MAX17108 [MAXIM]
6V to 20V AVDD Input Voltage Range;
| 型号： | MAX17108 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 6V to 20V AVDD Input Voltage Range |
| 文件： | 总8页 (文件大小：313K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4354; Rev 0; 10/08
MAX17108 Evaluation Kit
Evluates:MAX7108
General Description
Features
The MAX17108 evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount PCB that evaluates the
MAX17108 10-channel, high-voltage level-shifting scan
driver for active-matrix, thin-film transistor (TFT) liquid-
crystal display (LCD) applications.
o +6V to +20V AVDD Input Voltage Range
o +12V to +38V GON_ Input Voltage Range
o -14V to -4V GOFF Input Voltage Range
o Resistor-Adjustable LDO Regulator for Logic
The EV kit operates from a DC supply voltage of +6V to
+20V for the MAX17108 AVDD input. The EV kit also
requires a +12V to +38V power supply and a -14V to
-4V negative power supply for the MAX17108 level-
shifting scan-driver circuitry. A PCB pad is provided to
monitor the output of an independent op amp, which is
configured to half the AVDD input voltage and is capa-
ble of providing up to 200mA of short-circuit current.
Inputs
o Demonstrates 10 High-Voltage Level-Shifting
Scan Drivers
o Lead-Free and RoHS Compliant
o Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX17108EVKIT+
EV Kit
+Denotes lead-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
C1, C88,
0
Not installed, ceramic capacitors
(1206)
C38–C43, C62,
C64, C65, C66,
C68, C70, C72,
C73, C74, C76
100pF 5ꢀ, 50V C0G ceramic
16 capacitors (0402)
C89, C90
Murata GRM1555C1H101J
1µF 10ꢀ, 25V X5R ceramic
capacitor (0603)
Murata GRM188R61E104K
C2
1
0
3
10pF 5ꢀ, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H100J
C44–C49,
C67, C75
8
6
6
4
4
4
Not installed, ceramic capacitors
(0603)
C3, C4
51pF 5ꢀ, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H510J
1µF 10ꢀ, 50V X7R ceramic
capacitors (0805)
Murata GRM21BR71H105K
C50–C55
C56–C61
C5, C6, C7
4pF 0.25pF, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H4R0C
1000pF 5ꢀ, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H102J
C8–C13
C14–C25
C26–C31
C32–C37
6
12
6
12pF 5ꢀ, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H120J
1800pF 5ꢀ, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H182J
C63, C69,
C71, C77
1.5pF 0.25pF, 50V C0G ceramic
capacitors (0402)
Murata GRM155C1H1R5C
680pF 5ꢀ, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H681J
C78, C79,
C84, C85
3pF 0.25pF, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H3R0C
220pF 5ꢀ, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H221J
C80–C83
6
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX17108 Evaluation Kit
Component List (continued)
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
R6, R11, R16,
R21, R26, R31
0.1µF 10ꢀ, 25V X5R ceramic
capacitor (0603)
Murata GRM188R61E104K
6
6
124Ω 1ꢀ resistors (0603)
C86
1
R7, R12, R17,
R22, R27, R32
249Ω 1ꢀ resistors (0603)
10µF 20ꢀ, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J106M
R33–R38
R39–R44
R45–R54
R55
6
6
178Ω 1ꢀ resistors (0603)
10Ω 5ꢀ resistors (0603)
C87
1
1
10 100kΩ 5ꢀ resistors (0603)
GND
Miniature black test point
1
1
1
1
100kΩ 1ꢀ resistor (0603)
100kΩ single-turn potentiometer
30.1kΩ 1ꢀ resistor (0603)
10-position DIP switch
JU1,
JU12–JU21
11 3-pin headers
R56
R57
JU2–JU11
10 2-pin headers
Sꢁ1
LDO_OUT,
TP1–TP10
11 Miniature red test points
10-channel scan driver with op amp
(28 TQFN-EP*)
Maxim MAX17108ETI+
U1
U2
1
R1, R2
2
6
100kΩ 1ꢀ resistors (0402)
R3, R8, R13,
R18, R23, R28
Adjustable LDO regulator
(8 TDFN-EP*)
Maxim MAX6771TALD2+
(Top Mark +BEG)
64.9Ω 1ꢀ, 1/2ꢁ resistors (2010)
Evluates:MAX7108
1
R4, R9, R14,
R19, R24, R29
6
6
64.9Ω 1ꢀ, 1/4ꢁ resistors (1206)
64.9Ω 1ꢀ resistors (0603)
—
—
21 Shunts (JU1–JU21)
R5, R10, R15,
R20, R25, R30
1
PCB: MAX17108 Evaluation Kit+
*EP = Exposed pad.
Component Supplier
SUPPLIER
Murata Mfg. Co., Ltd.
Note: Indicate that you are using the MAX17108 when contacting this component supplier.
PHONE
WEBSITE
770-36-1300
www.murata.com
2) Verify that shunts are installed across jumpers
JU2–JU11 (RC loads connected at scan driver out-
puts).
Quick Start
Required Equipment
Before beginning, the following equipment is needed:
3) Verify that shunts are installed across pins 2-3 of
jumpers JU12–JU21 (DC voltage applied at
inputs).
• -12V to -4V, 500mA DC power supply
• +6V to +20V, 250mA DC power supply
• +12V to +38V, 1A DC power supply
• Two voltmeters
4) Verify that all positions of the Sꢁ1 DIP switch are
in the on position (logic-high DC voltage at inputs).
5) Connect a voltmeter to the LDO_OUT and GND
test points.
Procedure
The MAX17108 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supplies until all
connections are completed.
6) Connect a voltmeter to the VCOM and GND PCB
pads.
7) 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.
1) Verify that a shunt is installed across pins 1-2 of
jumper JU1 (GON2 = GON1).
2
_______________________________________________________________________________________
MAX17108 Evaluation Kit
Evluates:MAX7108
8) Connect the +6V to +20V power-supply positive
terminal to the AVDD PCB pad. Connect the
power-supply ground terminal to the PGND pad.
configuration of jumper JU1. Jumpers JU2–JU11 are provid-
ed to connect RC loads at the MAX17108Y 1–Y10 outputs.
The MAX17108 VCOM amplifier output is configured as
a unity-gain buffer and is set to half the voltage applied
at the AVDD PCB pad, using resistors R1 and R2. To
reconfigure VCOM to other voltages, replace resistor
R1. The VCOM output can be monitored using the EV
kit VCOM and GND PCB pads.
9) Connect the +12V to +38V power-supply positive
terminal to the GON1 PCB pad. Connect the
power-supply ground terminal to the PGND pad.
10) Enable the GOFF negative power supply and set it
to -12V.
11) Enable the AVDD positive power supply and set it
to +12V.
Power Supplies Configuration
The MAX17108EV kit requires two positive power supplies
and one negative power supply for proper evaluation of
the EV kit. AVDD requires a +6V to +20V power supply
that provides up to 250mA of current. GON1 and GON2
each require a +12V to +38V power supply providing up
to 500mA of current. GOFF requires a -12V to -4V power
supply that provides up to 500mA of current.
12) Enable the GON1 positive power supply and set it
to +20V.
13) Adjust potentiometer R56 until the voltmeter at
LDO_OUT reads +3.3V.
14) Verify that the output of the high-speed op amp
(VCOM) is +6V.
Jumper JU1 configures the input power source for
GON2. Install a shunt across pins 1-2 of jumper JU1 to
select GON1 as the input power source for GON2.
Install a shunt across pins 2-3 of jumper JU1 to apply
an external power source at the GON2 and PGND PCB
pads. Buffers Y7 and Y8 output the voltage applied at
the GON2 PCB pad. See Table 1 for proper jumper JU1
configuration.
15) Verify that test points TP1–TP10 outputs are +20V.
Detailed Description of Hardware
The MAX17108 evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount PCB that evaluates the
MAX17108 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 supplies and one negative power supply. AVDD
requires a +6V to +20V power supply that provides up
to 250mA of current. A +12V to +38V power supply that
provides up to 1A of current is required when powering
both the GON1 and GON2 inputs. The GON1 and
GON2 inputs can also be powered using separate
power supplies that provide up to 500mA each of cur-
rent. GOFF requires a -12V to -4V power supply that
provides up to 500mA of current.
Table 1. GON2 Power Source Selection
(JU1)
SHUNT
GON2 IC PIN
POSITION
1-2
Connected to GON1
Connected to external power source at GON2
and PGND PCB pads
2-3
The MAX17108 logic level to high-voltage level-shifting
scan drivers can buffer 10 logic inputs (A1–A10) and
shift them to a desired level (Y1–Y10) for driving TFT-
LCD row logic. GON1 supplies the high-voltage levels
at the MAX17108 buffers Y1–Y6, Y9, and Y10 when its
respective input is a logic-high. GON2 supplies the
high-voltage levels at the MAX17108 buffers Y7 and Y8
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 Sꢁ1 is used
to set a DC logic-high level at A1–A10 inputs for testing
purposes, by using a high-voltage input LDO regulator
U2 (MAX6771) and potentiometer R56.
Additional surface-mount 1206 PCB pads are provided
for adding additional bulk capacitance at C1, C88, C89,
and C90 when interfacing long wires to the EV kit’s
AVDD, GON1, GON2, and GOFF power-supply inputs.
Output Load Connection
The MAX17108 EV kit provides resistor/capacitor loads
for each output channel to mimic TFT-LCD panel load
models for easy evaluation of the EV kit. Install shunts
across jumpers JU2–JU11 to connect the RC loads to
the MAX17108 scan-driver outputs. Place a scope
probe across the shunts installed at jumpers
JU2–JU11 and PGND for proper evaluation of the
MAX17108 buffers (Y1–Y10), when applying a square-
wave signal at the SIGNAL_IN PCB pad. Test points
TP1–TP10 can be used to monitor the loaded buffer out-
puts when applying static DC voltages at the A_ inputs.
Jumper JU1 is provided for evaluation of the MAX17108
EV kit when utilizing one power source for the
MAX17108 GON1 and GON2 power inputs. See the
Power Supplies Configuration section for proper
_______________________________________________________________________________________
3
MAX17108 Evaluation Kit
Table 2. Output Load Connection
(JU2–JU11)
Table 3. Logic Input Configuration
(JU12–JU21)
SHUNT
POSITION
SHUNT
POSITION
MAX17108 Y1–Y10
SW1 POSITION
A_ INPUT LOGIC LEVEL
EV KIT FUNCTION
OUTPUTS
Square wave applied at
SIGNAL_IN PCB pad
Outputs monitored at
shunts
1-2
X
Installed
Connected to RC loads
Off
On
Low
Not
installed
Disconnected from RC No-load condition for
2-3
load
scan drivers
High
X = Don’t care.
Inputs (A_) Logic-Level
Selection (JU12–JU21)
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 Sꢁ1 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 Sꢁ1
to the on position to place a logic-high voltage at the
inputs. Set switch Sꢁ1 to the off position to place a
logic-low voltage at the inputs. See Table 3 for proper
JU12–JU21 jumper configurations.
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.
Evluates:MAX7108
4
_______________________________________________________________________________________
MAX17108 Evaluation Kit
Evluates:MAX7108
Figure 1. MAX17108 EV Kit Schematic
_______________________________________________________________________________________
5
MAX17108 Evaluation Kit
Evluates:MAX7108
Figure 2. MAX17108 EV Kit Component Placement Guide—Component Side
6
_______________________________________________________________________________________
MAX17108 Evaluation Kit
Evluates:MAX7108
Figure 3. MAX17108 EV Kit PCB Layout—Component Side
_______________________________________________________________________________________
7
MAX17108 Evaluation Kit
Evluates:MAX7108
Figure 4. MAX17108 EV Kit PCB Layout—Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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