IR3510

The IR3510 Hot-Swap N+1 Redundant X-Phase^TM Controller combines input isolation control for hot-swappable applications, X-Phase^TM VRM/VRD control and active output ORing control for N+1 redundant applications. It interfaces directly with microcontroller and X-Phase^TM phase ICs to provide a full-featured and flexible solution for powering high-end CPUs and servers.

The IR3510 continuously monitors the 12V input current and VRM output voltage. Once the input current exceeds the programmable threshold, it goes into current limit mode and turns off the input MOSFETs after the OC delay times out. It immediately turns off the input MOSFETs when an over voltage (OV) condition is detected on the VRM output. It also has UVLO for both the 12V input and the supply voltage to the VRM.

The IR3510 has built-in active ORing control function for N+1 redundant applications. When the VRM output voltage is higher than the output voltage bus, it turns on the ORing MOSFETs; When the VRM output is sinking current from the output voltage bus, it turns off the ORing MOSFETs.

The IR3510 works with existing X-Phase^TM phase ICs to provide a full-featured multiphase VRM solution, including  oft-start, voltage regulation, constant current limit, remote sense and open sense leads protection.

The IR3510 interfaces with system logic to receive "ENABLE", "VSET" which is the analog reference voltage for  ontrolling VRM output voltage, constant current limit "OCPSET" and OVP limit "OVPSET". It sends back to the system; load current "IO", VRM status "VRRDY", ORing MOSFETs status "ORING" and input fault "IOCD".