Reference Design Library > Power Management > OR-ing Controllers > DC1899A-B: 12 V, 9 A OR'ing Controller

DC1899A-B: 12 V, 9 A OR'ing Controller

Summary

Demonstration circuit 1899A controls two independent power rail circuits each with Hot Swap™ and ideal diode functionality provided by the LTC4228-1/LTC4228-2 dual ideal diode and Hot Swap controller.

DC1899A facilitates evaluation of LTC4228 performance in different operation modes such as supply ramp-up, power supply switchover, steady state, and overcurrent faults. Power supply switchover mode can be realized as either an ideal diode or as a prioritizer.

Each DC1899A circuit is assembled to operate with a 12V supply and 9A maximum current load. The main components of the board are the LTC4228 controller, two MOSFETs operating as ideal diodes, two MOSFETs operating as Hot Swap devices, two current sense resistors, two jumpers for independently enabling each rail, six LEDs to indicate status, power good and fault conditions separately for each channel, and input voltage snubbers. There are pads for optional RC circuits for each Hot Swap MOSFET gate in order to adjust output voltage slew rate. In addition to this there are jumpers allowing monitoring of supply undervoltage conditions at either IN or SENSE+ pins.

The standard configuration (as DC1899A populated by default) places the ideal diode MOSFET ahead of the Hot Swap MOSFET. The board also has pads for an alternative configuration with the Hot Swap MOSFET located ahead of the ideal diode MOSFET.

Specifications

Manufacturer Analog Devices Inc.
Category Power Management
Sub-Category OR-ing Controllers
Eval Board Part Number DC1899A-B-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Normally In Stock
Current Out 9 A
Voltage Out 12 V
Supply Voltage 12 V
Features Current Limit (Adj. or Fixed)
Power Good Output
Shutdown, Enable, Standby
Status Indication
Under Voltage Protection, Brown-Out
Quiescent Current [Typical] - Not Given
Component Count + Extras 49 + 43
Application / Target Market Power: Auxiliary Power Supply
Servers
Smart Building Controls
Telecom
Design Author Linear Technology
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part LTC4228 -2
Date Created By Author 2011-10
Date Added To Library 2014-01

Eval Board

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Support Documents & Media

DC1899A-B - User Guide LTC4228-2 - Datasheet

Media

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