BH6941KN-E2

Overview

The BH6941KN-E2 is a four-output DC-DC regulator IC manufactured by ROHM Semiconductor, designed specifically for LCD backlight LED driving applications. It utilizes a switched capacitor charge pump topology to generate stable output voltages. The device operates within an input voltage range of 2.8 V to 4.5 V and features a switching frequency of 1.2 MHz. Each output channel provides a fixed voltage of 4.5 V with a maximum output current capability of 20 mA per channel. The IC integrates internal switches and is housed in a compact 20-VQFN package suitable for surface mount technology.

Feature Summary

• Four independent output channels providing fixed 4.5 V regulation for multi-string LED arrays
• Switched capacitor charge pump topology eliminates the need for external inductors
• Integrated internal switches reduce component count and simplify PCB layout
• High switching frequency of 1.2 MHz allows for the use of small passive components

Applications

• LCD panel backlight driver circuits
• Portable electronic device display illumination systems
• Multi-channel LED lighting modules requiring regulated voltage sources

Procurement Notes

Verify product status carefully as this component may be classified as obsolete or end-of-life. Confirm availability through authorized distributors only, as supply is restricted. Ensure that any substitute parts maintain compatibility with the original design specifications regarding pinout, electrical characteristics, and thermal performance before implementation.

Selection Notes

Select this IC when designing LED drivers for LCD backlights requiring multiple regulated outputs without inductive components. It is suitable for applications where space constraints favor a charge pump solution over traditional buck converters. Ensure the input power supply can support the required current draw across all four channels while maintaining voltage stability within the specified operating range.

Part Context

This component belongs to the BH6941 series of LED lighting driver ICs from ROHM Semiconductor. These devices are engineered for efficient power management in portable electronics. The BH6941KN-E2 variant specifically offers four regulated outputs, distinguishing it from single or dual-output counterparts in the same family, making it ideal for complex display architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the potential end-of-life status, engineering teams should evaluate alternative ROHM products or third-party equivalents that match the 20-VQFN footprint and 4.5 V/20 mA per channel specifications.