LT8391AHFE#TRPBF

LED Driver IC Overview

The LT8391AHFE#TRPBF is a synchronous 4-switch buck-boost LED controller from Analog Devices Inc. It regulates LED current regardless of whether the input voltage is above, below, or equal to the output voltage. The device operates with a switching frequency of 2MHz and supports a maximum input voltage of 60V. It features analog and PWM dimming capabilities for precise light control. The component is housed in a 28-TSSOP-EP package, designed for efficient power conversion in lighting applications.

LED Driver IC Feature Summary

• Synchronous 4-switch buck-boost topology enables regulation across varying input and output voltage conditions
• Supports both analog and PWM dimming methods for flexible brightness control
• Integrated high-frequency switching reduces external component size and improves efficiency

LED Driver IC Applications

• LED lighting systems requiring wide input voltage ranges
• Display backlight drivers for portable and industrial equipment
• Automotive LED illumination circuits

LED Driver IC Procurement Notes

Verify the exact part number suffix against official Analog Devices documentation to confirm package type and tape-and-reel specifications. Ensure that the procurement source provides valid manufacturer authorization or traceability records. Cross-reference the datasheet revision date to guarantee compatibility with current design requirements and regulatory standards.

LED Driver IC Selection Notes

Select this component when the application demands regulation of LED current despite significant fluctuations between input and output voltages. The 2MHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal performance of the 28-TSSOP-EP package relative to the expected power dissipation in the target enclosure.

LED Driver IC Part Context

This part belongs to the LT8391A family of synchronous buck-boost controllers. It is specifically engineered for LED driver applications where input voltage stability cannot be guaranteed. The 'HFE' designation indicates the specific temperature grade and package variant, while '#TRPBF' denotes the tape-and-reel packaging format for automated assembly.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult Analog Devices directly for qualified replacements or pin-compatible alternatives that meet the same electrical and thermal specifications.