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TL1451ACNS Arkusz danych(PDF) 1 Page - Texas Instruments |
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TL1451ACNS Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 37 page TL1451A DUAL PULSEWIDTHMODULATION CONTROL CIRCUITS SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 1 www.ti.com D Complete PWM Power Control Circuitry D Completely Synchronized Operation D Internal Undervoltage Lockout Protection D Wide Supply Voltage Range D Internal Short-Circuit Protection D Oscillator Frequency ... 500 kHz Max D Variable Dead Time Provides Control Over Total Range D Internal Regulator Provides a Stable 2.5-V Reference Supply D Available in Q-Temp Automotive HighRel Automotive Applications Configuration Control / Print Support Qualification to Automotive Standards description The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervol- tage lockout circuitry, and dual common-emitter output transistor circuits. The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational. The TL1451AC is characterized for operation from –20 °C to 85°C. The TL1451AQ is characterized for operation from –40 °C to 125°C. The TL1451AM is characterized for operation from –55°C to 125°C. AVAILABLE OPTIONS PACKAGED DEVICES TA SMALL OUTLINE (D) SMALL OUTLINE (DB)† PLASTIC DIP (N) SMALL OUTLINE (NS) TSSOP (PW)† CHIP CARRIER (FK) CERAMIC DIP (J) –20 °C to 85°C TL1451ACD TL1451ACDB TL1451ACN TL1451ACNS TL1451ACPW — — –40 °C to 125°C TL1451AQD — — — — — — –55 °C to 125°C — — — — — TL1451AMFK TL1451AMJ † The DB and PW packages are only available left-end taped and reeled (add LE suffix, i.e., TL1451ACPWLE). Copyright 1999, 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 CT RT ERROR 1IN+ AMPLIFIER 1 1IN– 1FEEDBACK 1DTC 1OUT GND REF SCP 2IN+ ERROR 2IN– AMPLIFIER 2 2FEEDBACK 2DTC 2OUT VCC D, DB, N, NS, PW, OR J PACKAGE (TOP VIEW) 19 20 1 32 17 18 16 15 14 13 12 11 9 10 5 4 6 7 8 2IN+ 2IN– NC 2FEEDBACK 2DTC 1IN+ 1IN– NC 1FEEDBACK IDTC FK PACKAGE (TOP VIEW) On products compliant to MILPRF38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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