Maxim Integrated MAX8790A Evaluation Kit MAX8790AEVKIT+ MAX8790AEVKIT+ Data Sheet
Product codes
MAX8790AEVKIT+
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
•
25V, 1A power supply (VIN)
Procedure
The MAX8790A 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.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Verify that the shunts are installed as follows:
2) Connect the positive terminal of the VIN power sup-
ply to the VIN pad on the EV kit and connect the
ground terminal of the VIN power supply to the
PGND pad on the EV kit.
ground terminal of the VIN power supply to the
PGND pad on the EV kit.
3) Set the VIN power supply to 12V and enable its
output.
4) Verify that both WLED strings are lit.
Detailed Description
The MAX8790A EV kit is a high-efficiency WLED driver
that utilizes a step-up DC-DC converter optimized to gen-
erate the necessary output voltage for driving six strings
of WLEDs. The EV kit is powered by a 7V to 21V input
power supply and can be configured to provide a fixed
20mA or adjustable 15mA to 25mA full-scale LED current.
that utilizes a step-up DC-DC converter optimized to gen-
erate the necessary output voltage for driving six strings
of WLEDs. The EV kit is powered by a 7V to 21V input
power supply and can be configured to provide a fixed
20mA or adjustable 15mA to 25mA full-scale LED current.
Evaluates: MAX8790A
MAX8790A Evaluation Kit
2
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Component Suppliers
Note: Indicate that you are using the MAX8790A when contacting these component suppliers.
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
R1
1
51k
Ω ±5% resistor (0603)
R2
1
100k
Ω potentiometer, multiturn
R3
1
511k
Ω ±1% resistor (0603)
R4
1
37.4k
Ω ±1% resistor (0603)
R5
1
1M
Ω ±1% resistor (0603)
R6
1
56m
Ω ±1%, 0.5W resistor (1206)
IRC LRC-LRF-1206LF-01-R056-F
Vishay WSL1206R0560FEA18
Vishay WSL1206R0560FEA18
R7
0
Not installed, resistor—short
(PC trace) (0603)
(PC trace) (0603)
SUPPLIER
PHONE
WEBSITE
Fairchild Semiconductor
888-522-5372
www.fairchildsemi.com
IRC, Inc.
361-992-7900
www.irctt.com
KEMET Corp.
864-936-6300
www.kemet.com
Murata Electronics North America, Inc.
770-436-1300
www.murata-northamerica.com
Nichia Corp.
248-352-6575
www.nichia.com
Nihon Inter Electronics Corp.
847-843-7500
www.niec.co.jp
OPTEK Technologies
972-323-2200
www.optekinc.com
SANYO Electric Co., Ltd.
619-661-6835
www.sanyodevice.com
Sumida Corp.
847-545-6700
www.sumida.com
TDK Corp.
847-803-6100
www.component.tdk.com
Toshi b a Am eri ca E l ectr oni c C om p onents, Inc.
949-623-2900
www.toshiba.com/taec
Vishay
402-564-3131
www.vishay.com
DESIGNATION
QTY
DESCRIPTION
R8
1
1.2k
Ω ±5% resistor (0603)
R9, R10
2
100k
Ω ±5% resistors (0603)
R11–R16
0
Not installed, resistors (0603)
U1
1
Six-string white LED driver
(20 TQFN)
Maxim MAX8790AETP+
(20 TQFN)
Maxim MAX8790AETP+
—
8
Shunts
—
1
PCB: MAX8790A Evaluation Kit+
JUMPER
DEFAULT SHUNT POSITION
JU1, JU6, JU7
1-2
JU2, JU4
Not installed
JU3
2-3
JU5, JU12
Installed