Maxim Introduces First Highly Integrated Smart Meter Power Supply Chip

Maxim Integrated Products, Inc. introduced the MAX17497, a single-chip solution that meets the power requirements of smart meter communications and metering circuit blocks. Highly integrated solutions can effectively simplify design, increase design flexibility, improve accuracy and reliability, and at the same time reduce the cost and size of the solution. This single-chip power controller is ideal for smart meter/smart grid and factory automation applications.
The industry desperately needs a compact, economical power solution. Common smart meter solutions integrate only flyback controllers and high-voltage FETs. This architecture is expensive and requires an external voltage regulator and other discrete components to meet application requirements, increasing Plan size and total cost. The power companies and energy companies urgently need a compact, low-cost alternative.
Unprecedented, Highly Integrated Design The MAX17497 is optimized for industry-leading smart meter applications and provides multiple outputs. The device meets all the power supply requirements of the communication and metering circuits in the smart meter.
The MAX17497 integrates the control circuitry required for a universal input (85V to 265V), non-isolated flyback power supply. The device also includes a secondary synchronous buck regulator with a built-in MOSFET. These integrated functions are designed to support the power supply design of power line communication (PLC) drivers or RF transceivers, PLC/RF modems (2.5V/3.3V), and breaker relays, while also meeting high-precision metering, system-on-chip (SoCs). ) Strict voltage regulation requirements.
Meet all the requirements of smart meter power supply for flexibility, accuracy and reliability The MAX17497 offers great design flexibility. Regardless of the communication mechanism used, designers can configure the device to meet the power requirements of the smart meter.
The flyback regulator is designed to work at 250kHz/500kHz, avoiding the smart meter communication frequency, thereby reducing frequency interference and ensuring reliable performance. The magnetic and filter components in the smart meter can be optimized for the operating frequency of the high-voltage flyback regulator and the secondary-side buck regulator.
The MAX17497 also improves overall system reliability through user-definable thresholds and protection features. Under-voltage lockout (UVLO) and overvoltage threshold inputs are programmable, and over-temperature, short-circuit protection, and power-good indications greatly increase system safety.
The MAX17497 is available in a small 3mm x 3mm TQFN package and operates over the -40°C to +125°C temperature range.

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