TL494CNG

DC DC Switching Controllers Overview

The onsemi TL494CNG is a Switchmode Pulse Width Modulation (PWM) control circuit designed for fixed-frequency power supply applications. It integrates complete PWM control circuitry, including an on-chip oscillator with master or slave operation, two error amplifiers, adjustable deadtime control, and uncommitted output transistors rated to 500 mA source or sink current. The device supports push-pull or single-ended output configurations and features a 5.0 V reference. It operates within a supply voltage range of 7 V to 40 V, with a nominal input of 15 V. The component is housed in a 16-pin SOIC package.

DC DC Switching Controllers Feature Summary

• Integrates complete pulse width modulation control circuitry with an on-chip oscillator supporting master or slave operation.
• Includes two on-chip error amplifiers and adjustable deadtime control for precise regulation.
• Features uncommitted output transistors capable of sourcing or sinking up to 500 mA.
• Supports flexible output control for both push-pull and single-ended topologies.

DC DC Switching Controllers Applications

• Push-pull power supplies
• Single-ended forward converters
• Half-bridge and full-bridge converters

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'CNG' against official datasheets to confirm package type and temperature rating. Ensure compatibility with existing PCB footprints for the 16-DIP or equivalent package. Confirm lead-free status and RoHS compliance requirements for the target assembly process. Cross-reference ordering information with authorized distributors to avoid counterfeit components.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring a versatile PWM controller with integrated error amplifiers and adjustable deadtime. Consider the 500 mA output drive capability when determining external driver requirements. Evaluate the operating temperature range and packaging options against thermal management needs. Verify that the 7 V to 40 V input range aligns with the system's power rail specifications.

DC DC Switching Controllers Part Context

The TL494 is a widely used industry-standard PWM control chip originally developed by Texas Instruments. onsemi manufactures compatible versions under the NCV prefix for automotive-grade reliability, though the standard TL494CNG serves general industrial and commercial applications. It remains a foundational component for various DC-DC converter topologies due to its comprehensive feature set and long-standing market presence.

DC DC Switching Controllers Replacement Considerations

Direct pin-compatible substitutes include the TI TL494C and NCV494BDR2. Verify electrical parameters such as quiescent current and output drive strength when substituting. Ensure the replacement part meets the same temperature and packaging requirements for seamless integration.