KK494 Datasheet, PDF (1/5 Pages) KODENSHI KOREA CORP. – PWM Control Circuit

TECHNICAL DATA
PWM Control Circuit
KK494
The KKK494 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 KK494 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 KK494 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
KK494N Plastic
KK494D 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
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