MC34845AEP

LED Driver IC Overview

The MC34845AEP is a six-channel LED backlight driver IC manufactured by NXP Semiconductors. It functions as a DC-DC step-up regulator with an integrated boost topology and internal switches. The device supports PWM dimming and delivers up to 2.3A per switch channel. It operates within a supply voltage range of 5V to 21V and dissipates up to 3.4W of power. The component is housed in a 24-pin QFN-EP (4x4mm) package, suitable for surface mount installation, and is rated for operating temperatures between -40°C and +85°C.

LED Driver IC Feature Summary

• Integrates a six-channel boost converter with internal power switches for compact LED backlighting solutions
• Supports pulse-width modulation (PWM) dimming for precise brightness control across all channels
• Features a low-profile 24-pin QFN-EP package designed for efficient thermal dissipation in space-constrained designs

LED Driver IC Applications

• LCD panel backlighting for portable electronic devices
• LED illumination systems requiring multi-channel regulation
• Embedded display drivers in industrial or automotive interfaces

LED Driver IC Procurement Notes

Verify part status carefully as the MC34845AEP is listed as obsolete by the manufacturer. Confirm availability through authorized distributors or secondary markets if immediate procurement is required. Ensure compatibility with existing PCB footprints and design specifications before sourcing, as replacement components may require schematic adjustments.

LED Driver IC Selection Notes

Select this component for applications requiring a single-chip solution for multiple LED strings without external inductors or switches. Consider the 2.3A current limit and 21V maximum input voltage when designing the power stage. Evaluate the QFN-EP package for thermal management requirements and ensure the design accommodates the specified operating temperature range.

LED Driver IC Part Context

This device belongs to the MC34845 family of LED lighting drivers from NXP Semiconductors. It is specifically engineered for low-cost, high-efficiency backlighting applications. The series typically includes variants with different packaging or suffixes, but the AEP designation specifies the standard 24-QFN-EP configuration used in modern consumer electronics.

LED Driver IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the component is obsolete, engineers must evaluate pin-compatible alternatives or redesign the power stage using newer generation LED drivers from NXP or other manufacturers.