MAX17075EVKIT+ Maxim Integrated Products, MAX17075EVKIT+ Datasheet - Page 4

• Manufacturer Part Number: MAX17075EVKIT+
• Description: Power Management Modules & Development Tools MAX17075 EVAL KIT MAX17075 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX17075EVKIT+

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

MAX17075 Evaluation Kit
Jumper JU2 configures the positions of the high-
voltage switch control pin (CTL) of the MAX17075 IC.
The CTL pin can be controlled by an external logic con-
troller connected to the EV kit’s CTL pad. Remove the
shunt from jumper JU2 before connecting an
external controller to the CTL pad. See Table 2 for JU2
shunt positions.
The MAX17075 EV kit features a capacitive dummy
load of 1500pF (C18) at the VGON output pad to simu-
late a TFT panel load to test the switch array. When
testing with an actual LCD panel, disconnect the
dummy load. Jumper JU3 connects and disconnects
the dummy load. Table 3 lists the selectable JU3
jumper options.
The MAX17075 EV kit’s step-up switching-regulator out-
put (AVDD) is set to +13V by feedback resistors R8 and
R9. To generate output voltages other than +13V (up to
+18V), select different voltage-divider resistors.
Operation at significantly higher output voltages could
reduce the available output current, and require
changes in component values or voltage rating for
capacitors C3 and C4. Refer to the Design Procedure,
Table 2. JU2 Jumper Selection (CTL)
* Default position.
Table 3. JU3 Jumper Selection (C18)
* Default position.
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SHUNT POSITION
SHUNT POSITION
Step-Up Switching Regulator Output Voltage
Not installed*
Not installed*
High-Voltage Switch Output (VGON)
Installed
Installed
None
High-Voltage Switch Control (CTL)
Output-Voltage Selection
CTL PIN CONNECTED TO
GND through resistor R5
External logic controller
Not connected to C18
through the CTL pad
Connected to C18
Dummy Load
VGON
VIN
(AVDD)
COM pin connected to SRC pin
COM pin disconnected from DRN pin
COM pin connected to DRN pin
COM pin disconnected from SRC pin
CTL driven by external logic controller
CTL high: COM pin connected to SRC pin
CTL low: COM pin connected to DRN pin
Dummy load testing
Normal operation, no load
Step-Up Regulator, Output-Voltage Selection section in
the MAX17075 IC data sheet for instructions on select-
ing resistors R8 and R9.
The positive charge-pump output (SRC) is set to +30V
by voltage-divider resistors R15 and R16. To set SRC to
other voltages (up to approximately 3xAVDD, limited to
+36V), select different voltage-divider resistors. Refer to
the Design Procedure, Charge-Pump Regulators,
Output-Voltage Selection section in the MAX17075 IC
data sheet for instructions on selecting resistors R15
and R16.
The negative charge-pump output (VGOFF) is set to
-7V by voltage-divider resistors R6 and R7. To set
VGOFF to other voltages (from 0 to -AVDD approxi-
mately), select different voltage-divider resistors. Refer
to the Design Procedure, Charge-Pump Regulators,
Output-Voltage Selection section in the MAX17075 IC
data sheet for instructions on selecting resistors R6 and
R7.
The op-amp output (OUT) is set to +6.5V by voltage-
divider resistors R3 and R4. To set the outputs to other
voltages (from 0 to AVDD), select different voltage-
divider resistors.
HIGH-VOLTAGE SWITCH CONFIGURATION
Negative Charge-Pump Output (VGOFF)
Positive Charge-Pump Output (SRC)
OPERATION
Op-Amp Output (OUT)