STMicroelectronics L6983I
The L6983I is a device specifically designed for 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 -4.5 A (even during soft-start) allows a proper energy transfer to the secondary side as well as enabling a tracked soft-start of the secondary output.| Part No. | L6983I |
|---|---|
| Datasheet | L6983I Download |
| Manufacturer |  STMicroelectronics |
| Description | 10W synchronous iso-buck converter |
| Buy | Stock & Price |
FEATURES
● Designed for iso-buck topology● 3.5 V to 38 V operating input voltage
● Primary output voltage regulation / no optocoupler required
● 4.5 A source / sink peak primary current capability
● Peak current mode architecture in forced PWM operation
● 390 ns blanking time
● 200 kHz to 1 MHz programmable switching frequency. Stable with low ESR capacitor: min 2 µF
● Internal compensation network
● 2 μA shutdown current
● Internal soft-start
● Enable
● Overvoltage protection
● Output voltage sequencing
● Thermal protection
● Optional spread spectrum for improved EMC
● Power Good
● Synchronization to external clock
● QFN16 (3x3 mm) package
APPLICATIONS
● Isolated IGBT/SiC MOSFET gate drive supply● OBC (On-board charger) for HEV/EV
● Electric traction systems
DESCRIPTION
No optocoupler is required. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The 390 ns blanking time filters oscillations, generated by the transformer leakage inductance, making the solution more robust.
