Maxim Debuts the MAX5014/MAX5015 PWM Controllers

Maxim Integrated Products (Sunnyvale, CA) announced new current-mode PWM controllers with an integrated start-up circuit for isolated power supplies. The company reports that its new MAX5014/MAX5015 controllers integrate all of the building blocks necessary for implementing dc/dc fixed-frequency isolated power supplies. These devices are suitable for use in isolated telecommunications and industrial voltage-range power supplies.

The MAX5014/MAX5015 feature current-mode control with blanking. Internal ramp-compensation circuitry stabilizes the current loop when operating at duty cycles above 50 percent in the MAX5014, which allows 85 percent of operating duty cycle and could be used to implement flyback converters. The MAX5015 limits the operating duty to less than 50 percent and can be used in single-ended forward converters.

The controllers utilize a high-voltage startup circuit to draw power directly from the 18V to 110V input supply during startup. The switching frequency is internally trimmed to 275kHz +/-10 percent.

The MAX5014/MAX5015 are available in eight-pin SO packages. An evaluation kit (MAX5015EVKIT) is also available.