zl2106 Intersil Corporation, zl2106 Datasheet - Page 30

• Manufacturer Part Number: zl2106
• Description: 6a Digital-dc Synchronous Step-down Dc-dc Converter
• Manufacturer: Intersil Corporation

device in the sequencing chain as well as the device
that will follow in the sequencing chain. This method
places fewer restrictions on the SMBus address (no
need of sequential address) and also allows the user to
assign any phase offset to any device irrespective of its
SMBus device address.
The Enable pins of all devices in a sequencing group
must be tied together and driven high to initiate a
sequenced turn-on of the group. Enable must be driven
low to initiate a sequenced turnoff of the group. Please
refer to Application Note AN33 for details on
sequencing via the I
7.13 Fault Spreading
Digital-DC devices can be configured to broadcast a
fault event over the DDC bus to the other devices in
the group. When a non-destructive fault occurs and the
device is configured to shut down on a fault, the device
will shut down and broadcast the fault event over the
DDC bus. The other devices on the DDC bus will shut
down together if configured to do so, and will attempt
to re-start in their prescribed order if configured to do
so.
7.14 Monitoring via I
A system controller can monitor a wide variety of
different ZL2106 system parameters through the
I
conditions by monitoring the SALRT pin, which will
be pulled low when any number of pre-configured fault
conditions occur.
The device can also be monitored continuously for any
number of power conversion parameters including
input voltage, output voltage, output current, internal
junction temperature, switching frequency and duty
cycle.
2
C/SMBus interface. The device can monitor for fault
2
30
C/SMBus interface.
2
C/SMBus
ZL2106
The PMBus host should respond to SALRT as follows:
If multiple devices are faulting, SALRT will still be
low after doing the above steps and will require
transmission with the Alert Response Address
repeatedly until all faults are cleared. Please refer to
Application Note AN33 for details on how to monitor
specific parameters via the I
7.15 Snapshot™ Parametric Capture
The ZL2106 offers a special feature that enables the
user to capture parametric data during normal
operation or following a fault. The Snapshot
functionality is enabled by setting bit 1 of
MISC_CONFIG to 1.
The Snapshot feature enables the user to read the
parameters listed in Table 21 via a block read transfer
through the SMBus. This can be done during normal
operation, although it should be noted that reading the
22 bytes will occupy the SMBus for some time.
1. ZL device pulls SALRT low.
2. PMBus host detects that SALRT is now low,
3. PMBus host talks to the ZL device that has
performs transmission with Alert Response
Address to find which ZL device is pulling
SALRT low.
pulled SALRT low. The actions that the host
performs are up to the system designer.
Data Sheet Revision 2/19/2009
2
C/SMBus interface.
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