STMicroelectronics STDRIVE601 three-phase gate driver

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The STMicroelectronics STDRIVE601 three-phase gate driver for 600 V N-channel power MOSFETs and IGBTs provides ruggedness against negative voltage spikes down to -100 V and responds to logic inputs in 85 ns.

Featuring smart-shutdown circuitry for fast-acting protection, the product turns off the gate-driver outputs immediately after detecting overload or short-circuit, for a period determined using an external capacitor and resistor. Designers can set the required duration, using large C-R values if needed, without affecting the shutdown reaction time. An active-low fault indicator pin is provided.

The device replaces three half-bridge drivers to ease PCB layout and optimise the performance of three-phase motor drives for equipment such as home appliances, industrial sewing machines, and industrial drives and fans.

All outputs can sink 350 mA and source 200 mA, with gate-driving voltage range of 9–20 V, for driving N-channel power MOSFETs or IGBTs. Matched delays between the low- and high-side sections eliminate cycle distortion and allow high-frequency operation, while interlocking and deadtime insertion are featured to prevent cross conduction.

Fabricated in ST’s BCD6S offline process, the product operates from a logic supply voltage up to 21 V and high-side bootstrap voltage up to 600 V. Bootstrap diodes are integrated, and under-voltage lockout (UVLO) on each of the low-side and high-side driving sections prevents the power switches from operating in low-efficiency or dangerous conditions.

For more information: www.st.com/stdrive601-pr.