BD9423EFV-E2

Overview

The BD9423EFV-E2 is a standard boost LED lighting driver IC manufactured by ROHM Semiconductor. It features six independent output channels capable of delivering up to 400 mA per channel. The device operates within an input voltage range of 9 V to 35 V and supports adjustable output voltages. Designed for surface-mount applications, it utilizes a 40-pin HTSSOP-B package with exposed pad thermal dissipation. The integrated DC-DC regulator functions at a switching frequency of 200 kHz. It supports analog and PWM dimming control methods and maintains operation across a temperature range of -40°C to +85°C.

Feature Summary

• Six-channel constant current regulation for multi-string LED arrays
• Integrated step-up (boost) topology with internal power switches
• Supports both analog and pulse-width modulation dimming interfaces
• Built-in thermal protection and over-current safeguard mechanisms

Applications

• LED backlighting systems for displays
• General solid-state lighting fixtures
• Automotive interior illumination modules
• Commercial high-bay LED luminaires

Procurement Notes

Verify component authenticity through authorized distribution channels prior to integration. Confirm that the specific suffix matches project requirements. Check current lifecycle status as some variants may be designated as not recommended for new designs. Ensure proper handling procedures are followed due to moisture sensitivity classification. Validate supply chain documentation against official manufacturer records.

Selection Notes

Evaluate thermal management capabilities given the 4.7 W power dissipation rating in the specified package. Assess compatibility with existing control logic for analog or PWM dimming signals. Consider the 9 V minimum input requirement when designing the power stage. Verify that the 400 mA per channel limit aligns with target LED string configurations. Review layout guidelines for the HTSSOP-B footprint to ensure optimal heat transfer.

Part Context

This component belongs to ROHM's dedicated LED driver series designed for high-efficiency lighting solutions. It integrates power management and control logic into a single compact package. The device addresses the need for precise current regulation in multi-channel applications. It replaces discrete solution architectures by consolidating boost conversion and driver functions.

Replacement Considerations

BD9422EFV-E2: Offers similar functionality but may differ in switching frequency or pinout configuration. Verify electrical parameters and mechanical dimensions before substitution.