STEVAL-A6986IV1

38V, 2A synchronous step-down isolated buck regulator evaluation board based on A6986I. A6986I is an automotive-grade device specifically designed for the isolated buck topology. The 100% duty cycle capability and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. No optocoupler is required. The primary sink capability up to 1.5A (even during soft-start) allows a proper energy transfer to the secondary side as well as enables a tracked soft-start of the secondary output.

• 4V 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
• 300ns blanking time
• 8µA IQ-SHTDWN
• Adjustable switching frequency and synchronization
• Embedded primary output voltage supervisor
• Adjustable soft-start time
• Internal primary current limiting, overvoltage protection, thermal shutdown