LM4873MT/NOPB National Semiconductor, LM4873MT/NOPB Datasheet - Page 6

• Manufacturer Part Number: LM4873MT/NOPB
• Description: IC AMP AUDIO PWR 3W STER 20TSSOP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4873MT/NOPB

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 3W x 2 @ 3 Ohm; 440mW x 2 @ 8 Ohm
• Voltage - Supply: 2 V ~ 5.5 V
• Features: Depop, Input Multiplexer, Shutdown, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4873MT; LM4873MT

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Electrical Characteristics for Single-Ended Operation
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 3Ω or 4Ω loads and operating on a 5V supply, the LM4873LQ must be mounted to a circuit board that has a minimum of 2.5in
uninterrupted copper area connected to the LLP package’s exposed DAP.
Typical Performance Characteristics
MTE (20-pin) and LQ (24-pin) Specific Characteristics
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.
THD+N vs Output Power
THD+N vs Output Power
LM4873MTE, LM4873LQ
LM4873MTE, LM4873LQ
Power Derating Curve
LM4873MTE (Note 21)
10099333
10099395
10099336
6
Power Dissipation vs Power Output
LM4873MTE, LM4873LQ
LM4873MTE, LM4873LQ
Power Derating Curve
THD+N vs Frequency
(Notes 3, 15) (Continued)
LM4873LQ
10099356
10099390
10099334
2
of exposed,