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MC33067DWG Scheda tecnica(PDF) 7 Page - ON Semiconductor |
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MC33067DWG Scheda tecnica(HTML) 7 Page - ON Semiconductor |
7 / 16 page MC34067, MC33067 http://onsemi.com 7 3 Figure 14. MC34067 Representative Block Diagram 12 Output B 13 14 8 7 Inverting Input Oscillator Control Current 16 9 8.0 V Q2 R RT CT ROSC COSC RVFO Vref 4.9V/3.6 V 15 VCC Enable / UVLO Adjust OSC Charge OSC RC One−Shot RC Error Amp Output Noninverting Input Soft−Start Ground 4 Fault Input Power Ground Output A Vref D1 Q1 IOSC Oscillator One−Shot Error Amp Clamp 3.1V Error Amp 9.0 mA 1.0 V Q Q T Steering Flip−Flop 4.2/4.0 V Vref UVLO VCC UVLO 7.0k 50k 7.0k 50k 4.9 V/3.6 V Vref 5.1 V Reference 1 2 6 11 5 10 Figure 15. Timing Diagram 5.1 V 3. 6 V COSC 5.1 V 3.6 V One−Shot Output A Output B tOS tOS tOS tOS tOS tOS High State Error Amp output, minimum IOSC current occurring at minimum input voltage, maximum load. Low State Error Amp output, maximum IOSC current occurring at maximum input voltage, minimum load. Fault Comparator IOSC Fault Latch S R Q |
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