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TL494BD Scheda tecnica(PDF) 1 Page - ON Semiconductor |
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TL494BD Scheda tecnica(HTML) 1 Page - ON Semiconductor |
1 / 12 page © Semiconductor Components Industries, LLC, 2004 April, 2004 − Rev. 5 1 Publication Order Number: TL494/D TL494, NCV494 SWITCHMODE™ Pulse Width Modulation Control Circuit The TL494 is a fixed frequency, pulse width modulation control circuit designed primarily for SWITCHMODE power supply control. • Complete Pulse Width Modulation Control Circuitry • On−Chip Oscillator with Master or Slave Operation • On−Chip Error Amplifiers • On−Chip 5.0 V Reference • Adjustable Deadtime Control • Uncommitted Output Transistors Rated to 500 mA Source or Sink • Output Control for Push−Pull or Single−Ended Operation • Undervoltage Lockout • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.) Rating Symbol Value Unit Power Supply Voltage VCC 42 V Collector Output Voltage VC1, VC2 42 V Collector Output Current (Each transistor) (Note 1) IC1, IC2 500 mA Amplifier Input Voltage Range VIR −0.3 to +42 V Power Dissipation @ TA ≤ 45°C PD 1000 mW Thermal Resistance, Junction−to−Ambient RqJA 80 °C/W Operating Junction Temperature TJ 125 °C Storage Temperature Range Tstg −55 to +125 °C Operating Ambient Temperature Range TL494B TL494C TL494I NCV494B TA −40 to +125 0 to +70 − 40 to +85 −40 to +125 °C Derating Ambient Temperature TA 45 °C 1. Maximum thermal limits must be observed. PIN CONNECTIONS CT RT Ground C1 1 Inv Input C2 Q2 E2 E1 1 ≈ 0.1 V Oscillator VCC 5.0 V REF (Top View) Noninv Input Inv Input Vref Output Contro l VCC Noninv Input Compen/PWN Comp Input Deadtime Control Error Amp + − 2 3 4 5 6 7 89 10 11 12 13 14 15 16 2 Error Amp + − Q1 Device Package Shipping† ORDERING INFORMATION TL494CD SO−16 48 Units/Rail SO−16 D SUFFIX CASE 751B 16 1 1 16 TL494xD AWLYWW MARKING DIAGRAMS x = B, C or I A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week 1 16 PDIP−16 N SUFFIX CASE 648 TL494xN AWLYYWW 16 1 TL494CDR2 2500 Tape & Reel SO−16 TL494CN 25 Units/Rail PDIP−16 TL494IN 25 Units/Rail PDIP−16 SO−16 TL494BD 48 Units/Rail TL494BDR2 2500 Tape & Reel SO−16 http://onsemi.com * *This marking diagram also applies to NCV494. NCV494BDR2* 2500 Tape & Reel SO−16 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. *NCV494: Tlow = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control. |
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