Pulsiv OSMIUM Microcontroller

Our new method of efficiently converting AC to DC is achieved by using a Pulsiv OSMIUM microcontroller to monitor real-time grid condition, manage power factor correction (PFC) and regulate a high-voltage DC output to support a wide range of compatible DC-DC converters.

It maintains a flat efficiency profile over the full load range and complies with strict EMC/THD regulations. Quality, reliability, performance and availability have been addressed by combining our unique intellectual property with industry standard devices from carefully selected global tier 1 chip manufacturers.

Microcontroller Features

Active Bridge Control
Active bridge signals are provided by the Pulsiv OSMIUM microcontroller to drive a high-side low-side MOSFET configuration that increases overall efficiency by up to 1.4% (90VAC line input). This feature is particularly useful at higher power levels and requires only two MOSFET’s (see datasheet). A full active bridge can be implemented with very few additional components. (Please contact Pulsiv for details).

X-Cap Discharge
When the grid supply fails, the Pulsiv OSMIUM microcontroller will produce the signals to discharge the x-capacitor automatically using low cost switches in the half active bridge. This replaces alternative and more expensive methods such as using resistors or an additional external silicon chip. When a half active bridge isn’t fitted, an alternative circuit can be used.

Hold Up
For applications that require hold up, an optional circuit can be used to activate a Thyristor below a certain voltage threshold (determined by a simple resistor network) and maintain the HVDC output using hardware rather than software.

Grid Failure Detection
A warning signal is provided when the grid supply falls below 50V to give downstream systems the maximum time to take action. This is particularly useful in safety critical applications or where a controlled shut down is required.

Selectable Max HVDC Output
Providing the ability to select the voltage rating of the storage capacitor, allows engineers to optimise the capacitor selection for cost or performance. This flexibility enables engineers to configure the design according to the needs of their application by choosing between 160V or 200V capacitors.

Power Consumption Indicator
The POWER_USED pin displays real-time consumption by toggling at a fixed rate that is directly proportional to the actual delivered power. Our method does not require expensive current measurement techniques, but performs a calculation during each grid cycle.

AUX Output Control
The SECONDARY_PWM output can be used to drive an auxiliary supply for systems that need power when the DC-DC converter is switched off. Please contact Pulsiv for details as the supporting components will depend on specific power requirements.