Summit Microelectronics - Applications Note 30

Tech Support: Applications Note 30
SMH4804 -48V Programmable Hot Swap Sequencing Power Controller -48V Hot-Swap Controller Features Simple Software I²C Power-On/Off Interface

Application Note 30

1 2 3 4 5

SPECIAL NOTE: The HTML version of the application note has been divided into multiple pages to follow the PDF version. You may use the menu here to jump to any of the other pages. You may also download/view the entire application note in PDF format [PDF format].

SMH4804 -48V Programmable Hot Swap Sequencing Power Controller

PAGE 2

Once fault latching is enabled and an overcurrent fault occurs, the SMH4804 sets the non-volatile fault latch (Figure 2) bit (Register C, bit 0) to a '1'. Once this bit is set, the SMH4804 shuts down gate drive to the external MOSFET thus removing power from the system.

The SMH4804 remains in a 'powered-down' state until the fault bit is cleared (Figure 3) and the fault is removed. Remember to click the 'Write Config' radio button to commit the new setting (fault bit cleared) to the non-volatile register location (Register C, bit 0).

Figure 2: Fault Event Recorded by the SMH4804.

NOTICE

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.

Revision 1.0 - This document supersedes all previous versions and covers Windows GUI revision 2.3.0 and later. Please check the Summit Microelectronics, Inc. web site at www.summitmicro.com for updates.

return to top

home

technical support