User Guide 097
UG097.0
October 10, 2016
Submit Document Feedback
4
Functional Description
The ISL68137-61P-EV1Z provides a convenient method to
evaluate the performance of Intersil’s family of digital
multiphase devices and the onboard transient load provides a
realistic way to exercise the regulators outstanding transient
performance. IC details are described in the
ISL68137
datasheet.
The ISL68137-61P-EV1Z evaluation board is shown in
Figures 8
and
9
. The hardware enables are controlled by toggle switches
(SWE1 and SWE2). J4 is provided to interface directly with the
Intersil USB to PMBus dongle provided with the evaluation board.
J104 provides an interface to the Intersil USB to AVSBus dongle.
Input voltage is supplied via the ATX connectors or via bench
supplies using the input connectors provided (J113, J114, 5V).
High current output test lugs allow external loading.
Test points are provided to make efficiency data collection easy.
VINMEAS, OUT0MEAS, and OUT1MEAS provide convenient points
to acquire input and output voltage measurements (
Figure 3
).
Figures 11
through
15
show performance data typical of the
digital multiphase devices.
Operating Range
This evaluation board is configured to support up to 270A on the
six phase output and up to 30A on the single phase output. Input
voltage range is from 5V to 16V.
Transient Load
The transient load on this board is attached to VOUT1 and is
capable of >100A and >200A/µs for output voltage down to 1V.
It is enabled by installing a jumper on the LH_BIAS header.
Transient load current may be monitored from the I1MON header
at 10mV/A. Note that while the generator is capable of very high
currents, managing the total thermal load is critical. For this
reason, it is advised that the duty cycle of the load is kept <5% or
the temperature on the load generation components is
monitored. Use of a fan will extend the capability of the load.
Transient load waveforms may be controlled using an internal
oscillator or an external oscillator on J17. When using the internal
oscillator, RVAR1 is used to adjust slew rate and RVAR2 is used
to adjust amplitude of the transient load current.
OUT1MON provides a measurement point for Output 1 during
transient load operation. Note that due to proximity to the power
inductor, some oscilloscope probes may pick up a stray magnetic
field. Care must be taken to ensure accurate measurement of
the true output voltage (
Figure 4
).
FIGURE 3. TEST POINTS
FIGURE 4. MEASUREMENT POINTS
Downloaded from
Downloaded from
Downloaded from
Downloaded from
