LM4851LQ/NOPB National Semiconductor, LM4851LQ/NOPB Datasheet - Page 6

• Manufacturer Part Number: LM4851LQ/NOPB
• Description: IC AMP AUDIO PWR 1.5W MONO 24LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4851LQ/NOPB

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.5W x 1 @ 4 Ohms; 115mW x 2 @ 32 Ohms
• Voltage - Supply: 2.6 V ~ 5 V
• Features: Depop, Shutdown, SPI, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4851LQ; LM4851LQ; LM4851LQNOPB; LM4851LQNOPBTR; LM4851LQNOPBTR; LM4851LQTR

www.national.com
Note 7: 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 8: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 9: The given θ
Note 10: Please refer to the Output Noise vs Output Mode table in the Typical Performance Characteristics section for more details.
External Components Description
Typical Performance Characteristics
Figure 1
Components
1.
2.
3.
C
C
C
THD+N vs Frequency (LM4851LQ)
in
B
s
JA
and θ
This is the input coupling capacitor. It blocks the DC voltage at, and couples the the input signal to, the
amplifier’s input terminals. C
This is the supply bypass capacitor. It provides power supply filtering.
This is the BYPASS pin capacitor. It provides half-supply filtering.
THD+N vs Frequency
JC
is for an LM4851 mounted on a demonstration board with a 4 in
i
, also creates a highpass filter with the internal resistor R
200408B4
20040863
Functional Description
6
2
area of 1oz printed circuit board copper ground plane.
THD+N vs Frequency (LM4851LQ)
THD+N vs Frequency
i
at f
c
= 1/(2πR
200408B5
20040864
i
C
i
).