Power controller IC performs tight regulation of auxiliary power supplies
The BD28C5xH/LFJ-LB family of power controllers from ROHM Semiconductor is supplied in various versions to meet the different protection threshold requirements of silicon MOSFETs, IGBTs and silicon carbide MOSFETs.
ROHM Semiconductor has released a new family of PWM controller ICs for auxiliary dc-dc power supplies in industrial applications.
The BD28C5xH/LFJ-LB controllers have tight, accurate electrical characteristics which enable power-system designers to reduce component count and bill-of-materials cost while improving system performance.
The variants in the BD28C5xH/LFJ-LB family offer different under-voltage lockout thresholds, making them suitable for different types of power switch and providing valuable design flexibility.
The power controllers are pin-compatible with competing controllers available on the market today. The controllers are supplied in an SOP-J8 package measuring 4.9 mm x 6.0 mm x 1.65 mm.
| Part Number | Under-voltage Lockout Threshold | Target Power Device Type |
| BD28C55FJ-LB | 8.4 V/7.6 V | Silicon MOSFET |
| BD28C54FJ-LB | 14.5 V/9.0 V | Silicon MOSFET or IGBT |
| BD28C57LFJ-LB | 18.8 V/14.5 V | Silicon carbide MOSFET |
| BD28C57HFJ-LB | 18.8 V/15.5 V | Silicon carbide MOSFET |