BD94121F-GE2

Overview

The BD94121F-GE2 is a current resonance type white LED driver IC designed for large LCD applications, manufactured by Rohm Semiconductor. It features a single-channel push-pull control topology and operates within a supply voltage range of 9.0V to 18.0V. The device supports a switching frequency adjustable up to 300kHz and maintains a typical operating current of 2.3mA. It is housed in an SOP-18 package with dimensions of 11.20mm x 7.80mm x 2.01mm and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Supports direct connection to PFC circuits using a half-bridge structure to reduce external component count
• Provides current and voltage feedback through driving frequency adjustment
• Enables analog dimming via external DC signals and burst control via external PWM signals
• Integrates protection mechanisms including over-voltage protection, under-voltage detection, and LED open/short circuit protection

Applications

• Television displays
• Computer monitors
• LCD backlight systems

Procurement Notes

Verify the specific suffix 'GE2' against the manufacturer's official documentation to ensure compatibility with RoHS standards and packaging requirements. Confirm that the SOP-18 package dimensions align with PCB layout constraints. Check for any design-in restrictions or lifecycle status updates directly from Rohm Semiconductor before finalizing procurement plans.

Selection Notes

Select this component for applications requiring direct PFC integration and low standby power consumption. Ensure the input voltage range of 9V to 18V matches the system's PFC output. Consider the 2.3mA operating current for efficiency requirements. Verify that the single-channel output configuration meets the LED array drive needs without requiring additional parallel drivers.

Part Context

The BD94121F-GE2 belongs to the BD9412 series of current resonance type white LED drivers developed for large LCD panels. It shares functional similarities with the BD9412F and BD94122F but differs in specific operating current characteristics. This series is engineered to simplify circuit design by minimizing external components while maintaining high reliability for display backlighting applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.