Datasheet

Evaluates: MAX17119
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MAX17119 Evaluation Kit
Quick Start
Required Equipment
• +12V to +38V, 1A DC power supply
• -12V to -2V, 1A DC power supply
• Two voltmeters
Procedure
The MAX17119 EV kit is fully assembled and test-
ed. Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed. When ready, turn on
V
GOFF
before turning on V
GON1
and V
GON2
.
1) Verify that shunts are installed across jumpers JU1–
JU10 (RC loads connected at scan-driver outputs).
2) Verify that a shunt is installed across pins 1-2 of
jumper JU11 (GON2 = GON1).
3) Verify that shunts are installed across pins 2-3 of
jumpers JU12–JU20 (DC voltage applied at A_
inputs).
4) Verify that shunts are installed across pins 1-2 of
jumper JU21 (VSENSE derived from LDO_OUT).
5) Verify that shunts are installed across pins 2-3
of jumpers JU22, JU23, and JU24 (DC voltage
applied at FLK_ inputs).
6) Verify that all positions of DIP switches SW1 and
SW2 are in the on position (logic-high DC voltage
at inputs).
7) Connect a voltmeter to the LDO_OUT and GND test
points.
8) Connect the +12V to +38V power-supply positive
terminal to the GON1 PCB pad. Connect the power-
supply ground terminal to the PGND pad.
9) Connect the negative terminal of the negative
power supply to the GOFF PCB pad. Connect the
ground terminal of the negative power supply to the
PGND pad.
10) Enable the negative power supply and set it to
-12V.
11) Enable the GON1 positive power supply and set it
to +20V.
12) Adjust potentiometer R60 until the voltmeter at
LDO_OUT reads +3.3V.
13) Verify that test points TP1–TP9 outputs are +20V.
14) Verify that test point TP10 output is -12V.
Detailed Description of Hardware
The MAX17119 EV kit is a fully assembled and test-
ed surface-mount PCB that evaluates the MAX17119
10-channel, high-voltage, level-shifting scan drivers
for thin-film transistor (TFT) liquid-crystal display (LCD)
applications. The EV kit requires two positive power sup-
plies and one negative power supply. GON1 and GON2
require +12V to +38V power supplies that provide up to
1A of current. GOFF requires a -12V to -2V power supply
that provides up to 1A of current.
The IC’s logic level to high-voltage, level-shifting scan
drivers can buffer nine logic inputs (A1–A9) and shift
them to a desired level (Y1–Y9) for driving TFT-LCD row
logic. GON1 supplies the high-voltage levels at the IC
buffers Y1–Y7 and YDCHG when its respective input is a
logic-high. GON2 supplies the high-voltage levels at the
IC buffers Y8 and Y9 when its respective input is a logic-
high. GOFF supplies the low-voltage level at all of the
scan-driver outputs when their input is a logic-low. DIP
switch SW1 is used to set a DC logic-high level at A1–A9
inputs for testing purposes, by using a high-voltage input
LDO regulator, U2 (MAX6771), and potentiometer R56.
Jumper JU11 is provided for evaluation of the EV kit when
utilizing one power source for the IC’s GON1 and GON2
power inputs. See the Power-Supply Configurations sec-
tion for proper configuration of jumper JU11. Jumpers
JU1–JU10 are provided to connect RC loads at the IC’s
Y1–Y9 and YDCHG outputs.
Table 1. Default Jumper Positions
JUMPER SHUNT POSITION
JU1–JU10 Installed
JU11 1-2
JU12–JU20, JU22, JU23, JU24 2-3
JU21 1-2