MC33067DWG データシートの表示（PDF） - ON Semiconductor

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MC33067DWG

(MC33067 / MC34067) HIGH PERFORMANCE ZERO VOLTAGE SWITCH RESONANT MODE CONTROLLERS

ON Semiconductor 

MC34067, MC33067

The maximum duty cycle is controlled by the leakage

inductance, not by the MC34067. The One−Shot in the

MC34067 only assures that the power switch is turned on

under a zero voltage condition. Adjust the one−shot period

COSC

5.1 V

3.6 V

5.1 V

One−Shot

3.6 V

so that the output switch is activated while the primary

current is slewing but before the current changes polarity.

The resonant stage should then be designed to be as long as

the time for the primary current to go to 0 A.

Drive Output A

Drive Output B

Vin

Input Voltage 1/2 Vin

0V

+ Iprimary

Primary Current 0 A

− Iprimary

Vin/Turns Ratio

Output Rectifier Voltage

Figure 21. Application Timing Diagram

http://onsemi.com

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