IL494 Datasheet, PDF (1/4 Pages) Integral Corp. – PWM Control Circuit

TECHNICAL DATA
PWM Control Circuit
IL494
The IL494 incorporates on a single monolithic chip all the
functions required in the construction of a pulse-width-modulation
control circuit. Designed primarily for power supply control, the IL494
contains an on-chip 5-volt regulator, two error amplifiers, adjustable
oscillator, dead-time control comparator, pulse-steering flip-flop, and
output-control circuitry. The uncommitted output transistors provide
either common-emitter or emitter-follower output capability. Push-pull
or single-ended output operation may be selected through the output-
control function. The architecture of the IL494 prohibits the possibility
of either output being pulsed twice during push-pull operation.
• Complete PWM Power Control Circuitry
• Uncommitted Outputs for 200 mA Sink or Source
• Output Control Selects Single-Ended or Push-Pull Operation
• Internal Circuitry Prohibits Double Pulse at Either Output
• Internal Regulator Provides a Stable 5 V Reference Supply
• Variable Dead-Time Provides Control Over Total Range
ORDERING INFORMATION
IL494N Plastic
IL494D SOIC
T_A = -20°C to 85° C
for all packages
PIN ASSIGNMENT
FUNCTION TABLE
Output Control
Grounded
At V_ref
Output Function
Single-ended or Parallel Output
Normal Push-Pull Operation
LOGIC DIAGRAM
1