PAM8007

Document number: DSxxxxx Rev. 1 - 2

13 of 17

www.diodes.com

October 2012

© Diodes Incorporated

PAM8007

A Product Line of

Diodes Incorporated

Test Setup for Performance Testing (Class D)

1. When the PAM8007 works with LC filters, it should be connected with the speaker before it's powered on, otherwise it will be damaged

easily.

2. When the PAM8007 works without LC filters, it's better to add a ferrite chip bead at the outgoing line of speaker for suppressing the possible

electromagnetic interference.

3. The absolute maximum rating of the PAM8007 operation voltage is 6.0V. When the PAM8007 is powered with four battery cells, it should be

noted that the voltage of four new dry or alkaline batteries is over 6V, higher than its maximum operation voltage, which probably make the

device damaged. Therefore, it's recommended to use either four Ni-MH (Nickel Metal Hydride) rechargeable batteries or three dry or alkaline

batteries.

4. The input signal should not be too high, if too high, it will cause the clipping of output signal when increasing the volume. Because the DC

volume control of the PAM8007 has big gain, it will make the device damaged.

5. When testing the PAM8007 without LC filters by using resistor instead of speaker as the output load, the test results, e.g. THD or efficiency,

will be worse than those using speaker as load.

Notes:

1. The Audio Precision (AP) AUX-0025 low pass filter is necessary for class-D amplifier measurement with AP analyzer.

2. Two 22μH inductors are used in series with load resistor to emulate the small speaker for efficiency measurement.