3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Applications Circuit

Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)

These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All

voltages are with respect to ground.

Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)

Thermal Information

Electrical Characteristics (@TA = +25°C, VCC = 12V, RL =8Ω, MAX Gain, unless otherwise specified.)

Typical Performance Characteristics

(VCC = 12, RL = 8Ω, GV = 32dB, TA = +25°C, VCC = 15V, RL =8Ω, unless otherwise specified.)

Application Information

Test Setup for Performance Testing

Notes: 4. The AP AUX-0025 low pass filter is necessary for class-D amplifier measurement with AP analyzer.

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

power. The SD input terminal should be held high during normal operation when the amplifier is in use. Pulling SD low causes the outputs to

mute and the amplifier to enter a low-current state. SD should never be left unconnected to prevent the amplifier from unpredictable operation.

For the best power-off pop performance, the amplifier should be set in shutdown mode prior to removing the power supply voltage.

Internal 2.5V Bias Generator Capacitor Selection

The internal 2.5V bias generator (V2P5) provides the internal bias for the preamplifier stage. The external input capacitors and this internal

reference allow the inputs to be biased within the optimal common-mode range of the input preamplifiers.

The selection of the capacitor value on the V2P5 terminal is critical for achieving the best device performance. During startup or recovery from

Power Supply Decoupling, CS

The PAM8106 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic

distortion (THD) as low as possible. Power supply decoupling also prevents ringing oscillations caused by long lead between the amplifier and

the speaker. The optimum decoupling is achieved by using two capacitors of different types that target different types of noise on the power

supply leads. For higher frequency transients, spikes, or digital hash on the line, a good low equivalent-series resistance (ESR) ceramic

capacitor, typically X7R type 1μF, is recommended, placing as close as possible to the device’s VCC lead. To filter lower frequency noises, a

large aluminum electrolytic capacitor of 10μF or greater is recommended, placing near the audio power amplifier. The 10μF capacitor also

serves as a local storage capacitor for supplying current during large signal transients on the amplifier outputs.

VCLAMP Capacitors

To ensure that the maximum gate-to-source voltage for the NMOS output transistors not exceeded, an internal regulators are used to clamp the

gate voltage. A 1μF capacitors must be connected from VCLAMP to ground and must be rated for at least 25V. The voltages at the VCLAMP

terminals vary with VCC and may not be used to power any other circuitry.

Internal Regulated 5-V Supply (AVDD)

The AVDD terminal is the output of an internally generated 5V supply, used for the oscillator, amplifier, power limit circuitry and logic control

circuitry. It requires a 0.1μF to 1μF capacitor, placed very close to the pin to ground to keep the regulator stable. The regulator may not be used

at the device input for best noise performance.

Using Low-ESR Capacitors

resistor in series with an ideal capacitor. The voltage drop across this resistor minimizes the beneficial effects of the capacitor in the circuit. The

lower the equivalent value of this resistance the more the real capacitor behaves as an ideal capacitor.

Short-Circuit Protection

The PAM8106 has short circuit protection circuitry on the outputs to prevent damage to the device when output-to-output shorts, output-to-GND

shorts, or output-to-VCC shorts occur. Once a short-circuit is detected on the outputs, the output drive is immediately disabled. This is a latched

state and the outputs are disabled. This is not a latched fault. The thermal fault is cleared once the temperature of the die is reduced by 50°C.

The device begins normal operation at this point without external system intervention.

Spread Spectrum Modulation

The PAM8106 has built in Spread spectrum modulation control of the oscillator frequency to improve EMI performance, while removing the need

to use expensive inductance in the audio output path. The spread spectrum feature can be enabled by setting a Logic-Low to SSMCTL pin, or

disabled by setting a Logic-High to SSMCTL pin.

Power Limit

The voltage at PL pin can used to limit the power to levels below that which is possible based on the supply rail. Add a resistor from PL to ground

System test set up: VCC = 12V, RLOAD = 8Ω, sine wave 1Khz, AVdd=5.2V