Vishay's Isolated Photovoltaic MOSFET Driver With Integrated Turn-Off Capability

29th November 2012
Source: Vishay
Posted By : ES Admin
Vishay's Isolated Photovoltaic MOSFET Driver With Integrated Turn-Off Capability
Vishay broadens its optoelectronics portfolio with the introduction of a new isolated photovoltaic MOSFET driver in the compact SOP-4 surface-mount package. The new VOM1271 features integrated turn-off circuitry, eliminating the need for external turn-off components and a secondary-side power supply. The new MOSFET driver greatly reduces implementation cost and PCB space usage while increasing overall system reliability and performance.
The VOM1271 is optimized for high-side MOSFET drivers, isolated solenoid drivers, and custom solid-state relays in end products including industrial and automatic test equipment systems. Previously, designers have been limited to low-power, off-the-shelf SSRs or bulky and expensive high-voltage hockey puck modules for these applications. The VOM1271 allows mechanical SSRs to be replaced with more reliable MOSFET-based solutions requiring a minimum level of system complexity.



The new driver features an open circuit voltage up to 8.8 V typical and a short-circuit current up to 47 µA typical. The higher open circuit voltage allows designers to choose from a wider range of MOSFETs; the higher short-circuit current decreases the time required to charge the MOSFET's gate. This combination of high open-circuit voltage and short-circuit current boosts the life, reliability, and switching speed of end products.



The VOM1271's optical coupling provides a high isolation test voltage of 4500 VRMS. The isolation provided by the device fulfills the safety requirements mandated by domestic as well as international safety agencies, in addition to delivering an effective barrier to noise between sensitive control circuitry and output loads.



Samples of the VOM1271 are available now. Production quantities are currently available, with lead times of four to six weeks for larger orders.

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