IL494_11 Datasheet, PDF (1/9 Pages) IK Semicon Co., Ltd – PWM Control Circuit

TECHNI CAL DATA
PWM Control Circuit
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.
IL494
FEATURE
• 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
ORDERI NG I NFORM ATI ON
Device
IL494N
IL494D
IL494DT
Operating
Temperature Range
Package
Plastic
TA = -20° to 85° C
for all packages
DIP-16
SOP-16
SOP-16
FUNCTION TABLE
Shipping
Tube
Tube
Tape& Reel
Output Control
Grounded
At V_ref
Output Function
Single-ended or Parallel Output
Normal Push-Pull Operation
LOGIC DIAGRAM
PIN ASSIGNMENT
2011, February, Rev. 02