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TL594CPWRE4 Folha de dados(PDF) 1 Page - Texas Instruments |
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TL594CPWRE4 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 19 page www.ti.com FEATURES 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1IN+ 1IN- FEEDBACK DTC CT RT GND C1 2IN+ 2IN- REF OUTPUT CTRL VCC C2 E2 E1 D, N, NS, OR PW PACKAGE (TOP VIEW) DESCRIPTION/ORDERING INFORMATION TL594 PULSE-WIDTH-MODULATION CONTROL CIRCUIT SLVS052G – APRIL 1988 – REVISED JANUARY 2007 • Complete PWM Power-Control Circuitry • Uncommitted Outputs for 200-mA Sink or Source Current • Output Control Selects Single-Ended or Push-Pull Operation • Internal Circuitry Prohibits Double Pulse at Either Output • Variable Dead Time Provides Control Over Total Range • Internal Regulator Provides a Stable 5-V Reference Supply Trimmed to 1% • Circuit Architecture Allows Easy Synchronization • Undervoltage Lockout for Low-V CC Conditions The TL594 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the systems engineer the flexibility to tailor the power-supply control circuitry to a specific application. The TL594 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V regulator with a precision of 1%, an undervoltage lockout control circuit, and output control circuitry. The error amplifiers have a common-mode voltage range of –0.3 V to VCC – 2 V. The DTC comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can be used to drive the common circuitry in synchronous multiple-rail power supplies. The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each device provides for push-pull or single-ended output operation, with selection by means of the output-control function. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is operational. The TL594C is characterized for operation from 0 °C to 70°C. The TL594I is characterized for operation from –40 °C to 85°C. 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. PRODUCTION DATA information is current as of publication date. Copyright © 1988–2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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