ROHM BM1Q011FJ-E2, AC-DC Converter 7-Pin, SOP-J7S

The ROHM BM1Q011FJ-E2 is a quasi-resonant control type AC-DC converter IC designed for power supply systems that plug into mains outlets. It incorporates a built-in 650 V start-circuit and supports quasi-resonant switching to minimise EMI and standby power consumption. With operation down to a light load via burst mode and comprehensive protection features (over-current limiter, over-voltage protection, soft-start, CS-open protection), this one-chip controller is well-suited for compact power adapters and industrial supply designs.

Key Features and Benefits Include

• Quasi-resonant switching: lowers EMI and improves efficiency.
• Built-in 650 V tolerant start-circuit: supports direct AC mains start-up.
• Light-load burst mode operation: reduces standby power consumption.
• Wide supply range 8.9 V to 26 V (VCC) and switching frequency up to 120 kHz.
• Auto-restart protection for overload, over-voltage and CS-open faults.
• Compact SOP-J7S 7-pin surface-mount package enables space-efficient PCB layout.

Optimised for Efficient Power-Supply Design

By utilising quasi-resonant control, the BM1Q011FJ-E2 facilitates soft switching, reducing switching losses and lowering EMI, a favourable characteristic for modern power supplies in consumer, industrial, and commercial equipment. The integrated protections mitigate typical startup and fault conditions, simplifying the overall supply design and improving reliability. Additionally, its burst-mode light-load capability helps meet stringent energy-efficiency regulations for standby power consumption.

Application Potential of the ROHM AC-DC Converter 7-Pin, SOP-J7S

• Offline AC-DC power adapters and chargers (universal 100-240 V).
• Industrial and consumer power supply units.
• Standby and low-load power supplies.
• Compact PCB designs.

For more information please check the datasheets.