LM4878IBP National Semiconductor, LM4878IBP Datasheet - Page 4

• Manufacturer Part Number: LM4878IBP
• Description: IC AMP AUDIO PWR 1W MONO 8USMD
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4878IBP

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm
• Voltage - Supply: 2 V ~ 5.5 V
• Features: Shutdown, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 8-MicroSMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4878IBP; *LM4878IBP/NOPB; LM4878IBPCT

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V
P
THD+N
PSRR
V
V
Symbol
Symbol
OS
0
IH
IL
Electrical Characteristics V
The following specifications apply for V
25˚C. (Continued)
Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2: 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 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
The typical junction-to-ambient thermal resistance is 150˚C/W.
Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5: Machine Model, 220 pF–240 pF discharged through all pins.
Note 6: Typicals are measured at 25˚C and represent the parametric norm.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: Low Voltage Circuit - See Fig. 4
Note 9: Shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I
Electrical Characteristics V
External Components Description
Components
(Figure 1)
1.
2.
3.
4.
5.
Output Offset Voltage
Output Power ( 8Ω )
Output Power ( 4Ω )
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Shutdown Input Voltage High
Shutdown Input Voltage Low
C
C
R
R
C
S
B
i
i
f
Inverting input resistance which sets the closed-loop gain in conjunction with R
high pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a
highpass filter with R
for an explanation of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External
Components, for information concerning proper placement and selection of C
Parameter
Parameter
DMAX
= (T
JMAX
–T
DD
i
A
i
)/θ
at f
at f
JA
= 2.6V and 8Ω Load unless otherwise specified. Limits apply for T
c
C
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4878, T
DD
= 1/(2π R
= 1/(2π R
DD
V
THD = 0.3% (max); f = 1 kHz THD
= 0.5% (max); f = 1 kHz
P
f ≤ 20 kHz
V
IN
o
DD
= 2.6V
= 0.25 Wrms; A
= 0V
= 5/3.3/2.6V Shutdown Input
= 2.5V to 2.7V
i
i
C
C
i
i
). Refer to the section, Proper Selection of External Components,
).
Conditions
Conditions
(Notes 1, 2, 8, 9)
Functional Description
4
VD
= 2; 20 Hz ≤
i
.
JMAX
, θ
JA
(Note 6)
Typical
Typical
, and the ambient temperature T
0.25
0.25
0.5
65
SD
5
by a maximum of 2µA.
i
.
LM4878
LM4878
B
f
. This resistor also forms a
.
(Note 7)
Limit
Limit
1.2
0.4
A
=
A
. The maximum
JMAX
mV (max)
(Limits)
(Limits)
V(max)
V(min)
Units
Units
= 150˚C.
dB
W
W
%