E-TDA7377

The TDA7377 is a new technology class AB car radio amplifier able to work either in DUAL BRIDGE or QUAD SINGLE ENDED configuration. The exclusive fully complementary structure of the output stage and the internally fixed gain guarantees the highest possible power performances with extremely reduced component count. The on - board clip detector simplifies gain compression operation. The fault diagnostics makes it possible to detect mistakes during car radio set assembly and wiring in the car.

Key features

• HIGH OUTPUT POWER CAPABILITY: 2 x 37W max./4Ω 2 x 24W/4Ω @14.4V, 1KHz, 10% 4 x 7W/4Ω @14.4V, 1KHz, 10% 4 x 11.5W/2Ω @14.4V, 1KHz, 10%
• MINIMUM EXTERNAL COMPONENTS COUNT:
• NO BOOTSTRAP CAPACITORS
• NO BOUCHEROT CELLS
• INTERNALLY FIXED GAIN (26dB BTL)
• ST - BY FUNCTION (CMOS COMPATIBLE)
• NO AUDIBLE POP DURING ST - BY OPERATIONS
• DIAGNOSTICS FACILITY FOR:
• CLIPPING
• OUT TO GND SHORT
• OUT TO VS SHORT
• SOFT SHORT AT TURN - ON
• THERMAL SHUTDOWN PROXIMITY
• Protections:
• OUPUT AC/DC SHORT CIRCUIT
• TO GND
• TO VS
• ACROSS THE LOAD
• SOFT SHORT AT TURN - ON
• OVERRATING CHIP TEMPERATURE WITH SOFT THERMAL LIMITER
• LOAD DUMP VOLTAGE SURGE
• VERY INDUCTIVE LOADS
• FORTUITOUS OPEN GND
• REVERSED BATTERY ESD
• High Application Flexibility: The availability of 4 independent channels makes it possible to accomplish several kinds of applications ranging from 4 speakers stereo (F/R) to 2 speakers bridge solutions.
• Easy Single Ended to Bridge Transition: The change from single ended to bridge configurations is made simply by means of a short circuit across the inputs, that is no need of further external components.
• Gain Internally Fixed to 20dB in Single Ended, 26dB in Bridge: Advantages of this design choice are in terms of components and space saving, output noise, supply voltage rejection and distortion optimization.
• Silent Turn On/Off and Muting/Stand - by Function: The stand - by can be easily activated by means of a CMOS level applied to pin 7 through a RC filter. Under stand - by condition the device is turned off completely (supply current = 1μA typ.; output attenuation = 80dB min.). Every ON/OFF operation is virtually pop free. Furthemore, at turn - on the device stays in muting condition for a time determined by the value assigned to the SVR capacitor. While in muting the device outputs becomes insensitive to any kinds of signal that may be present at the input terminals. In other words every transient coming from previous stages produces no unplesant acoustic effect to the speakers.
• Rail - to - Rail Output Voltage Swing With No Need of Bootstrap Capacitors. The output swing is limited only by the VCEsat of the output transistors, which is in the range of 0.3Ω (Rsat) each.
• Absolute Stability Without Any External Compensation.