ZM7300G Series Digital Power Manager

Data Sheet

REV. 3.3 NOV 26, 2007

www.power-one.com

Page 7 of 32

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Typical Application

Figure 3. Typical Application Schematic of Multiple Output System with Digital Power Manager and I

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

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.

The DPM can also trigger an optional crowbar circuit and provide undervoltage and overvoltage protections of the

intermediate bus voltage. In addition, the DPM can be controlled by a host system via the interrupt inputs, RES_N

and the ACFAIL_N inputs.