LM4850MTX/NOPB National Semiconductor, LM4850MTX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM4850MTX/NOPB
• Description: IC AMP AUDIO PWR 1.9W AB 14TSSOP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4850MTX/NOPB

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.9W x 1 @ 3 Ohm; 300mW x 2 @ 8 Ohm
• Voltage - Supply: 2.4 V ~ 5.5 V
• Features: Depop, Shutdown, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4850MTX; *LM4850MTX/NOPB; LM4850MTX

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I
V
P
V
V
I
I
V
P
V
V
Symbol
Symbol
SD
DD
SD
OS
O
IH
IL
OS
O
IH
IL
Electrical Characteristics
The following specifications apply for V
Electrical Characteristics
The following specifications apply for V
Note 3: Absolute Maximum Rating indicate limits beyond which damage to the device may occur.
Note 4: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and
test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may
degrade when the device is not operated under the listed test conditions.
Note 5: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 6: Typical specifications are specified at +25˚C and represent the most likely parametric norm.
Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8: Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200pF cap is charged to the specified voltage, then discharged directly into the
IC with no external series resistor (resistance of discharge path must be under 50Ω).
Note 9: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 10: The given θ
Note 11: When driving 3Ω or 4Ω loads from a 5V supply, the LM4850 must be mounted to a circuit board.
Note 12: Limits are guaranteed to National’s AOQL ( Average Outgoing Quality Level ).
External Components Description
(Refer to Figure 1.)
Components
1.
Shutdown Current
Output Offset Voltage
Output Power
Shutdown Input Voltage High
Shutdown Input Voltage Low
Supply Current
Shutdown Current
Output Offset Voltage
Output Power
Shutdown Input Voltage High
Shutdown Input Voltage Low
R
i
JA
Inverting input resistance which sets the closed-loop gain in conjunction with R
high pass filter with C
is for a LM4850LD with the Exposed-DAP soldered to an exposed 1in
Parameter
Parameter
DD
DD
i
= 3.3V, T
(Notes 3, 9)
= 2.7V, T
(Notes 3, 9) (Continued)
at f
SE Mode; V
SD Mode
BTL Mode; A
BTL OUT+ to BTL OUT−
BTL Mode; R
THD+N = 1%
SE Mode; R
THD+N = 1%
Is
Is
BTL Mode; V
SE Mode; V
SD Mode
BTL Mode; A
BTL OUT+ to BTL OUT−
BTL Mode; R
THD+N = 1%
SE Mode; R
THD+N = 1%
Is
Is
c
<
>
<
>
= 1/(2πR
80µA
0.5mA
80 µA
0.5mA
A
A
= 25˚C unless otherwise specified.
= 25˚C unless otherwise specified.
IN
IN
L
L
i
C
V
IN
V
L
L
= 32Ω
= 32Ω
i
).
= 0V; I
= 0V; I
= 2
= 8Ω
= 2
= 8Ω
= 0V; I
Conditions
Conditions
Functional Description
4
O
O
O
= 0A
= 0A
= 0A
2
area of 1oz printed circuit board copper.
(Note 6)
(Note 6)
Typical
Typical
440
300
2.0
5.0
1.8
1.8
5.0
30
40
25
25
LM4850
LM4850
f
. This resistor also forms a
(Note 7)
(Note 7)
Limit
Limit
2.0
0.8
2.0
0.8
40
40
(Limits)
(Limits)
V (max)
V (max)
V (min)
V (min)
Units
Units
mW
mW
mW
mW
mA
mV
mA
mA
mV
µA
µA