LM49153TMEVAL National Semiconductor, LM49153TMEVAL Datasheet - Page 19

• Manufacturer Part Number: LM49153TMEVAL
• Description: EVAL BOARD LM49153
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM49153TMEVAL

• Amplifier Type: Class D
• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 145mW x 2 @ 16 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM49153
• Lead Free Status / Rohs Status: Lead free by exemption / RoHS compliant by exemption

NO CLIP/OUTPUT CLIP CONTROL
The LM49153 No Clip circuitry detects when the loudspeaker
output is near clipping and reduces the signal gain to prevent
output clipping and preserve audio quality
The LM49153 also features an output clip control that allows
a certain amount of clipping at the output in order to increase
the loudspeaker output power. The clip level is set by B2:B0
in the No Clip Control Register (see
works by allowing the output to enter clipping before the ALC
turns on and maintains the output level. The clip control has
Table
7). The clip control
FIGURE 4. Voltage Limit Output Level
(Figure
FIGURE 5. No Clip Function
5). Al-
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though the ALC reduces the gain of the speaker path to
prevent output clipping, it is still possible to overdrive the
speaker output. Please see the ALC Headroom section for
further details.
three levels: low, medium, and high. The low and high clip
level control settings give the lowest distortion and highest
distortion respectively on the output (see
FUNCTION). The actual output level of the device will depend
upon the supply voltage, and the output power will depend
upon the load impedance.
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