LM4918LQ/NOPB National Semiconductor, LM4918LQ/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM4918LQ/NOPB
• Description: IC AMP AUDIO PWR 1.1W STER 32LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4918LQ/NOPB

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 1.1W x 2 @ 8 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Mute, Shutdown, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 32-LLP
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 1.1x2@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.3@8Ohm@1W%
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 67dB
• Single Supply Voltage (min): 2.7V
• 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: 32
• Package Type: LLP EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4918LQ

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.
, θ
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
, and the ambient temperature T
. The maximum
JMAX
JA
A
allowable power dissipation is P
= (T
–T
)/θ
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4918, see power derating
DMAX
JMAX
A
JA
curves for additional information.
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: R
is measured from the output pin to ground. This value represents the parallel combination of the 10kΩ output resistors and the two 20kΩ resistors.
OUT
Note 10: If the product is in Shutdown mode and V
exceeds 6V (to a max of 8V V
), then most of the excess current will flow through the ESD protection circuits.
DD
DD
If the source impedance limits the current to a max of 10mA, then the device will be protected. If the device is enabled when V
is greater than 5.5V and less than
DD
6.5V, no damage will occur, although operation life will be reduced. Operation above 6.5V with no current limit will result in permanent damage.
Note 11: Maximum power dissipation in the device (P
) occurs at an output power level significantly below full output power. P
can be calculated using
DMAX
DMAX
Equation 1 shown in the Application Information section. It may also be obtained from the power dissipation graphs.
Note 12: Data taken at VagcRef = V
and Power Amp Gain set to A = 2.
DD
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