STMicroelectronics L6986I
The L6986I is a device specifically designed for the isolated buck topology. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. The primary sink capability up to 1.9 A (even during softstart) allows a proper energy transfer to the secondary side as well as enables a tracked soft-start of the secondary output.| Part No. | L6986I |
|---|---|
| Datasheet | L6986I Download |
| Manufacturer |  STMicroelectronics |
| Description | 38V 5W synchronous iso-buck converter |
| Buy | Stock & Price |
FEATURES
● Designed for iso-buck topology● 4 V to 38 V operating input voltage
● Primary output voltage regulation / no optocoupler required
● 1.9 A typical sink peak primary current capability
● Peak current mode architecture in forced PWM operation
● 300 ns blanking time
● 8 µA IQ-SHTDWN
● Adjustable fSW and synchronization
● Embedded primary output voltage supervisor
● Adjustable soft-start time
● Internal primary current limiting
● Overvoltage protection
● RDS(on) HS = 180 mΩ, RDS(on) LS = 150 mΩ
● Thermal shutdown
APPLICATIONS
● Isolated power supply for SiC MOSFET and IGBT drivers● Isolated power supply for isolated interfaces (RS232, I2C, SPI, etc.)
● EV chargers
● Motor drivers
● Automation
● UPS
● Solar converters
● Welding
DESCRIPTION
Due to the P-Channel MOSFET as high-side power switch the device features 100% duty cycle operation. No optocoupler is required. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The 300 ns blanking time filters oscillations, generated by the transformer leakage inductance, making the solution more robust.
