The Power Manager II POWR1220AT8 provides a standard command interface to the IPMC while performing FRU specific payload power management functions using the on-chip CPLD. The POWR1220AT8 also converts all on board DC-DC converters into accurate digitally controlled supplies.
The PAC-POWR1220AT8 evaluation board allows the designer to quickly configure and evaluate the ispPAC-POWR1220AT8 device on a fully assembled printed-circuit board. The four-layer board supports a 100-pin TQFP package, pads for user I/O, a JTAG programming cable connector, and a connector for the device’s I2C interface. JTAG programming signals can be generated by using an ispDOWNLOAD® programming cable connected between the evaluation board and a PC. Both analog and digital features of the ispPACPOWR1220AT8 device can be easily configured using PAC-Designer® software.
The PAC-POWR1220AT8 evaluation board is available in a Development Kit that includes:
A hot swap controller is used to limit the inrush current when a circuit board is plugged into a powered backplane.
In addition, a hot swap controller may offer some or all of the following features: over-current protection (electronic circuit breaker), over-voltage protection, and under-voltage protection. Hot swap controllers are also required to isolate the board from the backplane which is useful in troubleshooting, maintenance, and upgrade activities. The power-down request may come from the backplane (remote) or an on-board switch (manual).
This document describes how a Lattice Power Manager II ispPAC®-POWR1220AT8 can be used to implement the functions required for 12V hot swap applications. This reference design is targeted to operate on the Power Manager Hercules Development Kit (PAC-POWR1220AT8-HS-EVN C Standard or PAC-POWR1220AT8-HA-EVN CAdvanced).
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