MAX17088EVKIT [MAXIM]
35V to -25V High-Voltage Level-Shifting Drivers;
| 型号： | MAX17088EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 35V to -25V High-Voltage Level-Shifting Drivers |
| 文件： | 总12页 (文件大小：252K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4ꢀꢀ0; Rev 0; 4/09
MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
General Description
Features
o +1.8V to +6V Input Range
o Output Voltages
The MAX17088 evaluation system (EV system) consists of
the MAX17088 evaluation kit (EV kit) and the Maxim
CMAXQUSB command module. Windows® 2000/XP®- and
Windows Vista®-compatible software is also available for
use with the EV system (MAX17088EVCMAXQU+) and can
be downloaded from www.maxim-ic.com/evkitsoftware.
+8V Output at 300mA (+2.2V Input Step-Up
Switching Regulator)
+21V Output at 20mA (Positive Charge Pump)
-13V Output at 20mA (Negative Charge Pump)
1ꢀ0mA ꢁigh-Current Op-Amp Output
The MAX17088 EV kit (MAX17088EVKIT+) is a fully
assembled and tested surface-mount PCB that pro-
vides the features required for active-matrix, thin-film
transistor (TFT) liquid-crystal displays (LCDs). The EV
kit contains a step-up switching regulator, positive two-
stage charge pump, negative two-stage charge pump,
digitally adjustable VCOM calibration device with non-
volatile memory, SMBus™-compatible interface, high-
speed operational amplifier (op amp), and high-volt-
age, level-shifting scan driver for TFT-LCD applications.
o Resistor-Adjustable Switching Regulator and
Op-Amp Output Range
o Digitally Programmable Op-Amp Output Voltage
o +3ꢀV to -2ꢀV ꢁigh-Voltage Level-Shifting Drivers
o > 8ꢀ% Efficiency (Step-Up Switching Regulator)
o 1.2Mꢁz Step-Up Switching Frequency
o SMBus-Compatible Interface
o Windows 2000/XP- and Windows Vista
The MAX17088 EV kit operates from a DC supply volt-
age from +1.8V to +6V. The step-up switching regulator
is configured for a +8V output providing at least 300mA
from a +2.2V input. The positive charge pump is config-
ured for a +21V output providing at least 20mA. The
negative charge pump is configured for a -13V output
providing at least 20mA. The op amp is capable of pro-
viding up to 1ꢀ0mA peak and features a programma-
ble output voltage initially configured for +3.2V. The
high-voltage level-shifting scan driver buffers inputs
from STV, CPV, and OE pads and shifts them to a
desired level to drive TFT-LCD row logic.
(32-Bit)-Compatible Software
o 1.ꢀmm Low-Profile Surface-Mount Components
o Lead(Pb)-Free and RoꢁS Compliant
o Fully Assembled and Tested
Ordering Information
PART
TYPE
EV Kit
MAX17088EVKIT+
MAX17088EVCMAXQU+
EV System
The MAX17088 EV kit demonstrates low quiescent cur-
rent and high efficiency (> 8ꢀ%) for maximum battery
time per charge. Operation at 1.2MHz allows the use of
tiny surface-mount components. The MAX17088 36-pin
thin QFN package (0.8mm max height), with low-profile
external components, allow this circuit to be less than
1.ꢀmm high.
+Denotes lead(Pb)-free and RoHS compliant.
Note: The Maxim command module (CMAXQUSB) is required
when using the MAX17088 EV kit software.
Component List
The Maxim CMAXQUSB command module provides
the SMBus-compatible interface and is connected to a
PC through the universal serial bus (USB) port. The
MAX17088 EV kit software provides a graphical user
interface (GUI) for exercising the MAX17088 features.
DESIGNATION QTY
DESCRIPTION
10µF 20%, 6.3V XꢀR ceramic
capacitor (0603)
TDK C1608XꢀR0J106M
C1
1
0
C2, C18, C19,
C20, C24
Not installed, ceramic capacitors
(0603)
The MAX17088 is the successor to the MAX8798.
68pF ꢀ%, ꢀ0V C0G ceramic
capacitor (0603)
Murata GRM188ꢀC1H680J
TDK C1608C0G1H680J
C3
C4
1
1
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
0.047µF 10%, ꢀ0V XꢀR ceramic
capacitor (0603)
Murata GRM188R71H473K
TDK C1608X7R1H473K
SMBus is a trademark of Intel Corp.
________________________________________________________________ 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.
MAX17088 Evaluation Kit/
Evaluation System
Component List (continued)
DESIGNATION QTY
DESCRIPTION
2-pin headers
DESIGNATION QTY
DESCRIPTION
JU1, JU2
2
0.22µF 20%, 16V XꢀR ceramic
capacitor (0603)
TDK C1608XꢀR1C224M
Cꢀ
1
2
Low-profile 4.7µH, 1.7A inductor
(1.ꢀmm max height)
Würth S07100060 or
low-profile ꢀ.1µH, 1.ꢀA inductor
(1.ꢀmm max height)
1µF 20%, 10V XꢀR ceramic
capacitors (0603)
TDK C1608XꢀR1A10ꢀM
L1
1
C6, C7
Sumida CDRHꢀD14HPNP-ꢀR1NC
0.1µF 10%, ꢀ0V X7R ceramic
capacitors (0603)
TDK C1608X7R1H104K
C8–C16
C17
9
0
OECON
R1, R6, R7
R2
0
3
1
1
1
2
1
1
2
3
Not installed, test point
200kΩ 1% resistors (0603)
36.ꢀkΩ 1% resistor (0603)
100kΩ 1% resistor (0603)
10Ω ꢀ% resistor (0603)
100kΩ ꢀ% resistors (0603)
24.9kΩ 1% resistor (080ꢀ)
20kΩ ꢀ% resistor (0603)
200Ω ꢀ% resistors (0603)
10kΩ ꢀ% resistors (0603)
Not installed, electrolytic capacitor
(6.3mm x ꢀmm)
R3
4.7µF 10%, 16V XꢀR ceramic
capacitors (1206)
Murata GRM319R61C47ꢀkA88D
TDK C3216XꢀR1C47ꢀK
R4
C21, C22
C23
2
0
1
Rꢀ, R1ꢀ
R8
R9
Not installed, ceramic capacitor
(1206)
Evluate:MAX1708
R10, R11
R12, R13, R14
1A, 30V Schottky diode (S-Flat)
Central Semi CMMSH1-40
Nihon EP10QY03
Not installed, resistor—short
(PC trace) (0603)
D1
R16
0
Toshiba CRS02(TE8ꢀL)
Internal-switch boost regulator
(36 TQFN-EP*)
Maxim MAX17088ETX+
200mA, 100V dual diodes (SOT23)
Fairchild MMBD4148SE
(Top Mark: D4)
Central Semi CMPD7000, lead free
(Top Mark: CꢀC)
U1
1
D2–Dꢀ
J1
4
1
—
—
2
1
Shunts
PCB: MAX17088 EVALUATION KIT+
*EP = Exposed pad.
Dual-row (2 x 10) right-angle
receptacle
Component Suppliers
SUPPLIER
PꢁONE
WEBSITE
Central Semiconductor Corp.
Fairchild Semiconductor
631-43ꢀ-1110
888-ꢀ22-ꢀ372
770-436-1300
847-843-7ꢀ00
847-ꢀ4ꢀ-6700
847-803-6100
949-623-2900
201-78ꢀ-8800
www.centralsemi.com
www.fairchildsemi.com
www.murata-northamerica.com
www.niec.co.jp
Murata Electronics North America, Inc.
Nihon Inter Electronics Corp.
Sumida Corp.
www.sumida.com
TDK Corp.
www.component.tdk.com
www.toshiba.com/taec
www.we-online.com
Toshiba America Electronic Components, Inc.
Würth Electronik GmbH & Co. KG
Note: Indicate that you are using the MAX17088 when contacting these component suppliers.
2
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MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
For instructions on selecting the step-up switching regu-
lator feedback and op-amp divider resistors for other out-
put voltages, see the Output-Voltage Selection section.
MAX17088 EV Kit Files
FILE
DESCRIPTION
Installs the EV kit files on
your computer
Software Procedure
With the EV kit powered on, perform the following steps
to verify software operation:
INSTALL.EXE
MAX17088.EXE
FTD2XX.INF
UNINST.INI
Application program
USB device driver file
Uninstalls the EV kit software
1) On the CMAXQUSB command module, ensure that
the shunt on jumper JU1 is in the +3.3V position.
2) To enable the MAX17088, ensure that a shunt is
installed on jumper JU1 of the MAX17088 EV kit.
USB driver installation help
file
TROUBLESHOOTING_USB.PDF
3) Visit www.maxim-ic.com/evkitsoftware to down-
load the latest version of the MAX17088 EV kit soft-
ware, MAX17088Rxx.ZIP. Save the EV kit software
to a temporary folder and uncompress the ZIP file.
Quick Start
Recommended Equipment
+1.8V to +6V, 2A DC power supply for PIN pad
4) Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the tempo-
rary folder. The program files are copied and icons
are created in the Windows Start | Programs menu.
•
•
MAX17088 EV system
MAX17088 EV kit
CMAXQUSB command module (USB cable
included)
ꢀ) Carefully connect the boards by aligning the
MAX17088 EV kit’s 20-pin connector (J1) with the
CMAXQUSB board’s 20-pin connector (P3). Gently
press them together. The two boards should be
flush against each other.
•
•
User-supplied Windows 2000/XP or Windows Vista
PC with a spare USB port
Voltmeter
6) Connect the USB cable from the PC to the
CMAXQUSB board. A Building Driver Database
window pops up in addition to a New ꢁardware
Found message when installing the USB driver for
the first time. If you do not see a window that is simi-
lar to the one described above after 30s, remove the
USB cable from the board and reconnect it.
Administrator privileges are required to install the
USB device driver on Windows 2000/XP/Vista.
Note: In the following sections, software-related items
are identified by bolding. Text in bold refers to items
directly from the EV kit software. Text in bold and under-
lined refers to items from the Windows operating system.
Hardware Procedure
The MAX17088 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.
7) Follow the directions of the Add New ꢁardware
Wizard to install the USB device driver. Choose the
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX17088 (default installation
directory) using the Browse button. During device
driver installation, Windows may show a warning
message indicating that the device driver Maxim
uses does not contain a digital signature. This is not
an error condition and it is safe to proceed with instal-
lation. Refer to the TROUBLESHOOTING_USB.PDF
document included with the software for additional
information.
1) Verify that a shunt is installed across jumper JU1.
2) Verify that a shunt is not installed across jumper JU2.
3) Connect the positive terminal of the power supply
to the PIN pad. Connect the negative terminal of the
power supply to the GND pad closest to PIN.
4) Turn on the power supply and verify that the step-
up switching regulator output (MAIN) is +8V.
ꢀ) Verify that the gate-on supply (GON) is approxi-
mately +21V.
6) Verify that the gate-off supply (GOFF) is approxi-
mately -13V.
8) Start the MAX17088 EV kit software by opening its
7) Verify that the output of the high-speed op amp
(VCOM) is approximately +3.2V.
icon in the Start | Programs menu.
9) Normal device operation is verified when MAX17088
connected is displayed in the status bar on the
MAX17088 EV kit main window (Figure 1).
_______________________________________________________________________________________
3
MAX17088 Evaluation Kit/
Evaluation System
Figure 1. MAX17088 EV Kit Software Main Window
Evluate:MAX1708
R7. Refer to the Setting the VCOM Adjustment Range
section in the MAX17088 IC data sheet for more details.
Detailed Description of Hardware
The MAX17088 EV kit contains a step-up switching reg-
ulator, positive two-stage charge pump, negative two-
stage charge pump, digitally adjustable VCOM calibra-
tion device with nonvolatile memory, SMBus-compati-
ble interface, high-speed operational amplifier (op
amp), and high-voltage level-shifting scan driver for
TFT-LCD applications. The EV kit operates from a sin-
gle DC power supply between +1.8V and +6V that pro-
vides at least 2A.
The MAX17088 includes a 3-channel, high-voltage
level-shifting driver for driving row-driver functions on
the panel glass. CKV, CKVB, and STVP pads are the
outputs of the driver. The outputs swing between GON
and GOFF according to the input logic levels on the
STV, CPV, and OE pads and the IC’s internal logic.
Refer to the High-Voltage Level-Shifting Scan Driver
section in the MAX17088 IC data sheet for more details.
As configured, the step-up switching regulator (MAIN)
generates a +8V output and provides at least 200mA
from a +1.8V input. It also provides at least 300mA from
a +2.2V input and 600mA from a +4.ꢀV input. The step-
up switching-regulator output voltage can be adjusted
up to +18V with different feedback resistors (see the
Output-Voltage Selection section).
Jumper Selection (JU1, JU2)
The MAX17088 EV kit incorporates jumper JU1 to
enable/disable the IC outputs and jumper JU2 to
enable/disable write protection. When write protection
is enabled, all SMBus commands are ignored by the
device. This prevents device detection and changing of
the VCOM calibrator settings. See Table 1 for jumper
JU1 functions and Table 2 for jumper JU2 functions.
The GON consists of two positive charge-pump stages
to generate approximately +21V and provides greater
than 20mA. The GOFF consists of two negative charge-
pump stages to generate approximately -13V and pro-
vides greater than 20mA. Loading GON and GOFF
Table 1. Jumper JU1 Functions
SꢁUNT
POSITION
SHDN PIN
EV KIT OUTPUTS
reduces the available MAIN current proportionally.
The op-amp output (VCOM) is SMBus programmable
and is configured for an output-voltage range of +2.4V
to +4V. VCOM can source or sink peak current up to
1ꢀ0mA. The output-voltage range can be reconfigured
to other voltages with voltage-divider resistors R6 and
Outputs enabled
(MAIN = +8V)
Installed*
SHDN connected to PIN
SHDN connected to GND
Outputs disabled
(MAIN ≈ PIN)
Not installed
through Rꢀ
*Default position.
4
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MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
Loading 7-Bit DAC Setting
The DAC setting corresponds to a certain sink-current
level, which in turn corresponds to a specific VCOM
voltage. With the MAX17088 EV kit software, the
device’s 7-bit internal DAC is configured by entering an
appropriate DAC setting into the DAC edit box. The
Table 2. Jumper JU2 Functions
SꢁUNT
POSITION
VCOM CALIBRATOR
WRITE PROTECTION
WPN PIN
WPN connected to
GND
Installed
Enabled
Disabled
DAC setting can be set from 0x00 (VCOM
) to 0x7F
MAX
Not
installed*
WPN connected to
VDD through R1ꢀ
(VCOM
). The DAC setting is written to the device by
MIN
pressing the Load DAC button (Figure 1).
*Default position.
Reading 7-Bit DAC
The MAX17088 7-bit DAC is read by either pressing the
Read DAC button or by checking the DAC polling
checkbox. When checked, the software continuously
reads and displays the DAC’s current setting.
Output-Voltage Selection
The MAX17088 EV kit’s step-up switching-regulator out-
put (MAIN) is set to +8V by feedback resistors R1 and
R2. To generate output voltages other than +8V (up to
+18V), select different external voltage-divider resis-
tors, R1 and R2.
Programming MTP
The current DAC setting can be programmed into the
device’s internal MTP by entering an appropriate DAC
setting into the DAC edit box and pressing the
Program button. Pressing the Program button also
loads the current setting into the DAC. Each time the
device is powered on, the DAC is loaded with the set-
ting stored in the device’s MTP. Programming is only
possible when GON is greater than +16V.
Note that changing the MAIN voltage setting changes
the GON and GOFF charge-pump output voltages. The
voltage range on GOFF is limited to -2ꢀV and the voltage
range on GON is limited to +3ꢀV. Setting the MAIN volt-
age above +12V requires reconfiguring the charge
pumps to avoid exceeding +3ꢀV on GON and -2ꢀV on
GOFF.
In addition, output capacitors C21 and C22 are rated
for +16V. To set MAIN for greater than +16V, use high-
er-voltage-rated capacitors. Refer to the Main Step-Up
Regulator, Output-Voltage Selection section in the
MAX17088 IC data sheet for instructions on selecting
resistors R1 and R2.
Simple SMBus Commands
There are two methods for communicating with the
MAX17088, through the MAX17088 EV kit software
main window (Figure 1), or through the interface win-
dow available by selecting the Options | Interface
menu item from the menu bar. The Maxim command
module interface window (Figure 2) includes a 2-wire
interface tab that allows for execution of the
SMBusSendByte(), SMBusReceiveByte(), and
SMBusQuick() commands. See Table 3 for details
regarding SMBus commands. The Command byte
combo box accepts numeric data in binary, decimal, or
hexadecimal. Hexadecimal numbers should be pre-
fixed by $ or 0x. Binary numbers must be exactly eight
digits. See Figure 2 for an illustration of this tool.
Detailed Description of Software
The MAX17088 device includes a calibrator that is
used for adjusting an LCD’s backplane voltage (VCOM)
in TFT-LCD displays. The VCOM voltage is adjusted by
controlling the amount of sink current drawn by the cali-
brator. This is accomplished by programming the
desired setting into the device’s 7-bit internal DAC. The
software also facilitates reading of the device and pro-
gramming of the device’s internal MTP. Refer to the
MAX17088 IC data sheet for further details.
_______________________________________________________________________________________
ꢀ
MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
Figure 2. Command Module Interface Window
Table 3. SMBus Commands
CONTROL
SMBus COMMAND
FORMAT
Input the desired 7-bit DAC setting into the Command byte combo box.
The 7-bit DAC value should be stored in the upper 7 bits (b7–b1) of the
byte, with the LSB = 1.
Load DAC
SMBusSendByte
Input the desired 7-bit DAC setting into the Command byte combo box.
The 7-bit DAC value should be stored in the upper 7 bits (b7–b1) of the
byte, with the LSB = 0.
Load DAC/program MTP
SMBusSendByte
Receives 8 bits from the device. The upper 7 bits correspond to the
current DAC setting and the LSB = 0.
Read DAC
SMBusReceiveByte
SMBusQuick
Search for device address shown in the Target Device Address combo
box. The MAX17088 device address is 0x9E.
Device search
6
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MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
Figure 3. MAX17088 EV Kit Schematic
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7
MAX17088 Evaluation Kit/
Evaluation System
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Figure 4. MAX17088 EV Kit Component Placement Guide—Component Side
8
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MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
Figure ꢀ. MAX17088 EV Kit PCB Layout—Component Side
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MAX17088 Evaluation Kit/
Evaluation System
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Figure 6. MAX17088 EV Kit PCB Layout—Layer 2
10 ______________________________________________________________________________________
MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
Figure 7. MAX17088 EV Kit PCB Layout—Layer 3
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MAX17088 Evaluation Kit/
Evaluation System
Evluate:MAX1708
Figure 8. MAX17088 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.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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