General Description

The SMH4804EVAL kit is a fully functional printed circuit board designed to demonstrate all the features of the SMH4804 Nonvolatile -48V Hot-Swap (live-insertion) Controller. The circuit operates over the full Telecom supply range of -32 to -72VDC, soft-starting loads of up to 10 amperes. The SMH4804EVAL also manages the power-on sequencing of up to external 4 DC-DC converters in addition to many other useful Hot-Swap functions.

Several key, user-configurable functions are: User-Configurable under-voltage, over-voltage and over-current limits. 'Power Good' (PG#1-PG#4) outputs with programmable delay time to assertion. Inputs for 'Short-Pin' or ejector switch card removal detection. Programmable over-current filter response time to prevent nuisance tripping. User-Configurable 'Forced Shutdown' pin allows secondary-side fault detection and orderly shutdown.

Additional features included on the EVAL board: EZ connect Power and Signal pins User-Programmable Interface connector to digitally control analog hot-swap functions Piggy-back mounting pins for a DC-DC Converter 4 Optically-Isolated DC-DC Converter Enable signals 1 Optically-Isolated SMH4804 Shutdown interface

Evaluation Kit Contents

• Fully Functional SMH4804 Evaluation Board.
• SMH4804 Evaluation Kit User's Guide.
• Dongle Programmer Interface Card.
• Dongle to I²C Interface Cable (1 meter).
• One CD-ROM disk containing: SMH4804 EV Gerber Files, GUI Software, Hex file, Application Notes/Briefs.

SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission.

SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances.

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