UC3869

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

7 of 8

www.unisonic.com.tw

QW-R103-110.c



OPERATION DESCRIPTION (Cont.)

Gate Output

The UTC UC3869 output stage is a fast totem pole gate driver. Cross conduction has been avoided to minimize

heat dissipation, increase efficiency, and enhance reliability. A good tradeoff is achieved through dead time control.

The low idle loss and good EMI system design is easier to achieve with this dedicated control scheme. An internal

Protection Controls

The IC takes on more protection functions such as OVP, OLP and OTP etc. In case of those failure modes,the

driver works as follows.

OVP

Fig.3.

Fig.3 OVP case

Fig.4 OLP case

OLP

OTP