Isolated Hot-Dog Cooker

We've cooked hot dogs using line voltage on other demos to show the danger of unisolated high voltage. In this demo, we’ll show a controlled, isolated hot-dog electrocutor.
The circuitry is important for applications such as battery charging and motor control. A silicon carbide FET modulates the voltage to the load. An isolator protects the controller. A DC-to-DC convertor provides an isolated five-volt supply to power the isolator and an isolated nine-volt gate supply.
A non-contact current sensor evaluation board measures the current drawn by the hot dog and enables overcurrent protection.
Cooking is controlled by an Arduino. An isolator protects the Arduino from the high voltage, and one of our DC-to-DC convertors provides isolated power to drive the FET. This isolator can drive some FETs directly, but for this FET we have a separate gate driver.
There’s also a beeper to signal when the hot dog is done.
The cooking power starts high, then decreases to avoid burning. The profile is defined in the Arduino.
Future safety enhancements we’re planning include AC soft start, an enclosure interlock, and a temperature sensor.
IL600-Series isolators have best-in-class Common-Mode Transient Immunity. They have an extended three to 6.6-volt power supply range for direct-drive of six-volt MOSFET gates.
ILDC-Series DC-to-DC convertors are available with various output voltages--we used the five-volt version in this demo. They are available in DFN versions that are the world’s smallest isolated DC-DC convertors.
email us at [e-mail]. Our engineers would “relish” a chance to “ketchup” on your requirements.
These are the key parts in this demo:
FET isolator: www.nve.com/we...
DC-to-DC Convertor: www.nve.com/we...
Current Sensor Eval Board: www.nve.com/we...