High-performance hot swap and ORing controller for high power telecom systems

The Texas Instruments TPS23523 is an integrated hot swap and OR-ing controller that allows high power telecom systems to comply with stringent transient requirements. The 200V absolute maximum rating makes it easier to survive lightning surge tests (IEC61000-4-5). The soft start cap disconnect allows for the use of smaller hot swap FETs by limiting the inrush current, without hurting the transient response. The dual hot-swap gate driver saves space and BOM cost in high power applications that require multiple hot swap FETs. The 400µA sourcing current enables fast recovery, which helps to avoid system resets through lightning surge tests. The dual current limit helps make it easier to pass brown outs and input steps such as required by the ATIS 0600315.2013. Lastly, it allows accurate undervoltage and overvoltage protection with programmable thresholds and hysteresis. The device integrates an OR-ing controller, making it ideal for 48V systems that require reverse hook-up protection and reverse-current protection. The OR-ing controller protects the output when the input drops avoiding system resets.