ZM7304G-65503Y-Q1 POWER-ONE [Power-One], ZM7304G-65503Y-Q1 Datasheet - Page 24

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

The interrupt inputs should be controlled with open collector devices. The propagation delay between the external
device pulling the interrupt input low and the DPM pulling down OK lines and triggering the turn-off process is
approximately 10µs.
10.5.4.2
An interrupt that is programmed as a group reprogramming trigger always acts only on one group of POL
converters. Interrupt 0 acts on Group A, Interrupt 1 acts on Group B and so on. The assignment is fixed and
cannot be changed by the user.
When the interrupt is pulled low, the DPM will program the group of POL converters. Upon completion of the
programming, the DPM will turn-on the POL converters, if the Auto Turn-On is enabled. When the interrupt input
is released, the DPM will pull the appropriate OK line low. The POL converters in the group will execute regular
turn-off ramping their output voltages down according to the turn-off delay and falling slew rate settings. In
addition, the DPM will clear all bits in the POL Programming Status registers.
The group reprogramming trigger is mostly used to support hot swap of boards and daughter cards that do not
have a DPM installed on them as shown in Figure 19.
REV. 3.3 NOV 26, 2007
Group Reprogramming Trigger
•
Delayed turn-on at power-up (Automatic Turn-On is enabled but the interrupts are held low during
power-up. Note that POL converters can be programmed even when an interrupt is held low.)
Figure 18. Interrupt Configuration Window
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ZM7300G Series Digital Power Manager
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Data Sheet