TDA7057AQ integrated block internal box circuit

Published:2011/5/5 20:29:00 Author:TaoXi | Keyword: integrated block, internal box | From:SeekIC

1.Features The line oscillator and field oscillator's line oscillation frequency and field oscillation frequency of the TDA4857 can be changed by the line & field sync signal. The line oscillator's free oscillation frequency is 31.45kHz, the line frequency operating range is 50 to 130kHz, the field frequency operating range is 50 to 60Hz. This circuit's field excitation signal output is the differential output mode, that means this circuit outputs the rise field sawtooth wave and the down field sawtooth wave to drive the DC-coupled field output circuit. This circuit also has the soft-start function, the X-ray protection function and the +B switching power supply control circuit, the integrated block internal box circuit is as shown in figure 13. 2.Pin functions and data The pin functions and data of the TDA4857 is shown as the table 19, the waveform of the critical pin is as shown in figure 13. Table 19 The pin functions and data of the TDA4857



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Automotive_Circuit/TDA7057AQ_integrated_block_internal_box_circuit.html

Print this Page | Comments | Reading(3)