PAM8010

Document number: DSxxxxx Rev. 1 - 0

12 of 17

www.diodes.com

November 2012

© Diodes Incorporated

PAM8010

A Product Line of

Diodes Incorporated

Application Information

Test Setup for Performance Testing (Class D)

1. When the PAM8010 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 PAM8010 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 PAM8010 operation voltage is 6.0V. When the PAM8010 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 PAM8010 has big gain, it will make the device damaged.

5. When testing the PAM8010 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.

Power Limit Function

from Pin 7 to ground (see the application circuit on Page 1).

Different from other company’s power limit, the power limit circuit of PAM8010 sets a limit on the output peak voltage, and the value is lower

Noise Reduction Function

The gain of PAM8010 will reduce 12dB when there is no audio at the input of the amplifier for 8s. The gain will recovered until the input signal is

Mute Operation

The MUTE_D pin is an input for controlling the Class-D output state of the PAM8010. A logic low on this pin enables the outputs, and a logic

high on this pin disables the outputs. This pin may be used as a quick disable or enable of the outputs without a volume fade. Quiescent current

is listed in the electronics characteristics table. The MUTE_D pin can be left floating due to the internal pull-down.

The MUTE_AB pin is an input for controlling the Class-AB output state of the PAM8010. A logic high on this pin enables the outputs, and a logic

low on this pin disables the outputs.

Shutdown Operation

In order to reduce power consumption while not in use, the PAM8010 contains shutdown circuitry to turn off the amplifier’s bias circuitry. The

amplifier is turned off when logic low is placed on the SHDN pin. By switching the SHDN pin connected to GND, the PAM8010 supply current

draw will be minimized in idle mode. The SHDN pin can be left floating due to the internal pull-up.

For the best power on/off pop performance, the amplifier should be placed in the Mute mode prior to turning on/off the power supply.