Details

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25-W STEREO CLASS-D AUDIO POWER AMPLIFIER

Parameter	Description	Min	Typ	Max	Unit
Supply Voltage (VDD)	Operating voltage range	4.5	-	18	V
Quiescent Current	Current consumption in standby mode	-	6	-	mA
Output Power (BTL)	Maximum output power into 4Ω load at 10% THD+N, VDD = 12V	-	25	-	W
Efficiency	Efficiency at 1kHz, 1W output, VDD = 12V	-	90	-	%
Signal-to-Noise Ratio (SNR)	SNR with A-weighting, VDD = 12V	100	-	-	dB
Total Harmonic Distortion + Noise (THD+N)	At 1kHz, 1W output, VDD = 12V	-	0.05	-	%
Input Sensitivity	Voltage required for full output, VDD = 12V	-	0.775	-	Vrms
Input Impedance	Input impedance at 1kHz	-	10	-	kΩ
Shutdown Current	Current consumption in shutdown mode	-	0.1	-	μA
Operating Temperature Range	Ambient temperature range	-40	-	85	°C
Storage Temperature Range	Temperature range for storage	-65	-	150	°C

Instructions:

1. Power Supply:

   • Ensure the supply voltage (VDD) is within the range of 4.5V to 18V.
   • Use a stable power source to avoid voltage fluctuations that could affect performance.

2. Quiescent Current:

   • The quiescent current is typically 6mA. This value should be considered when designing the power supply circuit to ensure efficient operation.

3. Output Power:

   • For maximum output power into a 4Ω load, use a supply voltage of 12V. The typical output power is 25W at 10% THD+N.

4. Efficiency:

   • The efficiency is typically 90% at 1kHz and 1W output with a 12V supply. This indicates good power conversion and minimal heat generation.

5. Signal-to-Noise Ratio (SNR):

   • The SNR is 100dB with A-weighting, ensuring high audio quality.

6. Total Harmonic Distortion + Noise (THD+N):

   • At 1kHz and 1W output, the THD+N is typically 0.05%, indicating low distortion and clean sound.

7. Input Sensitivity:

   • The input sensitivity is 0.775Vrms for full output at 12V supply. Ensure the input signal level is appropriate to avoid clipping or underdriving the amplifier.

8. Input Impedance:

   • The input impedance is 10kΩ at 1kHz, which is suitable for most audio sources.

9. Shutdown Current:

   • In shutdown mode, the current consumption drops to 0.1μA, which is beneficial for battery-powered applications.

10. Operating and Storage Temperature:

    • The operating temperature range is -40°C to 85°C, and the storage temperature range is -65°C to 150°C. Ensure the device is used within these limits to avoid damage.

11. PCB Layout:

    • Follow recommended PCB layout guidelines to ensure proper thermal management and minimize electromagnetic interference (EMI).

12. Capacitors:

    • Use high-quality capacitors for power supply decoupling and input coupling to maintain stability and performance.

13. Heat Sinking:

    • If operating at high power levels, consider using a heatsink to dissipate heat and prevent overheating.

14. Protection Circuits:

    • Implement overcurrent, overtemperature, and short-circuit protection circuits to safeguard the amplifier from potential faults.

(For reference only)