Semiconductor Components Industries LLC April Rev

Amy

Description

Niveau: Secondaire, Lycée, Terminale
? Semiconductor Components Industries, LLC, 2002 April, 2002 – Rev. 4 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 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 R JA 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 C T R T Ground C1 1 Inv Input C2 Q2 E2 E1 1 ≈ 0.1 V Oscillator V CC 5.0 V REF (

• timing diagram


• frequency


• output


• comparator


• min typ


• characteristics symbol

Sujets

• Première
• Common emitter
• Régulation
• Timing diagram
• Frequency
• Output
• Comparator

Informations

• Publié par: profil-zyan-2012
• Nombre de lectures: 33

Extrait

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 MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.) Rating Symbol Value Unit Power Supply Voltage V CC 42 V Collector Output Voltage V C1 , 42 V V C2 Collector Output Current I C1 , I C2 500 mA (Each transistor) (Note 1) Amplifier Input Voltage Range V IR ±0.3 to +42 V Power Dissipation @ T A   ≤ 45 ° C P D 1000 mW Thermal Resistance, R  JA 80 ° C/W Junction±to±Ambient Operating Junction Temperature T J 125 ° C Storage Temperature Range T stg ±55 to +125 ° C Operating Ambient Temperature Range T A ° C TL494B ±40 to +125 TL494C 0 to +70 TL494I ±40 to +85 NCV494B ±40 to +125 Derating Ambient Temperature T A 45 ° C 1. Maximum thermal limits must be observed. PIN CONNECTIONS N I o np n u i t nv 1   Error 2 E A rr m o p r   16 I N npu o t ninv Inv 2 Amp 1  V 15 I n np v ut Input CC Compen/PWN 5 0 V Comp Input  3 ≈ 0 1 V  REF 14 V ref Deadtime Output Control 4 13  Contro l C T 5 12 V CC Oscillator R T 6 11 C2 Q2 Ground 7 10 E2 C1 8 Q1 9 E1 (Top View)  Semiconductor Components Industries, LLC, 2002 April, 2002 ± Rev. 4

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http://onsemi.com MARKING DIAGRAMS 16 SO±16 TL49 16 D SUFFIX 4xD CASE 751B AWLYWW 1 1 16 PDIP±16 * N SUFFIX TL494xN CASE 648 AWLYYWW 16 1 1 x = B, C or I A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week *This marking diagram also applies to NCV494. ORDERING INFORMATION Device Package Shipping TL494BD SO±16 48 Units/Rail TL494BDR2 SO±16 2500 Tape & Reel TL494CD SO±16 48 Units/Rail TL494CDR2 SO±16 2500 Tape & Reel TL494CN PDIP±16 25 Units/Rail TL494IN PDIP±16 25 Units/Rail NCV494BDR2* SO±16 2500 Tape & Reel *NCV494: T low = ±40 ° C, T high = +125 ° C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control.

Publication Order Number: TL494/D