ZM7300G Series Digital Power Manager
Data Sheet
9
Typical Application
DPM
Power-Up
Reset
(Required)
Figure 3. Typical Application Schematic of Multiple Output System with Digital Power Manager and I C Interface
2
The schematic of a typical application of a ZM7300 digital power manager (DPM) is shown in Figure 3.
The system includes four groups of Z-One Point Of Load converters (POLs). A group is defined as one
or more POL converters interconnected via OK pins. Grouping of the POLs enables users to program
advanced fault management schemes and define margining functions, monitoring, startup behavior, and
reporting conventions.
All Z-One POL converters are connected to the DPM and to each other via a single-wire
synchronization/data (SD) line. The line provides synchronization of all POL converters to the master
clock generated by the DPM and simultaneously carries bidirectional data transfer between POL
converters and the DPM. The DPM communicates via the I
2
C bus with the host system and/or the
Graphical User Interface.
In this application, besides Z-One POL converters, the DPM also controls and monitors two auxiliary
devices – a Voltage Regulation Module (VRM) and a Low Dropout Regulator (LDO). While these
devices are not Z-One compliant and may not even be manufactured by Power-One, they are integrated
into the system by communicating with the DPM via their Enable pins connected to ENX outputs of the
DPM. In addition, the DPM monitors status of the auxiliary devices via its PGX inputs connected to
Power Good and Error Flag outputs of the auxiliary devices. The DPM can control and monitor four or
more independent auxiliary devices.
ZD-00896 Rev. 5.1, 13-Jul-10
www.power-one.com
Page 7 of 33
POWER-ONE [ POWER-ONE ]
