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TL598CNE4 Datasheet(PDF) 1 Page - Texas Instruments |
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TL598CNE4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page TL598 PULSEWIDTHMODULATION CONTROL CIRCUITS SLVS053D − FEBRUARY 1988 − REVISED NOVEMBER 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Complete PWM Power-Control Function D Totem-Pole Outputs for 200-mA Sink or Source Current D Output Control Selects Parallel or Push-Pull Operation D Internal Circuitry Prohibits Double Pulse at Either Output D Variable Dead-Time Provides Control Over Total Range D Internal Regulator Provides a Stable 5-V Reference Supply, Trimmed to 1% Tolerance D On-Board Output Current-Limiting Protection D Undervoltage Lockout for Low-VCC Conditions D 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 f O + 1 2RTCT . For single-ended applications: f O + 1 RT CT . ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP (N) Tube of 25 TL598CN TL598CN 0 °C to 70°C SOIC (D) Tube of 40 TL598CD TL598C 0 C to 70 C SOIC (D) Reel of 2500 TL598CDR TL598C † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2003, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 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. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1IN+ 1IN− FEEDBACK DTC CT RT SIGNAL GND OUT1 2IN+ 2IN− REF OUTPUT CTRL VCC VC POWER GND OUT2 D OR N PACKAGE (TOP VIEW) ERROR AMP 1 ERROR AMP 2 |
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