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MAX17014 Evaluation Kit
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
? +10.8V to +13.2V, 3A DC power supply
? Digital multimeters (DMMs)
Procedure
The MAX17014 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Connect the positive terminal of the DC power sup-
ply to the VIN pad. Connect the negative terminal of
the DC power supply to the PGND pad.
2) Preset the power supply to +12V and disable the
Although the IC specifies a +8V to +16.5V input range,
the EV kit is optimized for +10.8V to +13.2V input supply.
Jumper Selection
Several jumper settings in the following tables illustrate
features of the MAX17014 EV kit.
Switching Frequency Selection (FSEL)
The step-down and step-up regulators on the MAX17014
EV kit switch at the same frequency, but are 180° out-of-
phase with each other. The EV kit features a 2-pin jumper
(JU1) to select the operating frequency. The EV kit is
optimized for 1.2MHz switching frequency; proper oper-
ation at 600kHz may require component changes. Table
2 lists the selectable JU1 jumper options.
Table 2. Jumper JU1 Functions
output.
3) Verify that the jumpers follow the default settings in
Table1.
4) Turn on the power supply.
5) Verify that the step-down regulator output (OUT) is
SHUNT POSITION
Not installed*
Installed
FSEL PIN
CONNECTED TO
VL (through pullup
resistor R21)
GND
EV KIT
FREQUENCY
1.2MHz
600kHz
+3.3V.
6) Verify that the step-up regulator output (AVDD) is
+16V.
7) Verify that the gate-on supply (VGON) is +35V.
8) Verify that the gate-off supply (VGOFF) is -6V.
9) Verify that the op-amp outputs (VCOM1, VCOM2)
are +8V.
Table 1. Default Jumper Settings
*Default position.
High-Voltage Switch Mode (MODE)
The MAX17014 EV kit features an option to select the
operating mode (delay or no delay) for the high-voltage
switches. On the rising edge of the CTL pin, GON con-
nects to SRC. On CTL’s falling edge, GON may con-
nect immediately to DRN (no delay), or GON may con-
nect to DRN after a delay set by capacitor C9. Refer to
the High-Voltage Switch Control section in the
JUMPER
JU1
JU2
JU3
JU4
SHUNT POSITION
Not installed
2-3
Installed
Installed
MAX17014 IC data sheet for a more detailed descrip-
tion of the two modes of operation. Jumper JU2 selects
the high-voltage switch mode for the MAX17014. Table
3 lists the selectable JU2 jumper options.
Table 3. Jumper JU2 Functions
JU5
JU6
Installed
1-2
SHUNT POSITION
1-2
MODE PIN
CONNECTED TO
C9
HIGH-VOLTAGE
SWITCH MODE
Delay set by C9
Detailed Description
The MAX17014 EV kit evaluates the MAX17014 multiple-
output power-supply IC, which is designed primarily for
2-3*
Not installed
*Default position.
VL
Unconnected
No delay
Not allowed
TFT LCD panels used in monitors and TVs. The EV kit
contains a step-down switching regulator to generate
the logic supply rail, a step-up switching regulator to
generate the source driver supply, and two charge-
pump regulators to generate the gate driver supplies.
The EV kit also includes two high-performance op amps
designed to drive the LCD back plane (VCOM).
Step-Down and Negative Charge-Pump
Regulator Enable Input (EN1)
The MAX17014 EV kit features a jumper (JU3) to con-
trol the step-down and negative charge-pump regulator
enable input (EN1). By default, a shunt is installed
across JU3 to provide EN1 logic-high. When EN1 is
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