IRAUDAMP8 International Rectifier, IRAUDAMP8 Datasheet - Page 25

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

Specifications of IRAUDAMP8

• Lead Free Status / Rohs Status: Not Compliant

Load Impedance
Each channel is optimized for a 4 Ω speaker load in half bridge.
Input Signal and Gain Setting
A proper input signal is an analog signal ranging from 20Hz to 20kHz with up to 3 V
amplitude
RMS
with a source impedance of no more than 600 Ω. Input signal with frequencies from 30kHz to
60kHz may cause LC resonance in the output LPF, causing a large reactive current flowing
through the switching stage, especially with greater than 8 Ω load impedances, and the LC
resonance can activate OCP.
The IRAUDAMP8 has an RC network called a Zobel network (R21 and C14) to damp the
resonance and prevent peaking frequency response with light loading impedance. (Fig 21)
Fig 21 Output Low Pass Filter and Zobel Network
Gain Setting
The ratio of resistors R4A~D/R1A~D in Fig 22 sets voltage gain. The IRAUDAMP8 has no on board volume
control. To change the voltage gain, change the input resistor term R1A~D. Changing R4A~D affects PWM
control loop design and may result poor audio performance.
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IRAUDAMP8 REV
1.0