Analog Devices LT8550 | Demoboard DC2331A-B

Description

Demonstration circuit 2331A-A/2331A-B is a 4-phaseDC/DC expander with internal gate drivers for buck converters that features the LT®8550. The demonstration circuit expands (increases) the number of power sections for a LT3763 60V step-down controller to provide higher output power. The increased number of power sections allowed by the LT8550 results in more available output power without a corresponding increase in the difficulty of the design or a sacrifice of LT3763 features. The demo board uses the multi-chip (master-slave) feature of the LT8550 so the total number of power sections can be increased in four power section increments:• DC2331A-A has one power section for the LT3763 primary controller and an additional four power sectionsfor its LT8550 which is configured as a master• DC2331A-B does not have a primary controller, andits LT8550 is configured as a slave with four powersections

Features

• Expands Up to Four Phases per Chip
• Up to 80V Input or Output Voltage
• Cascade with Multiple Chips for Very High Current Applications
• Supports Up to 18 Distinct Phases from 20° to 180°
• Phases Can Share Phase Angle
• Excellent DC and Transient Current Sharing
• Phase-Lockable Fixed Frequency 125kHz to 1MHz
• Supports Bidirectional Current Flow
• RSENSE or DCR Current Sensing
• Eliminates the Need to Route Sensitive Feedback and Control Signals
• 52-Lead (7mm × 8mm) QFN Package

Typical applications

• High Current Distributed Power Systems
• Industrial and Automotive
• Telecom, Datacom, and Storage Systems

More information

• Datasheet
• IC product information