UG067 Rev.2.00
Page 3 of 22
Aug 23, 2017
ISL68200DEMO1Z
Configuration
The default programming pins setting of the ISL68200DEMO1Z
board can be found at the resistor reader table on the upper right
corner of
“ISL68200DEMO1Z Schematics” on page 7
or read
back using the PowerNavigator software. Each PMBus command
can be loaded or programmed through the PowerNavigator
software. Note that ISL68200 does not have NVM to store the
operational configuration, which can however be set by the
resistor programming pins (PROG1-4) or programmed by the
serial bus master before powering up. If a serial bus master is
available in the system, the ISL68200-based rail can be fully
controlled using the software for the power-up/down sequencing
and operational configuration without a soldering iron.
Load Transient
The on-board transient load can be controlled by a function
generator, whose inputs are connected to FG_DRIVE2 and
FG_GND2. The function generator’s output is terminated by R42
at the input terminal, while its amplitude and dV/dt set the load
amplitude and di/dt on the 50m
Ω
load (R
LT1
//R
LT2
). The
transient load can be monitored with a scope probe on TP15.
Note that the duty cycle of applied load should be less than 10%
duty cycle with <10ms pulse width to keep the average power of
R
LT1
/R
LT2
less than its power rating.
.
FIGURE 4. LOAD TRANSIENT
2SHQ-XPSHUIRU(IILFLHQF\0HDXUHPHQW
2Q%RDUG/RDG7UDQVLHQW
28
7
%
287$
287$
287%
9&&B/'*(1
9287
39&&
48
%6&1/6
&
X
5
5/7
5
'13
&
X
5
5
5
N
73
75$1B/2$'
8
(/,6=
,1%
,1$
96
287$
,1$
96
,1%
287%
)*B'5,9(
5
& S
5
5
& 3
5/7
)*B*1'
5
.
-3
OPEN JP4 FOR
EFFICIENCY MEASUREMENT
FIGURE 5. ISL68200 DEMONSTRATION BOARD SETUP
