T
treez
Guest
Hi,
The NCP3063 and the MC34063 PWM controller are virtually identical, except that the MC34063 offers the capability to drive the internal transistor(s) either with Darlington configuration, or with Emitter Follower configuration. NCP3063 only allows it to be driven in the Darlington configuration.
So why on page 5 of the NCP3063 datasheet does figure 7 refer to the “Emitter Follower” configuration. (this would surely only be for when an external power transistor was used in the case of NCP3063?)
Page 14 of AN920 shows the MC34063 being driven with emitter followed configuration, instead of the Darlington configuration.........
AN920
https://www.onsemi.com/pub/Collateral/AN920-D.PDF
MC34063 Datasheet
https://www.onsemi.com/pub/Collateral/MC34063A-D.PDF
NCP3063 Datasheet
https://www.onsemi.com/pub/Collateral/NCP3063-D.PDF
The NCP3063 and the MC34063 PWM controller are virtually identical, except that the MC34063 offers the capability to drive the internal transistor(s) either with Darlington configuration, or with Emitter Follower configuration. NCP3063 only allows it to be driven in the Darlington configuration.
So why on page 5 of the NCP3063 datasheet does figure 7 refer to the “Emitter Follower” configuration. (this would surely only be for when an external power transistor was used in the case of NCP3063?)
Page 14 of AN920 shows the MC34063 being driven with emitter followed configuration, instead of the Darlington configuration.........
AN920
https://www.onsemi.com/pub/Collateral/AN920-D.PDF
MC34063 Datasheet
https://www.onsemi.com/pub/Collateral/MC34063A-D.PDF
NCP3063 Datasheet
https://www.onsemi.com/pub/Collateral/NCP3063-D.PDF