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Voltage Mode PWM Controller I.C.

TL494CN
Photo of a DIP 16 case.

$2.20

QTY Price
1 $2.20
5 $1.50

Description

This Voltage Mode PWM Controller I.C. contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.

The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.

The uncommitted output transistors provide either common-emitter or emitter-follower output capability. This device provides for push-pull or single-ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.

Characterized for operation from 0°C to 70°C.

Features

  • Circuit architecture allows for easy synchronisation
  • Uncommitted outputs for 200mA sink or source current
  • Output control selects single-ended or push-pull operation
  • Internal circuitry prohibits double pulse at either output
  • Variable dead time provides control over total range
  • Internal regulator provides a stable 5V reference supply with 5% tolerance
  • Complete PWM power-control circuitry
  • Applications include: desktop PCs, microwave ovens, server PSUs, solar micro-inverters, washing machines, e-bikes, smoke detectors, solar power inverters

Specifications

Output Voltage

40V

Output Current

200mA

Supply Voltage

7V - 40V

Controller IC Case Style

DIP

No. of Pins

16

Frequency

300kHz

Operating Temperature

0°C - 70°C

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