Edited by PETech Staff

PWM Controller

The LT1950's programmable leading edge blanking eliminates the need for current sense filtering. Compared to dc-dc converter modules, the LT1950 solution is smaller, lighter, has lower profile and better airflow, and is significantly lower in cost. Its key applications include power supplies in telecom, industrial, medical, automotive, and aerospace systems where a high reliability isolated/nonisolated power supply rail is used to distribute power within the system.

The LT1950's adaptive maximum duty cycle clamp follows the input voltage so that load and line transients do not cause excessive flux swing in the transformer. Without this feature, designers must use an oversized transformer, larger MOSFETs and extensive filtering. With its adjustable undervoltage lockout (UVLO), the LT1950 can be easily customized to operate with a wide range of input supplies. The operating frequency is adjustable with a resistor from 100kHz to 500kHz. The IC is synchronizable to an external clock while a precision internal reference guarantees an accurate output voltage. It’s packaged in a 16-lead SSOP.

For more information, visit www.linear.com.

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