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11 W Stereo or 22 W Mono Power Amp - Coordinated AF power amps have seen incredible changes lately offering enhanced force and less demanding use. The TDA1519C from Philips contains two force intensifiers giving 11 W for every channel stereo or 22 W mono when the two diverts are joined in a scaffold configuration. The extraordinary in-line SIL9P bundle framework permits the chip to be helpfully dashed to a suitable heatsink. The TDA1519CSP is the SMD variant, for this situation the warmth sink is mounted over, and in contact with, the top surface of the chip.

The working voltage of this gadget is from +6V to +17.5V. The two channels of the speaker are distinctive in that one channel, between pins 1 and 4, is a non-rearranging enhancer, while the other between pins 9 and 6 is a modifying intensifier. It is in this manner fundamental in stereo operation, to wire the speakers so that one of them has its extremity turned around. Every intensifier has an information impedance of 60kω and a voltage increase of 40dB, i.e. 100 times. At the point when both intensifier are utilized as a part of a scaffold configuration, the inputs are in parallel so that the data impedance will be 30kω.

A joined quiet/standby capacity is given on pin 8. In its least difficult structure this can be joined with the positive rail through a switch. At the point when the switch is open the enhancer will be in standby mode and current utilization is under 100µA. At the point when the switch is shut, the speaker will be operational. A circuit is additionally demonstrated that uses the quiet data to keep the irritating switch-on thud heard when power amps are first exchanged on This is brought about by the surge of current to charge capacitors C1 and C2.

The circuit indicated produces a slope voltage, which is connected to stick 8. At switch on, as the voltage ascends from 3.3 V to 6.4 V, the enhancer will change out of standby mode and into quiet mode permitting C1 and C2 to charge. Just when the incline voltage on pin 8 comes to 8.5V will the speaker switch into dynamic mode. Insurance incorporated with the TDA1519C would appear to make it verging on secure. The two yields can be shorted to both of the supply rails and to one another.