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LM4873 Datasheet(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4873
Description  Dual 2.1W Audio Amplifier Plus Stereo Headphone Function
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM4873 Datasheet(HTML) 6 Page - National Semiconductor (TI)

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Electrical Characteristics for Single-Ended Operation (Notes 3, 15) (Continued)
Note 18: The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 19: Output power is measured at the device terminals.
Note 20: When driving 3
Ω or 4Ω loads and operating on a 5V supply, the LM4873LQ must be mounted to a circuit board that has a minimum of 2.5in2 of exposed,
uninterrupted copper area connected to the LLP package’s exposed DAP.
Typical Performance Characteristics
MTE (20-pin) and LQ (24-pin) Specific Characteristics
LM4873MTE, LM4873LQ
THD+N vs Output Power
LM4873MTE, LM4873LQ
THD+N vs Frequency
10099333
10099334
LM4873MTE, LM4873LQ
THD+N vs Output Power
LM4873MTE, LM4873LQ
Power Dissipation vs Power Output
10099336
10099390
LM4873MTE (Note 21)
Power Derating Curve
LM4873LQ
Power Derating Curve
10099395
10099356
Note 21: This curve shows the LM4873MTE’s and the LM4873LQ’s thermal dissipation ability at different ambient temperatures given these conditions:
500LFPM + JEDEC board: The part is soldered to a 1S2P 20-lead exposed-DAP TSSOP test board with 500 linear feet per minute of forced-air flow across it.
Board information - copper dimensions: 74x74mm, copper coverage: 100% (buried layer) and 12% (top/bottom layers), 16 vias under the exposed-DAP.
www.national.com
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