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The Texas Instruments PT4494N is a high-efficiency booster module designed to augment the capabilities of the PT4474 Excalibur™ DC/DC converter. This module provides an additional 20A of output current, allowing for increased power delivery in demanding applications.
Key electrical specifications include an 18V to 36V input voltage range and a programmable output voltage range of 4.6V to 5.7V. The PT4494N boasts 1500 VDC isolation and achieves up to 90% efficiency. It incorporates essential protection features such as over-current, over-temperature, and over-voltage protection, along with a foldback output current limit.
For system integration, the module features an On/Off inhibit control and a differential remote sense to compensate for voltage drops. It operates within an ambient temperature range of -40°C to +85°C. The PT4494N is typically used in conjunction with the PT4474 to achieve higher output currents beyond the PT4474's standalone capability.
The input voltage range for the PT4494N is 18V to 36V.
The PT4494N offers a programmable output voltage range of 4.6V to 5.7V.
The PT4494N has an isolation voltage rating of 1500 VDC.
The PT4494N achieves a typical efficiency of 90%.
The PT4494N includes foldback output current limit, over-temperature protection, over-current protection, and over-voltage protection.
The PT4494N operates in an ambient temperature range of -40°C to +85°C.