UC1525A/27A
UC2525A/27A
UC3525A/27A
PRINCIPLES OF OPERATION AND TYPICAL CHARACTERISTICS
UC1525A output circuit (1/2 circuit shown).
UC1525A output saturation characteristics.
For single-ended supplies, the driver outputs are
grounded. The VC terminal is switched to ground by the
totem-pole source transistors on alternate oscillator
cycles.
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-up capacitors
C1 and C2.
The low source impedance of the output drivers provides
rapid charging of power FET Input capacitance while
minimizing external components.
Low power transformers can be driven by the UC1525A.
Automatic reset occurs during dead time, when both
ends of the primary winding are switched to ground.
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TI [ TEXAS INSTRUMENTS ]
