Switch mode Pulse Width Modulation Control Circuit
TL494, NCV494
The TL494 is a fixed frequency, pulse width modulation ...
Switch mode Pulse Width Modulation Control Circuit
TL494, NCV494
The TL494 is a fixed frequency, pulse width modulation control circuit designed primarily for switch mode power supply control.
Features
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
Pb−Free Packages are Available*
MAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.)
Rating
Symbol
Value
Unit
Power Supply Voltage Collector Output Voltage
Collector Output Current (Each
transistor) (Note 1)
VCC
42
V
VC1,
42
V
VC2
IC1, IC2
500
mA
Amplifier Input Voltage Range
Power Dissipation @ TA ≤ 45°C Thermal Resistance, Junction−to−Ambient
Operating Junction Temperature
Storage Temperature Range
Operating Ambient Temperature Range TL494B TL494C TL494I NCV494B
VIR PD RqJA TJ Tstg TA
−0.3 to +42 V
1000
mW
80
°C/W
125
°C
−55 to +125 °C
°C −40 to +125
0 to +70 −40 to +85 −40 to +125
Derating Ambient Temperature
TA
45
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occ...
