STEVAL-L6986IV1

STEVAL-L6986IV1 is a 38V, 5W synchronous iso-buck converter evaluation board with dual isolated output based on the L6986I. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is generated by using a transformer. No optocoupler is required. The primary sink capability (typ. 1.9 A) allows proper energy transfer to the secondary side as well as a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The STEVAL-L6986IV1 evaluation board generates two isolated voltages (positive around 18V and negative between 4 and 5V), particularly suitable for supplying the IGBT/SiC MOSFET gate driver for multiple applications. A simple by-pass enables the supply of a single isolated voltage.

• Designed for iso-buck topology
• 4 to 38V operating input voltage
• Primary output voltage regulation/no optocoupler required
• 1.9A typical sink peak primary current capability
• Peak current mode architecture in forced PWM operation
• 300 ns blanking time
• Adjustable fSW and synchronization
• Embedded primary output voltage supervisor
• Adjustable soft-start time, internal primary current limiting and overvoltage protection
• Thermal shutdown