LM4838LQ/NOPB National Semiconductor, LM4838LQ/NOPB Datasheet - Page 6

• Manufacturer Part Number: LM4838LQ/NOPB
• Description: IC AMP AUDIO PWR 2.2W STER 28LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4838LQ/NOPB

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 2.2W x 2 @ 3 Ohm; 95mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Mute, Shutdown, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 28-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4838LQ; LM4838LQTR

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THD+N
PSRR
SNR
X
V
P
THD+N
PSRR
SNR
X
talk
OS
O
talk
Electrical Characteristics for Single-Ended Mode Operation
10) (Continued)
The following specifications apply for V
Symbol
Electrical Characteristics for Bridged Mode Operation
The following specifications apply for V
Symbol
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 1.
Note 8: When driving 3Ω loads from a 5V supply the LM4838LQ and LM4838MTE must be mounted to the circuit board and forced-air cooled.
Note 9: When driving 4Ω loads from a 5V supply the LM4838LQ, LM4838MTE, and LM4838GR must be mounted 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
can be found in the Absolute Maximum Ratings section above.
Note 12: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 13: Machine Model, 220pF – 240pF 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.
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
Channel Separation
Output Offset Voltage
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
Channel Separation
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.
Parameter
Parameter
DMAX
= (T
JMAX
− T
DD
DD
A
)/θ
= 5V. Limits apply for T
= 5V, unless otherwise noted. Limits apply for T
JA
. For the LM4838, T
V
A
C
V
P
Filter
f=1kHz, C
V
THD + N = 1.0%; f=1kHz; R
(Note 8)
THD + N = 1.0%; f=1kHz; R
(Note 9)
THD = 1% (max);f = 1 kHz;
R
THD+N = 10%;f = 1 kHz; R
P
R
P
C
V
V
A-Wtd Filter
f=1kHz, C
OUT
VD
RIPPLE
OUT
IN
O
O
RIPPLE
DD
B
L
L
B
= 8Ω
= 8Ω, A
= 1.0 µF, f =120 Hz,
= 1.0 µF, f = 120 Hz,
= 1W, 20 Hz
= 340 mW, R
= 0V, No Load
= 1
= 5V, P
= 1V
=75 mW, R
= 200 mVrms
= 200 mVrms; R
JMAX
B
B
RMS
VD
= 1.0 µF
= 1.0 µF
OUT
Conditions
Conditions
6
= 150˚C, and the typical junction-to-ambient thermal resistance for each package
= 2
, f=1kHz, R
A
<
= 1.1W, R
L
= 25˚C.
L
f
= 32Ω
= 32Ω, A-Wtd
<
2
20 kHz,
piece of 1 ounce printed circuit board copper on a bottom side layer
L
L
= 8Ω
L
= 10kΩ,
L
L
L
= 8Ω,
= 8Ω
= 3Ω
= 4Ω
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
(Note 14)
(Note 14)
A
Typical
Typical
(Notes 7, 10)
0.065
= 25˚C.
102
2.2
1.1
1.5
0.3
1.0
58
65
74
93
70
5
2
LM4838
LM4838
(Notes 7,
(Note 15)
(Note 15)
Limit
Limit
±
1.0
50
A
. The maximum
mV (max)
(Limits)
(Limits)
W (min)
Units
Units
dB
dB
dB
dB
dB
dB
W
W
W
%
%
%