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SL494D Datasheet(PDF) 1 Page - System Logic Semiconductor |
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SL494D Datasheet(HTML) 1 Page - System Logic Semiconductor |
1 / 4 page SL494 System Logic Semiconductor SLS PWM Control Circuit The SL494 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 SL494 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 b eing 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 SL494N Plastic SL494D SOIC TA = -20 °C to 85° C for all packages PIN ASSIGNMENT FUNCTION TABLE Output Control Output Function Grounded Single-ended or Parallel Output At Vref Normal Push-Pull Operation LOGIC DIAGRAM |
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