Automotive grade PV MOSFET driver is in compact SOP-4 package
Claimed to offer the industry’s fastest switching time and highest open circuit output voltage, the VOMDA1271 is from Vishay Intertechnology. The AEC-Q102 qualified PV (photovoltaic) MOSFET driver is also the first to offer an integrated turn-off circuit in the space-saving SOP-4 package, said Vishay Semiconductors.
Designed to deliver high performance for automotive applications while increasing design flexibility and lowering costs, the VOMDA1271 includes an integrated turn-off circuit of the optocoupler which enables a turn-off time of 0.7ms typical, which is the fastest for a MOSFET driver in the compact SOP-4 footprint, confirmed Vishay.
The VOMDA1271 provides a turn-on time of 0.05ms, which is twice as fast as competing devices, said the company. It is also, said Vishay, the only driver in this package size to offer an isolation voltage of 3750V and a typical open circuit output voltage of 8.5V, which allows it to drive a variety of MOSFETs.
The AEC-Q102 qualified device is intended for use in pre-charge circuits, wall chargers and battery management systems (BMS) for electric (EV) and hybrid electric (HEV) vehicles. To generate the higher voltages needed to drive IGBTs and SiC MOSFETs in these applications, two VOMDA1271 optocouplers can be used in series. The driver enables designers to create custom solid-state relays to replace legacy electromechanical relays in next-generation vehicles.
The optically isolated VOMDA1271 features an AIGaAs infrared LED (IRLED), which emits light that is absorbed by a PV gate array, generating the voltage used to turn on a MOSFET. This construction simplifies designs and lowers costs by eliminating the need for an external power supply. For even greater design flexibility, the device can be driven by a microcontroller’s general purpose I/O pin. The optocoupler is RoHS-compliant and halogen-free.
Samples and production quantities of the VOMDA1271 are available now, with lead times of eight weeks.
