supply voltage range
Features
n Does not require output coupling capacitors, bootstrap capacitors, or snubber circuits n 10-pin MSOP and 8-pin SO packages n Unity-gain stable n External gain set
Applications
n n n n Mobile Phones Portable Computers Desktop Computers Low-Voltage Audio Systems
Typical Application
10129901
FIGURE 1. Typical LM4876 Audio Amplifier Application Circuit. Numbers in ( ) are specific to the 10-pin MSOP package
Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation
DS101299
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LM4876
Connection Diagrams
Mini Small Outline MSOP Package
10129925
Top View Order Number LM4876MM See NS Package Number MUB10A Small Outline SO Package
10129902
Top View Order Number LM4876M See NS Package Number M08A
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LM4876
Absolute Maximum Ratings
(Note 2)
Infrared (15 sec.) See AN-450 "Surface Mounting and their Effects on Product Reliability" for other methods of soldering surface mount devices. JC (typ) -- MUB10A JA (typ) -- MUB10A JC (typ) -- M08A JA (typ) -- M08A
220°C
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 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Soldering Information Small Outline Package Vapor Phase (60 sec.) 215°C 6.0V -65°C to +150°C -0.3V to VDD +0.3V Internally Limited 2500V 250V 150°C
56°C/W 210°C/W 35°C/W 140°C/W
Operating Ratings
Temperature Range TMIN TA TMAX Supply Voltage -40°C TA 85°C 2.0V VDD 5.5V
Electrical Characteristics (Notes 1, 2) The following specifications apply for VDD = 5V unless otherwise specified. Limits apply for TA = 25°C.
LM4876 Symbol VDD IDD ISD VOS Po Parameter Supply Voltage Quiescent Power Supply Current Shutdown Current Output Offset Voltage Output Power VIN = 0V, Io = 0A VPIN1 = 0V VIN = 0V THD = 0.5% (max); f = 1 kHz; RL = 8 THD+N = 10%; f = 1 kHz; RL = 8 THD+N PSRR Total Harmonic Distortion+Noise Power Supply Rejection Ratio Po = 1 Wrms; AVD = 2; 20 Hz f 20 kHz; RL = 8 VDD = 4.9V to 5.1V 6.5 0.01 5 1.10 1.5 0.25 65 Conditions Typical (Note 6) Limit (Note 7) 2.0 5.5 10.0 2 50 1.0 Units (Limits) V (min) V (max) mA (max) µA (max) mV (max) W (min) W % dB
Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions that guarantee specific performance limits. This assumes that the device operates within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given. The typical value, however, is a good indication of device performance. Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, JA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX TA)/JA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4876, TJMAX = 150°C. The typical junction-to-ambient thermal resistance is 140°C/W for the M08A package and 210°C/W for the MUB10A package. Note 4: Human body model, 100 pF discharged through a 1.5 k resistor. Note 5: Machine Model, 220 pF 240 pF discharged through all pins. Note 6: Typicals are measured at 25°C and represent the parametric norm. Note 7: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Electrical Characteristics VDD = 5/3.3/2.6V
LM4876 Symbol VIH VIL Parameter Shutdown Input Voltage High Shutdown Input Voltage Low Conditions Typical (Note 6) Limit (Note 7) 1.2 0.4 Units (Limits) V(min) V(max)
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