TDA7388 Amplifier
The TDA7388 is a class AB radio amplifier specifically designed for car radio applications. It offers several features that make it suitable for automotive audio systems. Here are the key specifications and pinout details:
- Specifications:
- Output Power: 4 x 45 W (maximum) at 4 Ω and 4 x 26 W at 14.4 V, 1 kHz, 10%
- Low Output Noise
- Standby Function
- Mute Function
- Low Distortion
- Operating Supply Voltage (VS): 18 V (DC)
- Peak Supply Voltage (VPK): 50 V (for 50 ms)
- Quiescent Current (IQ): 190 mA (typical)
- Output Power (PO): 26 W (typical) at VS = 14.4 V (THD = 10%)
- Maximum Power Output (Pmax): 41 W (at VS = 14.4 V), 45 W (at VS = 15.2 V)
- Total Harmonic Distortion (THD): 0.04% (at PO = 4 W)
- Pinout Configuration:
- 1: TAB (Connect to ground)
- 2: P-GND2 (Power ground of Channel 2)
- 3: OUT2- (Inverting Output of Channel 2)
- 4: ST-BY (Stand-by)
- 5: OUT2+ (Non-Inverting Output of Channel 2)
- 6: VCC (Supply Voltage)
- 7: OUT1- (Inverting Output of Channel 1)
- 8: P-GND1 (Power ground of Channel 1)
- 9: OUT1+ (Non-Inverting Output of Channel 1)
- 10: SVR (Supply Voltage Rejection)
- … (Continues for all pins)
- Application Circuit:
- The TDA7388 is a quad bridge amplifier, meaning it has four output channels where you can connect four speakers.
- The figure below illustrates the standard application circuit for the TDA7388: !TDA7388 Application Circuit
- Key components in the circuit:
- SVR Capacitor: Used for ripple rejection and governs turn ON/OFF sequence. Minimum recommended value: 10 μF.
- Mute Mode and Standby Mode: These modes can be directly controlled by connecting to the supply voltage (Vs).
- RC Cells: Used to smooth transitions and prevent audio noise.
- Muting and Standby Pins: Employ conventional/low-power transistors if true CMOS ports and microprocessors are absent.