LM4840 datasheet(5/19 Pages) NSC

Part #	LM4840

Description	Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux

PDF	19 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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5 / 19 page

MH and LQ Specific Characteristics

Note 17: These curves show the thermal dissipation ability of the LM4840MH at different ambient temperatures given these conditions:

500LFPM + 2in2: The part is soldered to a 2in2, 1 oz. copper plane with 500 linear feet per minute of forced-air flow across it.

2in2on bottom: The part is soldered to a 2in2, 1oz. copper plane that is on the bottom side of the PC board through 21 8 mil vias.

2in2: The part is soldered to a 2in2, 1oz. copper plane.

1in2: The part is soldered to a 1in2, 1oz. copper plane.

Not Attached: The part is not soldered down and is not forced-air cooled.

Typical Performance Characteristics

LM4840MH, LM4840LQ

THD+N vs Output Power

DS200104-70

LM4840MH, LM4840LQ

THD+N vs Frequency

DS200104-71

LM4840MH, LM4840LQ

THD+N vs Output Power

DS200104-72

LM4840MH, LM4840LQ

THD+N vs Frequency

DS200104-73

LM4840MH, LM4840LQ

Power Dissipation vs Output Power

DS200104-65

LM4840MH(Note 17)

Power Derating Curve

DS200104-64

THD+N vs Frequency

DS200104-57

THD+N vs Frequency

DS200104-58

THD+N vs Frequency

DS200104-14

LM4840 Datasheet(PDF) 5 Page - National Semiconductor (TI)