SWITCHMODE PULSE WIDTH MODULATION

Niveau: Supérieur, Master
Device Operating Temperature Range Package SEMICONDUCTOR TECHNICAL DATA SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT ORDERING INFORMATION TL494CN TL494IN TA = 0° to +70°C TA = – 25° to +85°C Plastic Plastic PIN CONNECTIONS Order this document by TL494/D N SUFFIX PLASTIC PACKAGE CASE 648 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 Control VCC Noninv Input Compen/PWN Comp Input Deadtime Control Error Amp + –2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 2 ErrorAmp + – Q1 D SUFFIX PLASTIC PACKAGE CASE 751B (SO–16) TL494CD SO–16 1MOTOROLA ANALOG IC DEVICE DATA ? 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.

• timing diagram


• output


• min typ


• pwm comparator


• output control


• characteristics symbol