Name: PWM Controller (up to 200 kHz)
Brand: PWM Controller (up to 200 kHz)
SKU: TL494

PWM Controller (up to 200 kHz)

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Overview

The TL494 PWM Controller incorporates all the functions required in the construction of a pulse width modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application.

The TL494 PWM Controller 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 PWM Controller 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.

The TL494C PWM Controller is characterized for operation from 0C to 70C. The TL494I is characterized for operation from -40C to 85C. The TL494B is characterized for operation from -40C to 125C. The NCV494B is characterized for -40C to 125C and certified for automotive applications.

Off-line power supply
Buck converter

VPA (Vehicle Power Adapter)
LED Lighting

Complete Pulse Width Modulation Control Circuitry
On-Chip Oscillator with Master or Slave Operation
On-Chip Error Amplifiers
On-Chip 5.0 V Reference
Adjustable Deadtime Control
Uncommitted Output Transistors Rated to 500 mA Source or Sink
Output Control for Push-Pull or Single-Ended Operation
Undervoltage Lockout
Pb-Free Packages are Available*
Variable Frequency Operation (up to 200 KHz)
PWM Buck Controller Configuration

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Reference Price

TL494BDR2G

Active

SOIC-16

751B-05

260

REEL

2500

Step-Up

Voltage Mode

$0.4527

TL494CDR2G

Active

SOIC-16

751B-05

260

REEL

2500

Step-Up

Voltage Mode

$0.4544

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12120914040

Controllers | TL494

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