General Description
The MAX17061A evaluation system (EV system) consists
of the MAX17061A evaluation kit (EV kit) and the Maxim
CMAXQUSB+ command module. Windows®2000-,
Windows XP®-, and Windows Vista®-compatible software
are also available for use with the EV system
(MAX17061AEVCMAXQU+) and can be downloaded from
the Maxim website (www.maxim-ic.com/evkitsoftware).
The MAX17061A EV kit (MAX17061AEVKIT+) is a fully
assembled and tested surface-mount PCB that evaluates
the high-efficiency MAX17061A white LED (WLED) driver.
The MAX17061A EV kit utilizes a step-up DC-DC convert-
er to generate the voltage required to drive up to eight
strings of 10 surface-mount WLEDs. The EV kit is pow-
ered from dual supplies (VIN = 5.5V to 24V and VCC =
4.5V to 5.5V) and can be configured to provide a fixed
25mA or adjustable 15mA to 30mA full-scale LED cur-
rent. As shipped, the MAX17061A EV kit is configured for
evaluation with four strings of 10 WLEDs and includes an
I2C/SMBus™-compatible interface that allows for soft-
ware control of the brightness in 256 steps, backlight-
controller operating mode, manufacturer and silicon
revision detection, and fault detection.
The Maxim CMAXQUSB+ command module provides the
I2C/SMBus interface and is connected to the computer
through the universal serial bus (USB) port. The
MAX17061A EV kit software provides a graphical user
interface (GUI) for exercising the MAX17061A features.
Features
o7V to 21V Input Range
oWLED Drives Up to 30mA/String
oDrives Four Strings of 10 WLEDs (Capable of
Driving Up to Eight Strings)
oFull-Scale LED Current Adjustable from 15mA to
30mA, or Preset 25mA
o1MHz PWM Switching Frequency (Selectable:
500kHz or 750kHz, Component Change Required)
oAll Components < 1.2mm Height
oLead(Pb)-Free and RoHS Compliant
oFully Assembled and Tested
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
________________________________________________________________
Maxim Integrated Products
1
19-4654; Rev 0; 5/09
Component Lists
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.
Ordering Information
PART QTY DESCRIPTION
MAX17061AEVKIT 1 MAX17061A EV kit
CMAXQUSB+ 1 I2C/SMBus interface command
module
PART TYPE
MAX17061AEVKIT+ EV Kit
MAX17061AEVCMAXQU+ EV System
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
SMBus is a trademark of Intel Corp.
+
Denotes lead(Pb)-free and RoHS compliant.
Note: The Maxim CMAXQUSB+ command module is required
when using the MAX17061A EV kit software.
MAX17061A EV System
DESIGNATION QTY DESCRIPTION
C1 1
0.1µF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H104K
TDK C1608X7R1H104K
C2 1
0.022µF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H223K
TDK C1608X7R1H223K
MAX17061A EV Kit
DESIGNATION QTY DESCRIPTION
C3 1
4.7µF ±10%, 25V X5R ceramic
capacitor (1206)
Murata GRM319R61E475K
C4 0 Not installed, ceramic capacitor
(1206)
C5, C6 2
1.0µF ±10%, 10V X7R ceramic
capacitors (0603)
Taiyo Yuden LMK107BJ105KA
Murata GRM188R71A105K
C7–C12 6
0.33µF ±10%, 50V X7R ceramic
capacitors (1206)
Murata GRM319R71H334K
TDK C3216JB1H334K
C13–C20,
C22–C30 0Not installed, ceramic capacitors
(0603)
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
2 _______________________________________________________________________________________
Component Lists (continued)
DESIGNATION QTY DESCRIPTION
C21 1
220pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H221K
TDK C1608X7R1H221K
CCV 0 Not installed, test point
D1, D82 2 0.7A, 60V Schottky diodes (US-flat)
Toshiba CUS04
D2–D41 40
White LEDs
Nichia NSSW008CT-P1
OPTEK OVSRWACR6
D42–D81 0 Not installed, white LEDs
J1 1 2 x 10 right-angle receptacle
JU1–JU4,
JU11, JU13 6 3-pin headers
JU5–JU8 0 Not installed, 3-pin headers—short
(PC trace)
JU9 1 2-pin header
MAX17061A EV Kit (continued)
DESIGNATION QTY DESCRIPTION
L1 1
10µH, 1.2A power inductor
Sumida CR6D09HPNP-100MC
TDK VLP6810T-100M1R2
R1 0 Not installed, resistor—short (PC
trace) (0603)
R2 1 2.21MΩ ±1% resistor (0603)
R3 1 61.9kΩ ±1% resistor (0603)
R4 1 130kΩ ±5% resistor (0603)
R5 1 200kΩ multiturn potentiometer
R6 1 41.2kΩ ±1% resistor (0603)
R7 1 500kΩ multiturn potentiometer
R8, R9 0 Not installed, resistors (0603)
R10 1 5.1kΩ ±5% resistor (0603)
R11 1 1MΩ resistor (0603)
U1 1 WLED driver (28 thin QFN)
Maxim MAX17061AETI+
— 7 Shunts
—1P C B: M AX 17061A E V ALU ATION KIT+
Component Suppliers
SUPPLIER PHONE WEBSITE
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
Nichia Corp. 248-352-6575 www.nichia.com
OPTEK Technologies 972-323-2200 www.optekinc.com
Sumida Corp. 847-545-6700 www.sumida.com
Taiyo Yuden 800-348-2496 www.t-yuden.com
TDK Corp. 847-803-6100 www.component.tdk.com
Toshiba America Electronic Components, Inc. 949-623-2900 www.toshiba.com/taec
Note: Indicate that you are using the MAX17061A when contacting these component suppliers.
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
_______________________________________________________________________________________ 3
Quick Start
Recommended Equipment
• MAX17061A EV system
MAX17061A EV kit
Maxim CMAXQUSB+ command module
(USB cable included)
• 7V to 21V, 1A power supply (VIN)
• User-supplied Windows 2000, Windows XP, or
Windows Vista PC
• Available USB port
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 MAX17061A 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.
1) On the CMAXQUSB+ command module, ensure
that the shunt on jumper JU1 is in the 5V (default)
position.
2) On the MAX17061A EV kit, verify that the shunts are
installed as follows:
JU1–JU4, JU13 1-2
JU9 Installed
JU11 2-3
3) Carefully connect the boards by aligning the 20-pin
connector of the MAX17061A EV kit with the 20-pin
header on the CMAXQUSB+ interface board.
Gently press them together.
4) Connect the positive terminal of the VIN power sup-
ply to the VIN pad. Connect the ground terminal of
the VIN power supply to the PGND pad.
5) Connect the positive terminal of the VCC power
supply to the VCC pad. Connect the ground termi-
nal of the VCC power supply to the GND pad.
6) Connect the USB cable from the computer’s type-
A USB port to the CMAXQUSB+ board’s type-B
USB port.
7) Visit www.maxim-ic.com/evkitsoftware to obtain the
latest version of the EV kit software, 17061ARxx.ZIP.
Download and install it on your computer by run-
ning the INSTALL.EXE program. The program files
are copied and icons are created in the Windows
Start menu.
8) Set the VIN power supply to 12V and enable its output.
9) Set the VCC power supply to 5V and enable its output.
10) Start the MAX17061A program by opening its icon
in the Start menu.
11) Normal device operation is verified when CMAXQUSB
HW: Connected. MAX17061A device connected.
is displayed at the bottom left of the MAX17061A EV
kit window (Figure 1).
Detailed Description of Software
User-Interface Panel
The program’s main window (Figure 1) is navigated by
using a mouse or a combination of the keyboard’s tab
and arrow keys. The MAX17061A EV kit software pro-
vides controls for software-configurable features, such
as Brightness Control,Device Control,Faults/Status
detection, and Manufacturer ID and Silicon Revision
detection. Changes to the controls result in a write
operation that updates the appropriate registers of the
MAX17061A. A status box is provided at the bottom of
the program’s main window and is used to verify com-
mand module and device connectivity. A Device
Search option is located under the Action menu bar
should the user want to switch from demo mode to nor-
mal operation.
MAX17061A EV Kit Files
PART DESCRIPTION
INSTALL.EXE Installs the EV kit files on your
computer
MAX17061A.EXE Application program
FTD2XX.INF USB device driver file
UNINST.INI Uninstalls the EV kit software
USB_Driver_Help.PDF USB driver installation help file
Evaluate: MAX17061A
Brightness Control and Level
The MAX17061A can be configured to one of any 256
steps of brightness control. To set the brightness, slide
the Brightness Control track bar to the desired posi-
tion, from 0 to 255. The track-bar position is then dis-
played in the Brightness Level group box.
Device Control
The MAX17061A’s device control register controls the
operating mode of the backlight controller and backlight
on/off states. The MAX17061A operating mode can be
configured according to the bit settings shown in Table 1.
Fault/Status Detection
The MAX17061A’s fault/status read-only register moni-
tors the backlight controller’s operating state. This regis-
ter detects the backlight on/off state, whether one or two
LED output channels are shut down, overcurrent condi-
tions, and thermal faults. When a fault is detected, the
corresponding bit is changed from logic 0 to logic 1 and
the font color is changed to red. Refer to the
MAX17061A IC data sheet for more information regard-
ing the fault/status register.
Manufacturer/Silicon Revision Detection
The ID Register group box provides the manufacturer
and silicon revision information for the MAX17061A IC.
This information is read upon initial startup.
Simple I2C/SMBus Commands
There are two methods for communicating with the
MAX17061A, through the normal user interface (Figure
1), or through the SMBus commands available by
selecting the Interface Diagnostic Window menu item
MAX17061A Evaluation Kit/Evaluation System
4 _______________________________________________________________________________________
Figure 1. MAX17061A EV Kit Software Main Window
Table 1. Operating Modes Selected by
Device Control Register
PWM_MD PWM_SEL OPERATING MODE
X 1 PWM mode
1 0 SMBus mode
0 0 SMBus mode with DPST
X = Don’t care.
from the Action menu bar. The Maxim Command
Module Interface window pops up (Figure 2) and
includes a 2-wire interface tab that allows for execu-
tion of simple I2C/SMBus commands.
The SMBus edit boxes in the Command (SMBus
Protocols, Raw Block Read/Write, EEPROM
Read/Write) group box accept numeric data in binary,
decimal, or hexadecimal. Hexadecimal numbers should
be prefixed by $ or 0x. Binary numbers must be exactly
eight digits. See Figure 2 for an illustration of this tool.
Detailed Description of Hardware
The MAX17061A EV system (MAX17061AEVCMAXQU+)
consists of the MAX17061A EV kit (MAX17061AEVKIT+)
and the Maxim CMAXQUSB+ command module. The EV
kit evaluates the MAX17061A WLED driver and the
CMAXQUSB+ provides the I2C/SMBus-compatible inter-
face for software control of the LED brightness in 256
steps, backlight-controller operating mode, manufacturer
and silicon revision detection, and fault detection.
The MAX17061A EV kit is powered from a 5.5V to 24V
DC supply at VIN and a 4.5V to 5.5V DC supply at VCC.
LED current can be configured to provide a fixed 25mA
or adjustable 15mA to 30mA full-scale LED current
through jumper JU11 and/or resistor R5.
The MAX17061A EV kit utilizes a step-up DC-DC con-
verter to generate the voltage required to drive up to
eight strings of 10 surface-mount WLEDs. As shipped,
the MAX17061A EV kit is configured for evaluation with
four strings of 10 WLEDs.
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
_______________________________________________________________________________________ 5
Figure 2. Interface Diagnostic Window
Evaluate: MAX17061A
White LED String Configuration
As configured, the MAX17061A EV kit is assembled
with four strings of 10 WLEDs (string 1–string 4), but
can be reconfigured to drive up to eight strings of 10
WLEDs. Each string has an associated 3-pin header
(JU1–JU8) and feedback pin (FB1–FB8). To evaluate
additional strings (string 5–string 8), the EV kit must be
reconfigured as follows:
1) Populate String_ with either the WLED listed in the
Component List
, or its equivalent.
2) Cut the trace (solder side) between pins 2-3 of the
string’s associated header-footprint (JU5–JU8).
3) Install a 3-pin header (JU5–JU8) and configure its
shunt according to Table 2.
To evaluate the EV kit with off-board WLED strings, see
the
Off-Board White LED String Configuration
section.
Off-Board White LED String Configuration
The MAX17061A EV kit can also be used to drive off-
board WLED strings. To evaluate external WLED
strings, remove the shunts from jumpers JU1–JU8. See
Table 2 for jumpers JU1–JU8 configuration and Table 3
for jumper JU9 configuration. Removing these jumpers
effectively disconnects the on-board WLED strings
between the output and feedback pins, allowing the
connection of external WLED strings. For each external
WLED string, connect the cathode terminal of the string
to the corresponding feedback pad (FB1–FB8) and
connect the anode terminal of the string to the VOUT
pad. Once the external WLED strings are connected
between the VOUT pad and the FB_ pins, the EV kit
can be evaluated in the same manner as the on-board
WLED strings. Evaluating more than 10 WLEDs per
string may require component changes. Refer to the
MAX17061A IC data sheet for component selections.
LED String Capacitance
In some LCD panel applications, a 0.1µF (typ) capacitor
(CLED) is placed in parallel with each LED string
to improve ESD immunity. As such, the MAX17061A EV
kit provides a footprint across each LED string in addi-
tion to footprints for pullup resistors on each FB_ pin.
Refer to the
LCD Panel Capacitance
section in the
MAX17061A IC data sheet for more detailed information.
Setting Full-Scale LED Current (ILED(FS))
The full-scale current through each WLED string is con-
figured by connecting the ISET pin (pin 24) to VCC or
connecting it to GND through resistors R4 and R5.
When ISET is connected to VCC, the full-scale current
per string is set to 25mA; when pulled to GND, the full-
scale current per string is adjustable from 15mA to
30mA:
where R4 is a 130kΩresistor and R5 is a 200kΩpoten-
tiometer. The ISET pin is configured through jumper
Ik
RR
mA
LED FS()
=×
+
⎛
⎝
⎜⎞
⎠
⎟
20 200
45
Ω
MAX17061A Evaluation Kit/Evaluation System
6 _______________________________________________________________________________________
Table 2. Jumper JU1–JU8 Function
SHUNT
POSITION FB_ PIN STRING_
1-2 Connected to cathode of
WLED string Enabled
2-3 Connected to VCC Disabled
Not
installed
Connect to an external
WLED string
On-board WLED
string not used
Table 3. Jumper JU9 Function
SHUNT
POSITION VOUT
Installed* C onnected to anod es of on- b oar d WLE D str i ng s
Not
installed Connect to anodes of off-board WLED strings
*
Default position.
Table 4. Jumper JU11 Function
SHUNT
POSITION ISET PIN ILED(FS)
1-2 Connected to VCC 25mA
2-3* Connected to GND
through R4 and R5
Adjustable from
15mA to 30mA
*
Default position.
JU11. See Table 4 for jumper JU11 settings.
Switching-Frequency Selection (OSC)
The MAX17061A EV kit is configured to operate at
1MHz, but provides the option to set the switching fre-
quency of the step-up DC-DC converter to 500kHz or
750kHz. The switching frequency is set by configuring
JU13 to the shunt position, as shown in Table 5.
Changing the switching frequency could require differ-
ent converter components (refer to the MAX17061A IC
data sheet for proper component selections).
Setting DPWM Frequency (fDPWM)
The MAX17061A uses an internal DPWM signal to perform
dimming control. The DPWM frequency is specified by an
external resistor, connected from the FSET pin to GND:
where α= 10.638, β= 5.5, γ= 58509.
The adjustable range for the FSET resistor (RFSET) is
from 64kΩto 465kΩ, corresponding to the DPWM fre-
quency of 1350Hz to 200Hz. RFSET consists of resis-
tors R6 and R7 on the EV kit, where R6 is a 41.2kΩ
resistor and R7 is a 500kΩpotentiometer. If making
adjustments, note that the minimum usable frequency
results from a maximum resistance of 465kΩ.
fHz RFSET RFSET
DPWM[]=×+××
=×+
10
1000
10
99
ααβαγ
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
_______________________________________________________________________________________ 7
Table 5. Jumper JU13 Function
SHUNT
POSITION OSC PIN OPERATING
FREQUENCY
1-2* Connected to VCC 1MHz
2-3 Connected to GND 500kHz
Not
installed Unconnected 750kHz
*
Default position.
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
8 _______________________________________________________________________________________
Figure 3. MAX17061A EV Kit Schematic
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
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Figure 4. MAX17061A EV Kit Component Placement Guide—Component Side
Evaluate: MAX17061A
MAX17061A Evaluation Kit/Evaluation System
10 ______________________________________________________________________________________
Figure 5. MAX17061A EV Kit PCB Layout—Component 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 ____________________
11
© 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Evaluate: MAX17061A
MAX17061 Evaluation Kit/Evaluation System
Figure 6. MAX17061A EV Kit PCB Layout—Solder Side
