Maxim Integrated Products has introduced the MAX17497 power regulator for the communications and metrology boards typically used in smart meter designs.
According to the supplier, a typical flyback controller topology with high-voltage FETs can be expensive and requires external regulators and other discrete devices to complete the application.
The MAX17497 integrates the control circuitry required for the universal-input (85V to 265V), non-isolated flyback power supplies. It adds a secondary-side synchronous buck regulator with integrated mosfets.
All these integrated functions support the supplies for a powerline communication (PLC) driver or RF transceiver, the PLC/RF modem (2.5V/3.3V), a circuit-breaker relay, and the tightly regulated supplies for the sensitive metrology and application system on chips (SoCs).
The device operates at 250kHz/500kHz, and so avoids the frequencies used in smart meter communications.
The high-flyback-regulator and secondary buck-regulator frequency allows for optimisation of the magnetic and filter components in the smart meter.
The chip is offered in a 3x3mm TQFN package. It operates over the -40 degrees Celsius to +125 degrees Celsius temperature range.
www.maxim-ic.com/Smartergrid