ZM7304G-65503Y-Q1 POWER-ONE [Power-One], ZM7304G-65503Y-Q1 Datasheet - Page 23

• Manufacturer Part Number: ZM7304G-65503Y-Q1
• Description: Digital Power Manager
• Manufacturer: POWER-ONE [Power-One]

When propagation is enabled, the faulty POL converter pulls its OK pin low. A low OK line initiates turn-off of
other POL converters in the group and signals the DPM to pull other OK lines low to initiate turn-off of other POL
converters as programmed.
The regular turn-off of a POL converter means that the output voltage is ramping down according to its turn-off
delay and falling slew rate settings. If a POL converter triggers an undervoltage or overtemperature fault, it will
initiate the regular turn-off. In the case of an overcurrent or tracking fault, the POL converter initiates the fast turn-
off by opening both high and low side switches instantaneously. If either output overvoltage or phase voltage
errors are triggered, the faulty POL converter initiates the fast turn-off and turns on its low side switch. In addition,
when an error is propagated, the DPM can generate commands to turn off a front end (a DC-DC converter
generating the intermediate bus voltage) and trigger an optional crowbar protection to accelerate removal of the
intermediate bus voltage (IBV).
Once the fault has recovered in the faulty POL converter, the other POL converters will turn on in a controlled
manner according to their turn-on delay and rising slew rate settings.
10.5.2 Margining
Margining can be executed separately for each group by clicking an appropriate radio button in the GUI IBS
monitoring window shown in Figure 11 or directly via the I
in a group are margined in the same direction (up or down) by the percentage programmed individually for each
POL converter.
10.5.3 Turn-ON and Turn-Off
Automatic turn–on upon application of the input voltage is enabled by checking the Auto Turn-On bit in the GUI
Group Configuration window shown in Figure 10. Turn-on and turn-off of various groups during the operation is
controlled from the GUI IBS Monitoring window or directly via the I
10.5.4 Interrupt Configurations
The DPM has four interrupt inputs that can be programmed to:
The two functions are mutually exclusive – an interrupt can be either programmed as an Inhibit or as a Group
Reprogramming Trigger.
The interrupts are programmed in the GUI Interrupt Configuration window shown in Figure 18 or directly via the I
bus by specific commands. In Figure 18 the Interrupt 0 is programmed as the inhibit for group A and the Interrupt
2 is programmed as the group C reprogramming trigger.
10.5.4.1
An interrupt input can be programmed to act as an inhibit on a single or multiple groups of POL converters. When
the interrupt input is pulled low, the DPM will pull the appropriate OK lines low. The affected POL converters will
execute regular turn-off ramping their output voltages down according to the turn-off delay and falling slew rate
settings. Once the interrupt is released, the POL converters will automatically turn-on according to their turn-on
delay and rising slew rates settings.
The inhibit function can be used for a variety of applications, such as
REV. 3.3 NOV 26, 2007
Group Inhibit
•
•
•
Inhibit the operation of one or several Groups of POL converters when pulled low or
Act as a Group Reprogramming Trigger.
Hardware-based control of groups of POL converters and Auxiliary Devices
www.power-one.com
ZM7300G Series Digital Power Manager
2
C bus by the margining command. All POL converters
2
C bus by specific commands.
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Data Sheet
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C