IRAUDAMP8 International Rectifier, IRAUDAMP8 Datasheet - Page 17

• Manufacturer Part Number: IRAUDAMP8
• Description: BOX / 9999V 999.000A OTHER
• Manufacturer: International Rectifier

Specifications of IRAUDAMP8

• Lead Free Status / Rohs Status: Not Compliant

Gate Drivers and DirectFETs
The received PWM signal is sent to the dead-time generation block where a programmable
amount of dead time is added into the PWM signal between the two gate output signals of LO and
HO to prevent potential cross conduction across the output power DirectFETs. The high-side level-
shifter shifts up the high-side gate drive signal out of the dead-time block.
Each channel of the IRS2093’s drives two DirectFETs, high- and low-sides, in the power stage
providing the amplified PWM waveform.
Output LPF
The amplified PWM output is reconstructed back to an analog signal by the output LC LPF.
Demodulation LC low-pass filter (LPF) formed by L1 and C13, filters out the Class D switching
carrier signal leaving the audio output at the speaker load. A single stage output filter can be used
with switching frequencies of 400 kHz and greater; a design with a lower switching frequency may
require an additional stage of LPF.
Fig 15 Simplified Block Diagram of IRAUDAMP8 Class D Amplifier
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Page 17 of 34
IRAUDAMP8 REV
1.0