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TL1451AQPWRQ1 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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TL1451AQPWRQ1 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 24 page TL1451A-Q1 DUAL PULSEWIDTHMODULATION CONTROL CIRCUITS SGLS304A − JUNE 2005 − REVISED JUNE 2008 1 www.ti.com D Qualified for Automotive Applications 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, undervoltage 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 TL1451A is characterized for operation from − 40 °C to 125°C. AVAILABLE OPTIONS{ PACKAGED DEVICES} TA TSSOP (PW)§ −40 °C to 125°C TL1451AQPWRQ1 † For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at http://www.ti.com. ‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging. § The PW package is only available left-end taped and reeled. Copyright 2008, 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 PW 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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