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TL598CDBBN/a3avaiPulse-Width-Modulation (Pwm) Control Circuit
TL598CDRTIN/a65avaiPulse-Width-Modulation (Pwm) Control Circuit
TL598CNTIN/a42avaiPulse-Width-Modulation (Pwm) Control Circuit


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TL598CD-TL598CDR-TL598CN
Pulse-Width-Modulation (Pwm) Control Circuit
Internal Circuitry Prohibits Double Pulse atEither Output Variable Dead-Time Provides Control Over
Total Range
Internal Regulator Provides a Stable 5-V
Reference Supply, Trimmed to 1%
Tolerance
On-Board Output Current-Limiting
Protection
Undervoltage Lockout for Low-VCCConditions Separate Power and Signal Grounds
description/ordering information

The TL598 incorporates all the functions required in the construction of pulse-width-modulated (PWM)
controlled systems on a single 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 of 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
can 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 �fO� 1
2RTCT �. For single-ended applications:� 1 CT.
ORDERING INFORMATION

†Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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