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Product Detailed Parameters
- Description：IC OFFLINE SWITCH FLYBACK 24SOP
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT)
- Output Isolation：Isolated
- Internal Switch(s)：No
- Voltage - Breakdown：-
- Topology：Flyback
- Voltage - Start Up：13.5 V
- Voltage - Supply (Vcc/Vdd)：8V ~ 24V
- Duty Cycle：94%
- Frequency - Switching：120kHz
- Fault Protection：Current Limiting, Over Voltage
- Control Features：-
- Operating Temperature：-40°C ~ 85°C (TA)
- Package / Case：24-SOIC (0.213", 5.40mm Width)
- Supplier Device Package：24-SOP
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：-
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Overview
The BM1051F-GE2 is a composite LSI integrating a Power Factor Correction (PFC) converter and a Quasi-Resonant DC/DC converter. It features an integrated 650V high-voltage startup circuit, eliminating the need for external bias power supplies. The PFC section utilizes peak current control with AC voltage compensation, while the DC/DC section employs quasi-resonant soft-switching to reduce EMI. Operating frequencies reach up to 120 kHz. The device supports SOP-24 packaging and functions within a temperature range of -40°C to +85°C.
Feature Summary
- Integrates PFC and quasi-resonant DC/DC converters in a single LSI
- Includes built-in 650V high-voltage startup circuit
- Features peak current control for PFC with AC voltage compensation
- Supports pulse-train mode for reduced light-load consumption
Applications
- AC/DC power supplies requiring high power factor correction
- Adapters and chargers utilizing quasi-resonant topologies
- General-purpose isolated DC/DC conversion systems
Procurement Notes
Verify component status before design finalization as availability may vary. Confirm package dimensions and thermal requirements against PCB layout constraints. Ensure compatibility with external MOSFET selection for both PFC and DC/DC stages. Review datasheet protection features including over-current and over-voltage settings for system safety compliance.
Selection Notes
Select this component for designs requiring integrated PFC and QR DC/DC functionality without external bias circuits. Suitable for applications needing low EMI through quasi-resonant switching. Consider external MOSFET ratings as the IC does not include internal switches. Evaluate thermal performance given the SOP-24 package size and operating temperature range.
Part Context
Part of the BM1051 series from ROHM Semiconductor, designed for efficient AC/DC conversion. Combines PFC and DC/DC stages to simplify power supply architecture. Targets applications demanding high efficiency and low electromagnetic interference through advanced switching techniques.
Replacement Considerations
No direct public substitute part numbers are confirmed in available documentation. Design changes may be required when transitioning to alternative components due to differences in integration levels and pin configurations.
