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MC34063 already has a MOSFET driver incorporated in it. So you don't need this circuit. Moreover, this circuit only improves in discharging the gate quickly by grounding it. A better circuit would be a totem-pole circuit which both sources and sinks current to the gate very quickly.
MC34063 already has a MOSFET driver incorporated in it. So you don't need this circuit. Moreover, this circuit only improves in discharging the gate quickly by grounding it. A better circuit would be a totem-pole circuit which both sources and sinks current to the gate very quickly.
Okay, the introduction says it contains a driver, but upon close inspection, I see that you are right. The driver can not be used to directly drive a MOSFET very efficiently without the use of external transistor, etc.
If you are powering the MC34063 with 12v or more, then your circuit is fine and all good.
On the other hand, the UC384x series of controllers have integrated totem-pole drivers.
UC384X usually ment for higher voltage aplications, were primary current is less. Also both are working in enterly different principle.
The current sense voltage of UC384X is above 1V were MC34063 got nearly 300mV
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