LM4804LQX/NOPB National Semiconductor, LM4804LQX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM4804LQX/NOPB
• Description: IC AMP AUDIO PWR 1.9W MONO 28LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4804LQX/NOPB

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1.9W x 1 @ 8 Ohm
• Voltage - Supply: 2.7 V ~ 6.1 V
• Features: Depop, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 28-LLP
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 1.9x1@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.13@8Ohm@1.5W%
• Single Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (typ): 3/5V
• Power Supply Requirement: Dual
• Power Dissipation: 1.8W
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 72dB
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): 2.7/3V
• Dual Supply Voltage (max): 5/6.1V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Package Type: LLP EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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TSD
P
THD+N
e
PSRR
V
OS
OUT
FB
Electrical Characteristics V
The following specifications apply for V
= 78.7kΩ unless otherwise specified. Limits apply for T
Note 1: All voltages are measured with respect to the GND 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
Note 4: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 5: Machine Model, 220pF – 240pF 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: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9: Shutdown current is measured in a normal room environment. The Shutdown pin should be driven as close as possible to V
current.
Note 10: Shutdown current is measured with components R1 and R2 removed.
Note 11: Feedback pin reference voltage is measured with the Audio Amplifier disconnected from the Boost converter (the Boost converter is unloaded).
Symbol
Thermal Shutdown Temperature
Output Power
Total Harmomic Distortion + Noise
Output Noise
Power Supply Rejection Ratio
Feedback Pin Reference Voltage
DMAX
Parameter
= (T
JMAX
− T
DD
A
) / θ
= 3.0V, V
JA
DD
or the given in Absolute Maximum Ratings, whichever is lower.
= 3.0V
1
= 6.0V, A
THD = 2% (max)
P
A-Weighted Filter, V
Input Referred
V
f = 217Hz
f = 1kHz
(Note 11)
A
OUT
RIPPLE
= 25˚C.
= 1.5W
(Notes 1, 2) (Continued)
= 200mV
4
V-BTL
Conditions
= 20dB, R
p-p
IN
= 0V,
L
JMAX
= 8Ω, f
, θ
JA
IN
, and the ambient temperature, T
= 1kHz, C
(Note 6)
Typical
0.15
1.24
1.8
30
73
66
LM4804
B
= 1.0µF, R
(Notes 7, 8)
1.2772
1.2028
in
Limit
1.65
125
for minimum shutdown
0.5
1
A
. The maximum
= 301kΩ, R
˚C (min))
dB (min)
(Limits)
W (min)
V (max)
V (min)
Units
µV
%
2