MAX17094 [MAXIM]
Digitally Programmable Op-Amp Output Voltage;
| 型号： | MAX17094 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Digitally Programmable Op-Amp Output Voltage |
| 文件： | 总13页 (文件大小：569K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4451; Rev 0; 2/09
MAX17094 Evaluation Kit
Evluates:MAX17094
General Description
Features
The MAX17094 evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount PCB that provides the
voltages and features required for active-matrix, thin-
film transistor (TFT), liquid-crystal displays (LCDs). The
EV kit contains a high-performance step-up switching
regulator, a 250mA low-dropout (LDO) linear regulator,
a high-speed op amp, a digitally adjustable VCOM cali-
brator, and seven high-voltage level-shifting buffers for
scan-driver applications.
o +1.8V to +5.5V Input Range
o Adjustable 450kHz to 1.2MHz Step-Up Switching
Frequency
o Output Voltages
+8V Output at 300mA (Step-Up Switching
Regulator)
+21.5V Output at 30mA (Positive Charge Pump)
-6.5V Output at 30mA (Negative Charge Pump)
+2.5V at 250mA (Linear Regulator)
150mA High-Current Op-Amp Output
The EV kit operates from a DC supply voltage from
+1.8V to +5.5V. The step-up switching regulator is con-
figured for a +8V output providing at least 300mA from
a +2.5V input. The positive charge pump is configured
for a +21.5V output providing up to 30mA. The negative
charge pump is configured for a -6.5V output providing
up to 30mA. The op amp is capable of providing up to
150mA peak and features a programmable output
voltage initially configured for +3.2V. The low-voltage,
low-dropout linear regulator can provide at least
250mA. The high-voltage, level-shifting scan driver
buffers seven logic inputs and shifts them to a desired
level to drive TFT LCD row logic.
o Resistor-Adjustable Switching Regulator and Op-
Amp Output Range
o Digitally Programmable Op-Amp Output Voltage
o +30V to -10V High-Voltage Level-Shifting Drivers
o > 85% Efficiency (Step-Up Switching Regulator)
2
o On-Board I C/SMBus Interface Control through
USB
o Windows 2000/XP- and Windows Vista (32-Bit)-
Compatible Software
o 2mm Low-Profile Surface-Mount Components
o Lead(Pb)-Free and RoHS Compliant
o Fully Assembled and Tested
The MAX17094 EV kit demonstrates low quiescent cur-
rent and high efficiency (> 85%) for maximum battery
life. Operation at 1.2MHz allows the use of tiny surface-
mount components. The MAX17094 thin QFN package
(0.8mm max height), with low-profile external compo-
nents, allows this circuit to be less than 2mm high.
Ordering Information
2
The MAX17094 EV kit provides an on-board I C/
PART
TYPE
SMBus™ interface and connects to the computer through
the universal serial bus (USB) port. The EV kit includes
MAX17094EVKIT+
EV Kit
®
®
®
Windows 2000/XP and Windows Vista -compatible
software that provides a graphical user interface (GUI) for
control of the MAX17094’s programmable features.
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
4.7µF 10%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J475K
TDK C1608X5R0J475K
0.1µF 10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
TDK C1608X7R1H104K
C6–C9, C14,
C16–C19, C34
C1
1
10
1µF 20%, 6.3V X5R ceramic
capacitors (0402)
Murata GRM155R60J105K
TDK C1005X5R0J105M
Not installed, ceramic capacitor
(0805)
C10
0
2
C2, C3
C5
2
1
4.7µF 10%, 16V X5R ceramic
capacitors (0805)
Murata GRM21BR61C475K
Taiyo Yuden EMK212BJ475KG
C11, C12
10µF 20%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J106M
TDK C1608X5R0J106K
SMBus is a trademark of Intel Corp.
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft 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.
MAX17094 Evaluation Kit
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
0.033µF 10%, 16V X5R ceramic
capacitor (0603)
Taiyo Yuden EMK107BJ333KA
1000pF 10%, 50V X7R ceramic
capacitor (0402)
Murata GRM155R71H102K
TDK C1005X7R1H102K
C56
1
8
3
C13
1
3900pF 10%, 50V X7R ceramic
capacitors (0402)
Murata GMD155R71H392K
C66–C73
D1, D2, D3
0.47μF 10%, 25V X5R ceramic
capacitor (0603)
Murata GRM188R71E474K
TDK C1608X5R1E474K
C15
1
8
30V, 200mA dual diodes (3 SOT23)
Zetex BAT54S
Fairchild BAT54S
100pF 5%, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H101J
TDK C1005C0G1H101J
30V, 1A Schottky diode (S-Flat)
Toshiba CRS02
D4
H1
1
0
C20–C27
Not installed, 2 x 5-pin JTAG
header
C28, C29, C31,
C58–C65
Not installed, ceramic capacitors
(0402)
0
0
0
JU1, JU3–JU11,
JU14–JU21
18
3-pin headers
Not installed, through-hole
OS-CON capacitor
(OSCON-B)
C30
C32
JU2
1
0
2-pin header
Evluates:MAX17094
JU12, JU13
Not installed, 2-pin headers
Not installed, ceramic capacitor
(0603)
4.1µH, 1.95A, 57MΩ inductor (6mm
x 6mm x 2mm)
Sumida CDRH5D18NP-4R1NC
Coiltronics SD6020-4R1-R
L1
1
15pF 5%, 50V C0G ceramic
capacitor (0402)
Murata GRM1555C1H150J
TDK C1005C0G1H150J
C33
C35
1
1
Ferrite bead (0603)
TDK MMZ1608R301A
Murata BLM18SG700 TN1
L2
P1
1
1
0.22μF 10%, 16V X7R ceramic
capacitor (0603)
Murata GRM188R71C224K
TDK C1608X7R1C224K
USB type-B right-angle PC-mount
receptacle
R1
1
3
1
1
1
1
63.4kΩ 1% resistor (0402)
200kΩ 1% resistors (0402)
36.5kΩ 1% resistor (0402)
40.2kΩ 1% resistor (0402)
6.81kΩ 1% resistor (0402)
15kΩ 1% resistor (0402)
1μF 10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C105K
TDK C1608X5R1C105K
R2, R16, R17
C36–C39, C42,
C44
6
3
8
R3
R4
R5
R6
10μF 10%, 16V X5R ceramic
capacitors (0805)
KEMET C0805C106K4PACTU
C40, C43, C45
R7, R9–R15,
R28, R29
10
0
100kΩ 5% resistors (0402)
0.1μF 10%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
Murata GRM188R71C104K
C41, C48–C53,
C57
R8, R32, R33,
R34
Not installed, resistors (0603)
R18
R19, R20
R21
1
2
1
21kΩ 1% resistor (0402)
0Ω resistors (0402)
22pF 5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J or
TDK C1608C0G1H220J
C46, C47
C54, C55
2
2
24.9kΩ 1% resistor (0402)
R22, R23, R26,
R27, R48–R59
16
1
604Ω 1% resistors (1206)
80.6kΩ 1% resistor (0402)
10pF 5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
TDK C1608C0G1H100J
R24
2
_______________________________________________________________________________________
MAX17094 Evaluation Kit
Evluates:MAX17094
Component List (continued)
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
Not installed, resistor—shorted by
PCB trace (0603)
Microcontroller (68 QFN-EP*)
Maxim MAXQ2000-RAX+
R25
0
U2
U3
1
1
R30, R31
R35
2
1
1
2
1
1
1
1
10kΩ 5% resistors (0402)
169kΩ 1% resistor (0603)
100kΩ 1% resistor (0603)
27Ω 5% resistors (0603)
1.5kΩ 5% resistor (0603)
2.2kΩ 5% resistor (0603)
470Ω 5% resistor (0603)
10kΩ 5% resistor (0603)
2.5V LDO regulator (5 SO70)
Maxim MAX8511EXK25+
Adjustable output LDO regulator
(5 SO70)
Maxim MAX8512EXK+
R36
U4
U5
1
1
1
2
R37, R38
R39
UART-to-USB converter (32 TQFP)
FTDI FT232BL
R40
R41
93C46 type (64k x 16) 3-wire EEPROM
(8 SO)
Atmel AT93C46EN-SH-B
R42
U6
Not installed, resistors—shorted by
PCB trace (0402)
R43–R47
SW1
0
1
1
®
Logic-level translators (10 µMAX )
Maxim MAX1840EUB+
U7, U8
7-position low-profile surface-mount
DIP switch
Y1
Y2
—
—
1
1
16MHz crystal
2-position low-profile surface-mount
DIP switch
6MHz crystal
SW2
19
1
Shunts
Internal switch boost regulator
(48 TQFN-EP*)
Maxim MAX17094ETM+
PCB: MAX17094 EVALUATION KIT+
U1
1
*EP = Exposed pad.
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Cooper Bussmann
916-941-1117
888-522-5372
864-963-6300
770-436-1300
847-545-6700
800-348-2496
847-803-6100
949-623-2900
631-543-7100
www.cooperet.com
www.fairchildsemi.com
www.kemet.com
Fairchild Semiconductor
KEMET Corp.
Murata Electronics North America, Inc.
Sumida Corp.
www.murata-northamerica.com
www.sumida.com
Taiyo Yuden
www.t-yuden.com
TDK Corp.
www.component.tdk.com
www.toshiba.com/taec
www.zetex.com
Toshiba America Electronic Components, Inc.
Zetex Semiconductors
Note: Indicate that you are using the MAX17094 when contacting these component suppliers.
MAX17094 EV Kit Files
FILE
INSTALL.EXE
DESCRIPTION
Installs the EV kit files on your computer
Application program
MAX17094.EXE
FTD2XX.INF
USB device driver file
UNINST.INI
Uninstalls the EV kit software
USB driver installation help file
TROUBLESHOOTING_USB.PDF
µMAX is a registered trademark of Maxim Integrated Products, Inc.
_______________________________________________________________________________________
3
MAX17094 Evaluation Kit
described above after 30 seconds, 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.
Quick Start
Recommended Equipment
1.8V to 5.5V, 2A DC power supply
•
•
User-supplied Windows 2000/XP or Windows Vista
PC with a spare USB port
10) Follow the directions of the Add New Hardware
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\MAX17094 (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.
•
Voltmeter
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
underlined refers to items from the Windows operating
system.
Procedure
The MAX17094 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.
11) Start the MAX17094 EV kit software by opening its
icon in the Start | Programs menu.
1) Verify that a shunt is installed across jumper JU2.
12) Normal device operation is verified when
MAX17094 device connected appears in the
status bar on the MAX17094 EV kit main window
(Figure 1).
2) Set an external power supply to ≈ +3.3V. Connect
the positive terminal of the power supply to the VIN
pad. Connect the negative terminal of the power
supply to the PGND pads closest to VIN.
Evluates:MAX17094
13) Verify that the output of the high-speed op amp
(VCOM) is approximately +3.2V.
3) Turn on the power supply and verify that the step-
up switching regulator output (MAIN) is +8V.
4) Verify that the positive charge-pump supply (VP) is
approximately +24V.
5) Verify that the negative charge-pump supply (VN) is
approximately -8.8V.
6) Verify that the linear regulator output (VLOGIC) is
approximately 2.5V.
7) Visit www.maxim-ic.com/evkitsoftware to down-
load the latest version of the MAX17094 EV kit soft-
ware, MAX17094Rxx.ZIP. Save the EV kit software
to a temporary folder and uncompress the ZIP file.
8) 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.
9) Connect the USB cable from the PC to the EV kit
board. A Building Driver Database window pops
up in addition to a New Hardware Found message
when installing the USB driver for the first time. If
you do not see a window that is similar to the one
Figure 1. MAX17094 EV Kit Software Main Window
4
_______________________________________________________________________________________
MAX17094 Evaluation Kit
Evluates:MAX17094
open when driving A2–A8 with external logic. Use
jumpers JU14–JU18 to select between capacitive loads
on outputs Y2–Y8 and YDCHG for testing purposes.
Detailed Description of Hardware
The MAX17094 EV kit contains a high-performance
step-up switching regulator, a 250mA LDO, a positive
two-stage charge pump, a negative single-stage
charge pump, a high-speed op amp, and seven high-
voltage level-shifting buffers for scan-driver applica-
tions. The EV kit operates from a DC power supply
between +1.8V and +5.5V that provides at least 2A.
GOFF Power Supply (JU1)
The MAX17094 EV kit incorporates jumper JU1 to pro-
vide an option to supply the gate-off (GOFF) supply.
GOFF can be supplied either through the on-board
negative charge pump (VN) or with an externally
applied voltage at the GOFF pad. See Table 1 for
jumper JU1 configuration.
As configured, the step-up switching regulator (VMAIN)
generates a +8V output and provides at least 300mA.
The step-up switching-regulator output voltage can be
adjusted up to +14V with different feedback resistors
(see the Output-Voltage Selection section).
Enable (JU2)
The MAX17094 EV kit incorporates jumper JU2 to
enable/disable the IC outputs. When EN is pulled low,
the DC-DC converter and op amp are disabled. The
high-voltage drivers and LDO will remain active if suffi-
cient voltage is available for operation. See Table 2 for
jumper JU2 configuration.
The GON consists of two positive charge-pump stages
to generate approximately +21.5V and provides
up to 30mA. The GOFF consists of a single negative
charge-pump stage to generate approximately -6.5V
and provides up to 30mA. Loading GON and GOFF
reduces the available VMAIN current proportionally.
GON1, GON2 Power Supply (JU3, JU4)
The MAX17094 EV kit incorporates jumpers JU3 and
JU4 to provide an option to supply the gate-on (GON1,
GON2) supplies. GON1 and GON2 can be supplied
either through the on-board positive charge pump (VP)
or with an externally applied voltage at the respective
GON_ pad. See Table 3 for jumpers JU3 and JU4 con-
figuration.
The op-amp output (VCOM) is SMBus programmable
and is configured for a +2.4V to +4V output-voltage
range. VCOM can source or sink peak current up to
150mA. The output-voltage range can be reconfigured
to other voltages with voltage-divider resistors R16 and
R17. Refer to the Setting the VCOM Adjustment Range
section in the MAX17094 IC data sheet for more details.
The seven logic-level to high-voltage level-shifting
buffers can buffer seven logic inputs (A2–A8) and shift
them to a desired level (Y2–Y8) to drive TFT LCD row
logic. Each buffer outputs the voltage on the GOFF pin
(set through JU1) when its respective input is logic-low.
Each buffer (Y2–Y6) outputs the voltage-on GON1 (set
through JU3) when its respective input is logic-high.
Similarly, Y7 and Y8 output the voltage on GON2 (set
through JU4).
Table 2. Jumper JU2 Functions
SHUNT
POSITION
EN PIN
EV KIT OUTPUTS
Outputs enabled
(MAIN = +8V)
Installed*
Connected to VIN
Pulled to AGND
through R7
Outputs disabled
(MAIN ≈ VIN)
Not installed
The seven switches within SW1 are used to select logic
levels on A2–A8 for testing purposes. Set each switch
*Default position.
Table 3. Jumper JU3, JU4 Functions
Table 1. Jumper JU1 Functions
SHUNT
SHUNT
GON_ PIN
POSITION
GOFF PIN
POSITION
Supplied on board through positive charge
pump (VP)
Supplied on board through negative charge
pump (VN)
1-2*
1-2*
External user-supplied voltage applied at GON_
pad
2-3
External user-supplied voltage applied at GOFF pad
2-3
*Default position.
*Default position.
_______________________________________________________________________________________
5
MAX17094 Evaluation Kit
Level-Shifter Logic-Level Inputs
(JU5–JU11)
The MAX17094 level-shifter inputs can be supplied
either using the on-board logic or from an externally
applied signal through configuration of jumpers
JU5–JU11. Additionally, when using on-board logic,
SW1 controls the logic levels based on its own settings.
When SW1 is on, the logic input is high. When SW1 is
off, the logic input is pulled low through a 100kΩ pull-
down resistor. See Table 4 for jumpers JU5–JU11 con-
figuration.
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 MAX17094 EV kit software, the
device’s 7-bit internal DAC is configured by entering an
appropriate DAC setting into the Load DAC edit box.
The DAC setting can be set from 0x00 (VCOM
) to
MIM
0x7F (VCOM
). The DAC setting is written to the
device by pressing the Load DAC button (Figure 1).
MAX
Reading 7-Bit DAC
The MAX17094 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.
Level-Shifter Output Loading (JU14–JU21)
The MAX17094 EV kit incorporates jumpers JU14–JU21
to provide loading options at the level-shifter outputs,
YDCHG and Y2–Y8. See Table 5 for jumpers JU14–JU21
configuration.
Access Control Register
The Write To group box is used to select whether
volatile (WR) or nonvolatile (IVR) memory is accessed
during read and write cycles involving the data register.
When the WR/IVR radio button is selected, data on the
data register is written to both the WR and IVR. When
the WR Only radio button is selected, data on the data
register is written to the WR only.
Output-Voltage Selection
The MAX17094 EV kit’s step-up switching-regulator out-
put (VMAIN) is set to +8V by feedback resistors R2 and
R3. To generate output voltages other than +8V (up to
+14V), select different external voltage-divider resis-
tors, R2 and R3. Note that changing the VMAIN voltage
setting changes the VN and VP charge-pump output
voltages. Refer to the Main Step-Up Regulator and
Output-Voltage Selection sections in the MAX17094 IC
data sheet for more information.
Evluates:MAX17094
Simple SMBus Commands
There are two methods for communicating with the
MAX17094: through the MAX17094 EV kit software
main window (Figure 1), or through the interface win-
dow available by selecting the Action | Interface
Diagnostic Window menu item from the menu bar. The
Maxim command module interface window (Figure 2)
includes a 2-wire interface tab that allows for execu-
tion of the SMBusSendByte(), SMBusReceiveByte(),
and SMBusQuick() commands. See Table 6 for details
regarding SMBus commands.
Detailed Description of Software
The MAX17094 device includes a calibrator used for
adjusting an LCD’s backplane voltage (VCOM) in TFT
LCD displays. The VCOM voltage is adjusted by con-
trolling the amount of sink current from a current source
connected to the POS terminal of the op amp. This is
accomplished by programming the desired setting into
the device’s 7-bit internal DAC. The MAX17094 sup-
The Command byte and Data Out combo boxes
accept numeric data in binary, decimal, or hexadeci-
mal. Hexadecimal numbers should be prefixed by $ or
0x. Binary numbers must be exactly eight digits. See
Figure 2 for an illustration of this tool.
2
ports four different I C slave addresses; configure SW2
to select between different addresses. Refer to the
MAX17094 IC data sheet for further details.
Table 4. Jumper JU5–JU11 Functions
Table 5. Jumper JU14–JU21 Functions
SHUNT
SHUNT
A2–A8 INPUT PINS
POSITION
YDCHG, Y2–Y8 PINS
POSITION
1-2*
2-3
Minimum loading
Maximum loading
Supplied through external signal applied at
A2–A8 pad
1-2
2-3*
Supplied on board based on SW1 states
*Default position.
*Default position.
6
_______________________________________________________________________________________
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 2. Command Module Interface Window
Table 6. SMBus Commands
SMBus
COMMAND
CONTROL
FORMAT
Input the desired 7-bit DAC setting into the Data Out combo box. The 7-bit DAC value should
be stored in the lower 7 bits (b6–b0) of the byte; the MSB is ignored.
Load DAC SMBusWriteByte
Read DAC SMBusReadByte
Receives 8 bits from the device. The lower 7 bits correspond to the current DAC setting and
the MSB is ignored.
Device
Search for device address shown in the Target Device Address combo box. The MAX17094
device address can be 50, 52, 54, or 56.
SMBusQuick
search
_______________________________________________________________________________________
7
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 3a. MAX17094 EV Kit Schematic (Sheet 1 of 3)
8
_______________________________________________________________________________________
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 3b. MAX17094 EV Kit Schematic (Sheet 2 of 3)
_______________________________________________________________________________________
9
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 3c. MAX17094 EV Kit Schematic (Sheet 3 of 3)
10 ______________________________________________________________________________________
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 4. MAX17094 EV Kit Component Placement Guide—Component Side
______________________________________________________________________________________ 11
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 5. MAX17094 EV Kit PCB Layout—Component Side
12 ______________________________________________________________________________________
MAX17094 Evaluation Kit
Evluates:MAX17094
Figure 6. MAX17094 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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