Datasheets

The PD5036 is a unique pulse width modulator controller, designed primarily for a variety of high voltage sinusoidal telephone ring generator applications. The PD5036 is suitable for applications requiring up to 6 Watt and provides all necessary controls for implementing advanced overload protection, zero crossing relay switching synchronization, Off-Hook detection, multiple ringing frequency selection and output amplitude adjustment. The power train, designed to be used with the PD5036, is an isolated, open loop flyback topology. The PD5036 generates a PWM signal, which drives a FET transistor that switches the primary of a flyback transformer. This produces a rectified half sine wave on the secondary side of the transformer. An additional control signal synchronizes a 4-output transistor bridge, which converts the rectified half sine wave to full sine wave. In order to maintain the ring generator’s input to output isolation, the synchronization signals control the bridge via an opto coupler pair. The controller also includes overload protection, A/D function for measuring the input voltage, and a report signal for indicating over current. The PD5036 is a cost-effective solution for applications using more than 10,000 units. For quantities less than 10,000 units, the most economical solution is a modular sine wave ring generator (PCR-SIN01A Series, PCR-SIN03B Series, or the PCR-SIN06 Series).