LM4884MHX/NOPB National Semiconductor, LM4884MHX/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM4884MHX/NOPB
• Description: IC AMP AUDIO 2.6W STER 20TSSOP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4884MHX/NOPB

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 2.6W x 2 @ 3 Ohm
• Voltage - Supply: 3 V ~ 5.5 V
• Features: Depop, Differential Inputs, Shutdown, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 2.6x2@3OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.3@4Ohm@2W%
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 62dB
• Single Supply Voltage (min): 3V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Package Type: TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4884MHX

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Electrical Characteristics for LM4884
Note 1: An LM4884MH that has been properly mounted to a circuit board with a copper heatsink area of at least 2in
Note 2: All voltages are measured with respect to the GND pin unless other wise specified.
Note 3: 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 that
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 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θ
allowable power dissipation is P
currents for more information.
Note 5: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 6: Machine Model, 220pF-240pF discharged through all pins.
Note 7: The given θ
driving 4Ω loads from a 5V supply, the LM4884MH must be mounted to the circuit board and its exposed-DAP soldered to an exposed 2in
Note 8: Typicals are measured at 25˚C and represent the parametric norm.
Note 9: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 10: Datasheet minimum and maximum specification limits are guaranteed by design, test, or statistical analysis.
Note 11: Output power is measured at the amplifier’s package pins.
Note 12: When driving 3Ω or 4Ω loads and operating on a 5V supply, the LM4884MH must be mounted to a circuit board that has a minimum of 2in
uninterrupted copper area connected to the MH package’s exposed DAP.
External Components Description
See Figure 1.
Components
1.
2.
3.
C
C
C
S
B
i
JA
The input coupling capacitor blocks DC voltage at the amplifier’s inverting input terminals. C
LM4884’s variable input resistance R
inverting and noninverting inputs require a C
EXTERNAL COMPONENTS, for an explanation of determining the value of C
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for information about
properly placing, and selecting the value of, this capacitor.
The capacitor, C
Information section, SELECTING EXTERNAL COMPONENTS, for information concerning proper placement
and selecting C
is for an LM4884 packaged in an MXA20A with the exposed-DAP soldered to an exposed 2in
DMAX
= (T
JMAX
B
B
’s value.
, filters the half-supply voltage present on the BYPASS pin. Refer to the Application
- T
A
/θ
JA
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4884, see power derating
1
(See Table 1), creates a highpass filter with f
Functional Description
i
. Refer to the Application Information section, SELECTING
(Notes 2, 8) (Continued)
4
JA
, and the ambient temperature, T
2
area of 1oz printed circuit board copper. When
2
will deliver 1.9W into 4Ω or 2.1W into 3Ω.
i
.
C
= 1/(2πR
2
area of 1oz PCB copper.
i
, along with the
i
C
i
A
). Both
. The maximum
2
of exposed,