Datasheet

Evaluates: MAX17108
Inputs (A_) Logic-Level
Selection (JU12–JU21)
Jumpers JU12–JU21 configure the MAX17108 EV kit’s
A1–A10 inputs to accept either a DC voltage or square-
wave input signal. Install a shunt across pins 1-2 of the
individual channels to use the square-wave signal
applied at the SIGNAL_IN and GND PCB pads to drive
the inputs. The square-wave signal should have a +2V
to +5.5V logic-high level. Place scope probes across
the shunts installed at jumpers JU2–JU11 and
PGND for proper evaluation of the MAX17108 scan
driver outputs (Y1–Y10), when applying a square-
wave signal at the SIGNAL_IN PCB pad.
Install a shunt across pins 2-3 of the individual chan-
nels to configure the inputs to static logic-low or logic-
high DC levels. DIP switch SW1 sets the buffer inputs to
a logic-high level using the output of LDO regulator
(U2) and potentiometer R56. The LDO regulator output
voltage can be adjusted from +2.2V to +5.3V using R56
and can be monitored by probing test point LDO_OUT.
Rotate potentiometer R56 clockwise to decrease the
LDO output voltage and vice versa. Set DIP switch SW1
to the on position to place a logic-high voltage at the
inputs. Set switch SW1 to the off position to place a
logic-low voltage at the inputs. See Table 3 for proper
JU12–JU21 jumper configurations.
MAX17108 Evaluation Kit
4 _______________________________________________________________________________________
SHUNT
POSITION
MAX17108 Y1–Y10
OUTPUTS
EV KIT FUNCTION
Installed Connected to RC loads
Outputs monitored at
shunts
Not
installed
Disconnected from RC
load
No-load condition for
scan drivers
Table 2. Output Load Connection
(JU2–JU11)
SHUNT
POSITION
SW1 POSITION A_ INPUT LOGIC LEVEL
1-2 X
Square wave applied at
SIGNAL_IN PCB pad
Off Low
2-3
On High
Table 3. Logic Input Configuration
(JU12–JU21)
X = Don’t care.