LM4901MMBD National Semiconductor, LM4901MMBD Datasheet - Page 5

• Manufacturer Part Number: LM4901MMBD
• Description: BOARD EVALUATION LM4901MM
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM4901MMBD

• Amplifier Type: Class AB
• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1.6W x 1 @ 4 Ohm
• Voltage - Supply: 2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM4901
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Electrical Characteristics V
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
25˚C. (Continued)
Note 12: The Exposed-DAP of the LDA10B package should be electrically connected to GND or an electrically isolated copper area. the LM4901LD demo board
(views featured in the Application Information section) has the Exposed-DAP connected to GND with a PCB area of 86.7mils x 585mils (2.02mm x 14.86mm) on
the copper top layer and 550mils x 710mils (13.97mm x 18.03mm) on the copper bottom layer.
Note 13: The thermal performance of the LLP package (LM4901LD) when used with the exposed-DAP connected to a thermal plane is sufficient for driving 4Ω
loads. The LM4901LD demo board (views featured in the Application Information section) can drive 4Ω loads at the maximum power dissipation point (1.267W)
without thermal shutdown circuitry being activated. The other available packages do not have the thermal performance necessary for driving 4Ω loads with a 5V
supply and are not recommended for this application.
External Components Description
Components
(Figure 1)
1.
2.
3.
4.
5.
C
C
R
C
R
S
B
i
i
f
Inverting input resistance which sets the closed-loop gain in conjunction with R
high pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a
highpass filter with R
for an explanation of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of External
Components, for information concerning proper placement and selection of C
i
i
at f
at f
c
C
= 1/(2π R
DD
= 1/(2π R
= 2.6V
i
i
C
C
i
i
). Refer to the section, Proper Selection of External Components,
).
Functional Description
(Notes 1, 2)
5
i
.
i
.
B
f
. This resistor also forms a
.
A
=
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