POWER AND LINEAR IC SOLUTIONS

Isolated MOSFET/IGBT Driver Eliminates Need for Shunt Resistor

Vishay Intertechnology’s new VO3150 is an optically isolated 0.5A MOSFET/IGBT driver with a 1.0V maximum low-level output voltage, eliminating the need for negative gate drive. Integrating a high-speed optocoupler and IGBT/MOSFET driver in one package, the new device is suited to directly driving IGBTs with ratings of up to 1200V and 50A in industrial and consumer applications.



The device consists of an LED, optically coupled to an integrated circuit, with a power output stage. This optocoupler is well-suited to driving power IGBTs and MOSFETs used in motor control inverter applications.

The high operating voltage range of the output stage provides the drive voltages required by gate-controlled devices. This provides an advantage over other MOSFET/IGBT drivers in applications that call for higher supply voltages, to enhance the performance of DMOS or IGBT power devices.

Packaged in an 8-pin DIP, the VO3150 saves board space in end products including Uninterruptible Power Supplies, AC and BrushLess DC (BLDC) motor drives, industrial inverters, SwitchMode Power Supplies (SMPS), and plasma display panels.

The device addresses a common problem with power semiconductor devices: the output voltage can drift upward when the device is run at gate-to-source voltages lower than the 20V typically specified. To avoid this condition, a typical workaround is the use of a shunt resistor at the gate driver output. Because the VO3150 does not exhibit the same upward voltage drift, this extra component is eliminated.

The VO3150 features an isolation voltage of 5300V RMS with a minimum Common Mode Rejection of 15kV/µs (30kV/µs typical) at 1500V. It enables quieter end products by operating at a high bandwidth with a switching frequency above 16kHz, which is outside the range of human hearing. It has a maximum propagation delay of only 0.7µs, a 7mA maximum supply current, and a wide operating range of 15V to 30V with UnderVoltage LockOut (UVLO) protection. It operates across the industrial temperature range of -40°C to +85°C.

Features

• Optically isolated IGBT/MOSFET gate driver
• 0.5A minimum peak output current
• 15kV/μs minimum Common Mode Rejection (CMR)
• 1.0V maximum low level output voltage eliminates need for negative gate drive
• 7mA maximum supply current
• UnderVoltage Lock-Out (UVLO) with hysteresis
• Wide operating voltage range: 15V to 30V
• 0.7μs maximum propagation delay
• Industrial temperature range: -40°C to +85°C
• RoHS-compliant

Applications

• Isolated IGBT/MOSFET gate drivers
• AC and BrushLess DC motor drives
• Industrial inverters
• Switch Mode Power Supplies (SMPS)
• Uninterruptible Power Supplies (UPS)
• Plasma displays

For further information, including the Vishay VO3150 Datasheet, please click here