TL494CDG DC-DC Power Conversion by ON Semiconductor

PWM Controller (up to 200 kHz)

Power Management > DC-DC Power Conversion > Controllers
Status: Unknown
Series: TL494
RoHS: Compliant
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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.

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Features

Variable Frequency Operation (up to 200 KHz)
PWM Buck Controller Configuration
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*
Benefits
Optimize system size and efficiency
Simple to use in buck configuration
Applications
Off-line power supply
VPA (Vehicle Power Adapter)
End Products
Buck converter
LED Lighting

Specifications

Compliance Pb-free

Frequently Asked Questions

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Additional datasheets, footprints and schematics for TL494CDG are listed on our Part Details page. You can also find images and similar parts to TL494CDG on this page.

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What category does TL494CDG fall under?

The TL494CDG is listed under Power Management > DC-DC Power Conversion > Controllers.

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Is the TL494CDG RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

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