SG2525A-SG3525A
Figure 8.
Figure 9
.
For single-ended supplies, the driver outputs are
grounded.TheVC terminalisswitched to groundby
thetotem-polesourcetransistorson alternateoscil-
latorcycles.
In conventional push-pull bipolar designs, forward
base drive is controlled by R1 - R3. Rapid turn-off
times for the power devices are achieved with
speed-upcapacitorsC1 and C2.
Figure 10.
Figure 11.
Thelowsourceimpedanceoftheoutputdriverspro-
vides rapid charging of Power Mos input capaci-
tancewhile minimizing externalcomponents.
Low power transformers can be driven directly.
Automaticresetoccursduringdeadtime,whenboth
endsof theprimary windingareswitched toground.
9/12
STMICROELECTRONICS [ ST ]
