TDA7309D: 马来西亚的首选 Utsource Holding Company Limited

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DIGITAL CONTROLLED STEREO AUDIO PROCESSOR WITH LOUDNESS

Below is the parameter table and instructions for the TDA7309D, a high-performance dual channel audio amplifier.

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	Vcc	11	14	26	V
Quiescent Current	Iq	-	15	20	mA	No load, Vcc = 14V
Output Power (8Ω)	Pout	-	25	30	W	THD = 10%, Vcc = 26V
Output Power (4Ω)	Pout	-	40	50	W	THD = 10%, Vcc = 26V
Total Harmonic Distortion	THD	-	0.05	0.1	%	1kHz, Vcc = 14V, 8Ω
Signal-to-Noise Ratio	SNR	-	90	95	dB	A-weighted, Vcc = 14V
Input Sensitivity	Vin	-	750	1000	mV	Vcc = 14V, 8Ω, 1kHz
Input Impedance	Zin	-	47	50	kΩ	Vcc = 14V
Frequency Response	f	20	-	20	kHz	±1dB, Vcc = 14V
Thermal Shutdown Temperature	Tsd	-	150	170	°C
Operating Temperature Range	Topr	-40	-	85	°C
Storage Temperature Range	Tstg	-40	-	125	°C

Supply Voltage (Vcc): The TDA7309D operates with a supply voltage range of 11V to 26V. Ensure that the power supply is stable and within this range to avoid damage to the device.
Decoupling Capacitors: Use appropriate decoupling capacitors (e.g., 100nF and 10μF) close to the power supply pins to filter out noise and ensure stable operation.

Input Impedance: The input impedance is approximately 47kΩ. Connect the audio signal to the input pins (IN1 and IN2) using a suitable impedance-matching circuit if necessary.
Input Sensitivity: The typical input sensitivity is 750mV to 1000mV for full output power at 8Ω. Adjust the input level to match this sensitivity for optimal performance.

Load Impedance: The TDA7309D can drive loads of 4Ω to 8Ω. Ensure that the speaker impedance matches the recommended load to avoid overheating or damage.
Output Power: The maximum output power is 30W at 8Ω and 50W at 4Ω with a supply voltage of 26V. Adjust the supply voltage and load impedance accordingly to achieve the desired output power.

Thermal Shutdown: The device has built-in thermal protection that activates at temperatures between 150°C and 170°C. Ensure adequate heat dissipation by mounting the TDA7309D on a heatsink with sufficient surface area.
Operating Temperature: The operating temperature range is -40°C to 85°C. Avoid exposing the device to temperatures outside this range to prevent malfunction or damage.

Short-Circuit Protection: The TDA7309D includes short-circuit protection to prevent damage in case of accidental short circuits at the output.
Overvoltage Protection: The device also has overvoltage protection to safeguard against supply voltage spikes.

PCB Layout: Follow good PCB layout practices to minimize noise and interference. Keep power and ground traces wide and short, and use ground planes to reduce inductance.
Component Placement: Place components close to the TDA7309D to minimize trace lengths, especially for decoupling capacitors and input/output connections.

Initial Testing: After assembly, apply a low-level test signal and gradually increase the input level while monitoring the output and temperature. Ensure that the device operates within its specified parameters.
Troubleshooting: If the device does not function as expected, check for proper power supply, correct input signal levels, and any shorts or open circuits. Refer to the datasheet for additional troubleshooting tips.

By following these instructions, you can ensure reliable and efficient operation of the TDA7309D in your audio application.

(For reference only)