LT3804

PRODUCTION

Secondary Side Dual Output Controller with Opto Driver

Part Models: 2
1ku List Price: Starting From $6.44

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Overview

Regulates Two Secondary Outputs
Optocoupler Feedback Driver and Second Output Synchronous Driver Controller
True Differential Remote Sensing Regulation
High Switching Frequency: up to 800kHz
Programmable Current Limit
Programmable Soft-Start and Power Good
Automatic Frequency Synchronization
Available in Thermally Enhanced 28-Lead TSSOP

The LT3804 is a high efficiency step-down switching regulator with optocoupler feedback control for regulating multiple outputs in single-secondary winding isolated power supplies.

The LT3804 contains an error amplifier and an optocoupler driver to regulate the first (main) output. For the second output regulation, the LT3804 contains a complete PWM controller to drive dual synchronous N-channel MOSFETs. With leading edge modulation, it operates with either current or voltage mode control of the primary side. The LT3804 is synchronized to the falling edge of the transformer secondary winding and can be used in single ended or double-ended isolated power converter topologies. A user selectable discontinuous conduction mode improves light load efficiency.

True differential Kelvin sensing is used for each output feedback amplifier to achieve high regulation accuracy and design simplicity. Other features include soft start, current limit and power good flags.

Applications

48V Input Isolated DC/DC Converters
Multiple Output Power Supplies
Offline Converters
DC/DC Power Modules

Part Models: 2
1ku List Price: Starting From $6.44

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT3804EFE#PBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT3804EFE#TRPBF	28-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LT3804EFE#PBF	PRODUCTION
LT3804EFE#TRPBF	PRODUCTION