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HYM1422 Hot Swap Controller

2015-03-02 18:21  
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The HYM1422 is an integrated 2.7V to 12V hot swap controller. This device allows a board to be safely inserted and removed from live backplanes. This is achieved using a pass FET with a current control loop that using a sense resistor, we can monitor the input current. The board supply voltage can be ramped up at a programmable rate using an external N-channel MOSFET and capacitor. The RESET pin output can be used to generate a system reset when the supply voltage falls below a programmable voltage. The ON pin is the control input for the device and also acts as a soft reset.
HYM1422 Hot Swap Controller circuit schematic
This device can be used in many application such as Hot-Swap/Plug/Dock Power Management, Network Switches, Routers, Hubs, and Electronic Circuit Breaker.

This device also supported with many features such as provide safe hot swap for 2.7V to 12V power supplies with few external components, user-programmable supply voltage power-up rate, charge pumped gate drive for external N-FET switch, undervoltage lockout, soft reset input and glitch filter on RESET, programmable circuit breaker, and system reset output with programmable delay. This device also available in 8-pin PDIP and SOP packages. [Source: Haoyu Microelectronics]

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