Isolated gate drivers integrate isolated power

12 November 2008 Power Electronics / Power Management

Analog Devices introduced what it claims are the industry’s first isolated half-bridge gate drivers to incorporate isolated power and isolated gate drivers in one package. The ADuM5230 and ADuM6132 are designed for implementations that include motor drives, plasma displays, and power inverters found in power supplies and solar power converters. On both devices, the integrated, isolated converter powers both the high-side output and any external buffer circuitry, eliminating the cost, space, and design complexity associated with external power supply configurations. In the ADuM5230, which supplies 200 mW of power, the high-side and low-side outputs are isolated from each other as well as from the inputs. In the ADuM6132, which supplies 300 mW of power, only the high-side output is isolated from the input. On both products, the outputs may be operated up to ±700 V (peak) relative to each other. On the ADuM5230, the isolated outputs may be operated up to ±700 V (peak) relative to the inputs, thereby supporting low-side switching to negative voltages.

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