DS3991Z+HB

Overview

The DS3991Z+HB is a two-channel push-pull controller designed for cold cathode fluorescent lamp (CCFL) applications. It operates within a supply voltage range of 4.5V to 5.5V and supports frequencies between 40kHz and 80kHz. The device features integrated dimming control capabilities and is housed in a compact surface-mount package suitable for space-constrained designs.

Feature Summary

• Dual-channel push-pull output architecture for driving CCFL backlights
• Integrated analog dimming control functionality
• Operates at standard CCFL frequencies up to 80kHz

Applications

• LCD panel backlighting systems
• Portable electronic display devices
• Industrial monitor illumination

Procurement Notes

Verify the specific suffix HB against official Analog Devices documentation to confirm exact pinout and thermal characteristics. Confirm RoHS compliance status and check for obsolescence notices, as Maxim Integrated products may have varying lifecycle statuses across different packaging variants.

Selection Notes

Select this component when dual-channel CCFL drive with integrated dimming is required. Ensure the operating frequency range matches the selected lamps. Verify that the 4.5V to 5.5V supply voltage aligns with the system power design constraints.

Part Context

This part belongs to the Maxim Integrated CCFL controller family, which provides specialized solutions for lighting applications. These controllers are designed to replace discrete driver circuits, offering reduced board space and simplified design integration for display manufacturers.

Replacement Considerations

Consult official substitution lists for direct equivalents. Generic replacements may not match the specific push-pull topology or dimming interface requirements.