LM48410SQBD National Semiconductor, LM48410SQBD Datasheet - Page 12

• Manufacturer Part Number: LM48410SQBD
• Description: BOARD EVALUATION FOR LM48410SQ
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM48410SQBD

• Amplifier Type: Class D
• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 2.3W x 2 @ 4 Ohm
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM48410
• Lead Free Status / RoHS Status: Not applicable / Not applicable

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amplifier, there are two separate RC networks, one for each
stereo input pair (INL+ and INR+, and INL- and INR-). Set
3DEN high to enable the 3D effect. Set 3DEN low to disable
the 3D effect.
The 3D RC network acts as a high pass filter. The amount of
the 3D effect is set by the R
of R3D increases the 3D effect. The C
frequency at which the 3D effect occurs. Increasing the value
of C
the 3D effect over a wider bandwidth. The low frequency cut-
off point is given by:
Enabling the 3D effect increase the gain by a factor of (1
+20kΩ/R
6dB whenever the 3D effect is enabled. In fully differential
configuration, the component values of the two RC networks
must be identical. Any component variations can affect the
sound quality of the 3D effect. In single-ended configuration,
only the RC network of the input pairs being driven by the
audio source needs to be connected. For instance, if audio is
applied to INR+ and INL+, then a 3D network must be con-
3D
decreases the low frequency cutoff point, extending
3D
). Setting R
f
3D(–3dB)
3D
to 20kΩ results in a gain increase of
= 1 / 2
3D
resistor. Decreasing the value
π
(R
3D
)(C
3D
3D
capacitor sets the
FIGURE 2. Single-Ended Circuit Diagram
)
12
nected between 3DL+ and 3DR+. 3DL- and 3DR- can be left
unconnected.
AUDIO AMPLIFIER GAIN SETTING
The LM48410 features four internally configured gain set-
tings. The device gain is selected through the two logic inputs,
G0 and G1. The gain settings are as shown in the following
table.
SINGLE-ENDED AUDIO AMPLIFIER CONFIGURATION
The LM48410 is compatible with single-ended sources. When
configured for single-ended inputs, input capacitors must be
used to block and DC component at the input of the device.
Figure 2 shows the typical single-ended applications circuit.
G1
0
0
1
1
LOGIC INPUT
TABLE 1.
G0
300106a1
0
1
0
1
V/V
16
2
4
8
GAIN
dB
12
18
24
6