Linear Technology Corp. (LTC, Milpitas, CA) introduced the new LT1950 pulse-width modulator (PWM) controller to protect, simplify and reduce the size of isolated/non-isolated 15W to 500W power supplies with 24V and 48V input supply rails. The LT1950 features an adaptive, maximum duty cycle, clamp circuit to prevent transformer saturation and to protect the MOSFET from catastrophic failures. The feature reduces the transformer size by as much as 50%.
The LT1950's programmable 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, according to LTC. Applications include power supplies in telecom, industrial, medical, automotive and aerospace systems where a high-reliability, isolated/non-isolated, power supply rail is used to distribute power within the system.
The LT1950 is guaranteed for operation over the junction temperature range from -40°C to +125°C. Pricing for the LT1950 starts at $2.90 each in 1,000-piece quantities.
