LM4913 datasheet(5/15 Pages) NSC

5 / 15 page

Electrical Characteristics: Bridged-Mode Operation (V

DD = 3V)

(Notes 4, 9)

The following specifications apply for the circuit shown in Figure 1, R

L =4

Ω, and a measurement bandwidth of 20Hz to

80kHz, unless otherwise specified. Limits apply for T

A = 25˚C.

Symbol

Parameter

Conditions

LM4913

Units

(Limits)

Typical

Limit

(Note 9)

(Notes 10,

11)

Output Power (Note 11)

THD = 1% (max); f = 1kHz (Note

12)

L =4

Ω (THD = 0.1%)

660

THD+N

Total Harmonic Distortion + Noise

f = 1kHz

L =4

Ω,P

O = 500mW

0.2

Output Voltage Noise

B = 0.47µF, 20Hz < f < 20kHz

µV

RMS

Electrical Characteristics: SE Operation (V

DD = 3V)

(Notes 4, 9)

The following specifications apply for the circuit shown in Figure 1, R

L =4

Ω, and a measurement bandwidth of 20Hz to

80kHz, unless otherwise specified. Limits apply for T

A = 25˚C.

Symbol

Parameter

Conditions

LM4913

Units

(Limits)

Typical

Limit

(Note 9)

(Notes 10,

11)

Output Power (Note 11)

THD+N = 0.1%, f = 1kHz, R

L =

Ω

THD+N

Total Harmonic Distortion + Noise

f = 1kHz

L =32

Ω,P

O = 30mW

0.1

Output Voltage Noise

B = 0.47µF, 20Hz < f < 20kHz

µV

RMS

Note 2: An LM4913MH that has been properly mounted to a circuit board with a copper heatsink area of at least 2in2 will deliver 2.1W into 4

Ω.

Note 3: All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 4: 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 5: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum

allowable power dissipation is PDMAX =(TJMAX–TA)/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4913, see power derating

curves for additional information.

Note 6: Human body model, 100pF discharged through a 1.5k

Ω resistor.

Note 7: Machine Model, 220pF–240pF discharged through all pins.

Note 8: The given

θJA is for an LM4913 packaged in an MXF10A with the Exposed-DAP soldered to an exposed 2in2 area of 1oz printed circuit board copper.

Note 9: Typicals are measured at 25˚C and represent the parametric norm.

Note 10: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 11: Datasheet minimum and maximum specification limits are guaranteed by design, test, or statistical analysis.

Note 12: Output power is measured at the amplifier’s package pins.

Note 13: When driving 4

Ω loads and operating on a 5V supply, the LM4913MH must be mounted to a circuit board that has a minimum of 2.5in2 of exposed,

uninterrupted copper area connected to the MH package’s exposed DAP.

Note 14: See Application Information section "Single-Ended Output Power Performance and Measurement Considerations" for more information.

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