BD9470AEFV-E2

Overview

The BD9470AEFV-E2 is a white LED driver IC from ROHM Semiconductor, designed for high-isolation applications. It features a Boost topology with six output channels capable of delivering up to 250 mA per channel. The device operates within an input voltage range of 9 V to 35 V and supports adjustable output voltages. Key electrical parameters include a switching frequency of 150 kHz and a maximum power dissipation of 4.7 W. It functions reliably across temperatures from -40°C to +85°C and is housed in an HTSSOP-B-28 package.

Feature Summary

• Integrates two-channel control with high-speed isolators rated at 2500 Vrms for enhanced safety in isolated designs.
• Provides constant current regulation for multiple LED strings via a Boost converter topology.
• Supports analog or PWM dimming methods for precise brightness control.

Applications

• High-voltage isolation LED lighting systems
• Industrial backlighting requiring galvanic isolation
• Medical imaging equipment illumination

Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before procurement. Confirm that the HTSSOP-B-28 package dimensions align with existing PCB footprints. Ensure design reviews account for the 4.7 W power dissipation limits and thermal management requirements within the specified operating temperature range.

Selection Notes

Select this component when high-voltage isolation between control and LED sides is mandatory. The 2500 Vrms isolation rating distinguishes it from standard LED drivers. Consider the 6-output capacity and 250 mA limit against total load requirements. Verify compatibility with the 9–35 V input supply range and 150 kHz switching frequency constraints.

Part Context

This part belongs to ROHM's white LED driver series, specifically engineered for applications demanding electrical isolation. It complements other non-isolated boost drivers by adding significant safety margins through integrated high-speed isolation technology, suitable for environments where ground loops or high common-mode voltages are present.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific model. Due to its unique combination of 6-channel output and 2500 Vrms isolation, alternative selection requires redesigning the isolation barrier and verifying equivalent current capabilities.

FAQ

What is the isolation voltage rating of the BD9470AEFV-E2?

The device incorporates high-speed isolators with a rating of 2500 Vrms.

Is the BD9470AEFV-E2 recommended for new designs?

No, the product status is listed as NRND (Not Recommended for New Designs).