Datasheet

MAX17120 Evaluation Kit
Evaluates: MAX17120
2 ______________________________________________________________________________________
Quick Start
Required Equipment
• +3.3V, 100mA DC power supply (VDD)
• +35V, 100mA DC power supply (VON)
• -25V, 100mA DC power supply (VOFF)
• Voltmeter
Procedure
The MAX17120 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.
1) Connect the +3.3V DC power supply to the VDD and
AGND PCB pads.
2) Connect the +35V DC power supply to the VON and
AGND PCB pads.
3) Connect the -25V DC power supply to the VOFF and
AGND PCB pads.
4) Turn on the power supply.
5) Note that the logic inputs (STV, CPV1, CPV2, and
CPV3) must be set to AGND or VDD.
6) Verify the STVP logic at the respective test points:
7) Verify the CKV_ and CKVB_ logic at the respective
test points:
Note: H = VDD, L = GND, ↑ = rising edge, CS = charge-share
state, and X = don’t care.
Detailed Description of Hardware
The MAX17120 EV kit contains all the components nec-
essary to evaluate the MAX17120 IC. The MAX17120 is a
triple, high-voltage, level-shifting scan driver to drive TFT
panel gate logic. The drivers’ outputs swing from -30V
to +40V and three sets of complementary outputs are
provided to allow charge sharing during state changes.
The EV kit operates from a DC supply range from +2.2V
to +3.6V and consumes 500FA (typ).
The MAX17120 EV kit provides PCB pads to connect the
logic inputs and scan-driver outputs. Test points are also
provided to monitor the charge sharing, EN, and DISH
states. Jumper JU1 is provided to enable/disable the
MAX17120 device (see Table 1).
Table 1. Jumper JU1 Function
SHUNT
POSITION
EN PIN DESCRIPTION
Installed Connected to VDD MAX17120 enabled
Not installed
Connected to
ground
MAX17120 disabled
SIGNAL LOGIC STATE
EN H H H L
STV L H H X
CPV1 X L H X
STVP VOFF VON Hi-Z VOFF
SIGNAL LOGIC STATE
EN H H H H L
STV L L H H X
CPV_ L
↑
L H X
CKV_ Hi-Z (CS) Toggle VOFF VON VOFF
CKVB_ Hi-Z (CS) Toggle VON VOFF VOFF
Note: H = VDD, L = GND, Hi-Z = high impedance, and
X = don’t care.