Combination of the IC LM4651 driver and the LM4652 power MOSFET provides a high efficiency power amplifier solution. 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.
170Watt Amplifier BTL LM4651 & LM4652 schematicIC LM4651 is a integrated conventional pulse width modulator driver IC. The IC contains short circuit, under voltage, over modulation, and thermal shut down protection circuitry. The LM4651 also contains a standby function which shuts down the pulse width modulation minimizing supply current.
IC 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.
IC 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.
Absolute Maximum Ratings LM4651 & LM4652
- Supply Voltage ± 22V
- Output Current (LM4652) 10A
- Power Dissipation (LM4651) 1.5W
- Power Dissipation (LM4652) 32W
- ESD Susceptibility (LM4651) 2000V,
- ESD Susceptibility LM4652 (pins 2,6,10,11) 500V
- ESD Susceptibility (LM4651) (Note 5) 200V
- ESD Susceptibility LM4652 (pins 2,6,10,11) 100V
- Junction Temperature 150°C
- Soldering Information N, TA and TF Package (10 seconds) 260°C
- Storage Temperature −40°C to + 150°C
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