ZL6100EVAL1Z Intersil, ZL6100EVAL1Z Datasheet - Page 29

• Manufacturer Part Number: ZL6100EVAL1Z
• Description: EVAL BOARD USB ZL6100
• Manufacturer: Intersil

Specifications of ZL6100EVAL1Z

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

to “Switching Frequency and PLL” on page 15” for more
details on the operating parameters of the SYNC pin.
Multiple device sequencing may also be achieved by issuing
PMBus commands to assign the preceding device in the
sequencing chain as well as the device that will follow in the
sequencing chain. This method places fewer restrictions on
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.
Refer to Application Note AN2033 for details on sequencing
via the I
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.
Temperature Monitoring Using the XTEMP Pin
The ZL6100 supports measurement of an external device
temperature using either a thermal diode integrated in a
processor, FPGA or ASIC, or using a discrete
diode-connected 2N3904 NPN transistor. Figure 20
illustrates the typical connections required.
FIGURE 20. EXTERNAL TEMPERATURE MONITORING
2
C/SMBus interface.
ZL6100
EMBEDDED THERMAL DIODE
ZL6100
DISCRETE NPN
XTEMP
SGND
XTEMP
SGND
29
100pF
100pF
FPGA
ASIC
DSP
µP
2N3904
ZL6100
Active Current Sharing
Paralleling multiple ZL6100 devices can be used to increase
the output current capability of a single power rail. By
connecting the DDC pins of each device together and
configuring the devices as a current sharing rail, the units will
share the current equally within a few percent.
Figure 21 illustrates a typical connection for three devices.
The ZL6100 uses a low-bandwidth digital current sharing
technique to balance the unequal device output loading by
aligning the load lines of member devices to a reference device.
3.3V - 5V
FIGURE 21. CURRENT SHARING GROUP
DDC
DDC
DDC
ZL6100
ZL6100
ZL6100
C
C
C
IN
IN
IN
C
C
C
December 15, 2010
OUT
OUT
OUT
V
IN
V
FN6876.2
OUT