SLVS053B - FEBRUARY 1988 - REVISED OCTOBER 1995
The TL598 incorporates all the functions required in the construction of pulse-width-modulated (PWM) controlled systems on a single monolithic chip. Designed primarily for power supply control, the TL598 provides the systems engineer with the flexibility to tailor the power supply control circuits to a specific application.
The TL598 contains two error amplifiers, an internal oscillator (externally adjustable), a dead-time control (DTC) comparator, a pulse-steering flip-flop, a 5-V precision reference, undervoltage lockout control, and output control circuits. Two totem-pole outputs provide exceptional rise and fall time performance for power FET control. The outputs share a common source supply and common power ground terminals, which allow system designers to eliminate errors caused by high current-induced voltage drops and common-mode noise.
The error amplifier has a common-mode voltage range from 0 V to VCC -2 V. The DTC comparator has a fixed offset that prevents overlap of the outputs during push-pull operation. A synchronous multiple supply operation may be achieved by connecting RT to the reference output and providing a sawtooth input to CT.
The TL598 device provides an output control function to select either push-pull or parallel operation. Circuit architecture prevents either output from being pulsed twice during push-pull operation. The output frequency for push-pull applications is one-half the oscillator frequency . For single-ended applications:
The TL598C is characterized for operation from 0°C to 70°C. The TL598Q is characterized for operation from -40°C to 125°C. The TL598M is characterized for operation from -55°C to 125°C.
View more information about generic part numbers:TL598
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