UTC494
DESCRIPTION
The UTC494 incorporate on a single monolithic chip all the functions required in the construction of a pulse-width modulation control circuit.Designed primarily for power supply control, the device offers the systems engineer the flexibility to tailor the power supply control circuitry to its application.
The UTC494 contains an error amplifier,current-limiting amplifier, an on-chip adjustable oscillator, a dead time control parator,pulse-steering control flip-flop,a 5volt ,1% precision supply regulator,and output control circuits.
The error amplifier exhibits a mon-mode Voltage range from -0.3V to VCC-2V.The current-limit amplifier exhibits a mon-mode Voltage range from -0.3V to 3V with an offset Voltage of approximately 80 m V in series with the inverting input to ease circuit design requirements. The dead-time control parator has a fixed offset that provides approximately 5% dead time when externally altered. The onchip oscillator may be bypassed by terminating RT(pin 6)...
