LM4842 National Semiconductor, LM4842 Datasheet - Page 6

• Manufacturer Part Number: LM4842
• Description: Stereo 2W Amplifiers with DC Volume Control Transient Free Outputs/ and Cap-less Headphone Drive
• Manufacturer: National Semiconductor

www.national.com
Electrical Characteristics for Bridged Mode Operation
Note 3: The θ
Note 4: The θ
through 21 8mil vias.
Note 5: The θ
Note 6: The θ
Note 7: All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical application as shown
in Figure 2.
Note 8: When driving 3Ω loads from a 5V supply the LM4842MH and LM4842LQ exposed DAP must be soldered to the circuit board and forced-air cooled.
Note 9: When driving 4Ω loads from a 5V supply the LM4842MH and LM4842LQ exposed DAP must be soldered to the circuit board.
Note 10: 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 which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 11: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
Note 12: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 13: Machine Model, 220 pF–240 pF discharged through all pins.
Note 14: Typicals are measured at 25˚C and represent the parametric norm.
Note 15: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level.) Datasheet min/max specification limits are guaranteed by design, test, or
statistical analysis.
JA
JA
JA
JA
given is for an MXA28A package whose exposed-DAP is soldered to an exposed 2in
given is for an MXA28A package whose exposed-DAP is soldered to a 2in
given is for an MXA28A package whose exposed-DAP is soldered to an exposed 1in
given is for an MXA28A package whose exposed-DAP is not soldered to any copper.
DMAX
= (T
JMAX
− T
A
)/θ
JA
. For the LM4842MT and LM4842LQ, T
6
2
piece of 1 ounce printed circuit board copper on a bottom side layer
JMAX
= 150˚C. See Power Dissipation for further information.
2
2
JMAX
piece of 1 ounce printed circuit board copper.
piece of 1 ounce printed circuit board copper.
, θ
JA
, and the ambient temperature T
(Notes 7, 10) (Continued)
A
. The maximum