HV power management chips for telecom equipment supports PMBus

National Semiconductor Corp. has introduced two new high-voltage system power management and protection integrated circuits (ICs) with on-chip power management bus (PMBus) support. The 48V input voltage LM5066 and -48V input voltage LM5064 has protection and management functions for measuring, controling and managing the electrical operating conditions in telecom systems such as routers, switches and base stations. The LM5066 and LM5064 are suggested for use in designing wired and wireless telecom infrastructure systems that operate from high-voltage system backplanes. The LM5066 and LM5064 uses industry-standard PMBus interface that is software-compatible with National's entire family of system protection and management products. The LM5066 and LM5064 precisely measure the power to each card or block while continuously protecting against damaging inrush current surges due to hot swap or transient events that damage downstream components. The new ICs use National's hot swap architecture that continuously monitors and limits both system current and power while accurately measuring power consumption and fault conditions. The ICs continuously supply the system management host with real-time power, voltage, current, temperature and fault data for each node in the system. The system management bus (SMBus) communications interface delivers this data via the PMBus protoc...