Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
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| LM4651 & LM4652 Overture Audio Power Amplifier 170W Class D Audio Power Amplifier Solution |
1980
Kbytes |
9-Jul-09 |
Download |
LM4651 & LM4652 Overture Audio Power Amplifier 170W Class D Audio Power Amplifier Solution (Japanese)
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475 Kbytes |
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General Description
The IC combination of the LM4651 driver and the LM4652 power MOSFET provides a high efficiency, Class D subwoofer amplifier
solution.
The LM4651 is a fully integrated conventional pulse width modulator driver IC. The IC contains short circuit, under voltage,
over modulation, and thermal shut down protection circuitry. The LM4651also contains a standby function which shuts down the
pulse width modulation minimizing supply current. The LM4652 is a fully integrated H-bridge power MOSFET IC in a TO-220 power
package. The LM4652 has a temperature sensor built in to alert the LM4651 when the die temperature of the LM4652 exceeds the
threshold. Together, these two IC's form a simple, compact high power audio amplifier solution complete with protection normally
seen only in Class AB amplifiers. Few external components and minimal traces between the IC's keep the PCB area small and
aids in EMI control.
The near rail-to-rail switching amplifier substantially increases the efficiency compared to Class AB amplifiers. This high
efficiency solution significantly reduces the heat sink size compared to a Class AB IC of the same power level. This two-chip
solution is optimum for powered subwoofers and self powered speakers.
[Information as of 8-Nov-2009]
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