ON Semiconductor CAT4106 User manual

©Semiconductor Components Industries, LLC, 2011
October, 2011 −Rev. 1
1Publication Order Number:
EVBUM2024/D
CAT4106AGEVB
CAT4106 LED Driver
Evaluation Board
User's Manual
Introduction
This document describes the CAT4106AGEVB
evaluation board for the CAT4106 quad-channel DC/DC
boost LED driver. The major operating characteristics of the
CAT4106 can be measured with this board.
The CAT4106 DC/DC converter is capable of driving up
to 4 strings of LEDs with tight matching. This device is
designed to drive LED strings up to 36 V. The LED
brightness is set by a single resistor from the RSET pin to
GND and PWM dimming is available via the EN/PWM pin.
Additional information can be found in the CAT4106 data
sheet.
Figure 1. CAT4106AGEVB Board
Operation Procedure
The CAT4106AGEVB board contains one CAT4106 in
a typical application circuit. The board can be powered in
two different ways. With the J1 jumper in place a single high
voltage supply (6 V to 24 V) can be applied between VL and
GND. A circuit on board will generate a lower, regulated
voltage for the VIN pin (6.2 V – VGS of transistor M1). VIN
can also be powered separately by removing the J1 jumper
and applying a second voltage to the VIN test point. The
voltage at VIN should not exceed 6.0 V.
VFMAX and VFMIN are set by potentiometers R4 and
R6 respectively. The VFMIN potentiometer is located
closest to the VIN test point. These can be used to set the
maximum and minimum allowable forward voltages for any
given LED string. For the CAT4106AGEVB, the settings for
these potentiometers are calculated as follows:
R4 +69.8 kW ǒVFMAX
1.2 V *1Ǔ*100 kW(eq. 1)
R6 +60 kW ǒVFMIN
1.2 V *1Ǔ*100 kW(eq. 2)
Any open LED conditions will trigger a fault condition.
Any short LED conditions will only trigger a fault condition
during power-up. A red LED will turn on when a fault
condition takes place.
The LED current is set by potentiometer R13 which is
labeled RSET on the CAT4106AGEVB. The anode end of
each LED string should be connected to VOUT and the
cathode ends can be connected at the available header
connectors J5 and J6. Placing jumpers on J5 and J6 headers
allows to short two or more LED channels together.
EN or PWM input signals can be connected at the
EN/PWM test point. The voltage at EN/PWM should not
exceed 6.0 V. The CAT4106 can support PWM frequencies
up to 2 kHz.
http://onsemi.com
EVAL BOARD USER’S MANUAL

CAT4106AGEVB
http://onsemi.com
2
Figure 2. CAT4106AGEVB Board Schematic
R5
69.8 kW
C3
10 mF
VOUT
LED1
9
7
13
10
5
2
VIN
EN/PWM
RSET
CTRL
FB
CAT4106
U1
VFMAX
VFMIN
LED1
LED2
LED3
LED4
FAULT
12
11
1
16
15
14
3
GND PGND
SW
4
6
LED1
LED2
LED3
LED4
FAULT
R7
60 kW
R11
100 kW
R12
100 kW
R4
2.2 MW
R6
2.2 MW
D
SW
SW
SW
C2
4.7 mF
L
47 mH
M1
R8
60 kW
R9
100 W
J1
12
VIN
EN/PWM
Z1
6.2 V
C1
1 mF
R1
649 W
R13
20 kW
R2
28 kW
R3
28 kW
VL
GND
VIN
R14
100 kW
EN/PWM
EN/PWM
VINFAULT R10
1 kW
J5 J6
LED1 11
LED2
LED2 22
LED3
LED3 33
LED4
LED4 44
Table 1. BILL OF MATERIALS
Name Manufacturer Description Part Number Units
U1 ON Semiconductor 4-Channel Boost LED Driver, 4 mm x 4 mm TQFN CAT4106 1
C1 AVX Ceramic Capacitor 1.0 mF/10 V, 10%, X5R, 0603 0603ZD105KAT2A 1
C2 AVX Ceramic Capacitor 4.7 mF/25 V, 10%, X5R, 1206 12063D475KAT2A 1
C3 Taiyo Yuden Ceramic Capacitor 10 mF/ 35 V, 10%, X5R, 1210 GMK325BJ106KN-T 1
R1 Yageo SMT Resistor 0.1 W, 649 W, 0603 RC0603FR-07649RL 1
R2, R3 Yageo SMT Resistor, 0.1 W, 28 kW, 0603 RC0603FR-0728KL 2
R4, R6 Vishay Trimmer Potentiometer, 2.2 MWT93YB225K 2
R5 Yageo SMT Resistor, 0.1 W, 69.8 kW, 0603 RC0603FR-0769K8L 1
R7, R8 Yageo SMT Resistor, 0.1 W, 60.4 kW, 0603 RC0603FR-0760K4L 2
R9 Yageo SMT Resistor, 0.1 W, 100 W, 0603 RC0603FR-07100RL 1
R10 Tyco SMT Resistor, 0.1 W, 1 kW, 0603 RC0603FR-071KL 1
R11, R12, R14 Yageo SMT Resistor, 0.1 W, 100 kW, 0603 RC0603FR-07100KL 3
R13 Vishay Trimmer Potentiometer, 20 kWT73YE-20K-ND 1
L Coiltronics Inductor 47 mH, 1.08 A DR73-470-R 1
D NXP Schottky Diode, 60 V/1 A PMEG6010CEJ T/R 1
M1 ON Semiconductor N-Channel MOSFET, 60 V/115 mA 2N7002L 1
Z1 ON Semiconductor Zener Diode, 6.2 V MM3Z6V2 1
J1, J2 Tyco 2 Pin Header Connector 0.1” Pitch 640452-2 2
J5, J6 Tyco 4 Pin Header Connector 0.1” Pitch 640452-4 2
Mil-Max Pin Receptacle (Test Points) #0149-0-15-01-30-14-04-0
(or equiv)
6
LiteOn SMT Red LED LTST-T970KRKT 1

www.onsemi.com
1
ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or
other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s
product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is
subject to all applicable copyright laws and is not for resale in any manner.
The evaluation board/kit (research and development board/kit) (hereinafter the “board”) is not a finished product and is as such not available for sale to consumers. The board is only intended
for research, development, demonstration and evaluation purposes and should as such only be used in laboratory/development areas by persons with an engineering/technical training
and familiar with the risks associated with handling electrical/mechanical components, systems and subsystems. This person assumes full responsibility/liability for proper and safe handling.
Any other use, resale or redistribution for any other purpose is strictly prohibited.
The board is delivered “AS IS” and without warranty of any kind including, but not limited to, that the board is production−worthy, that the functions contained in the board will meet your
requirements, or that the operation of the board will be uninterrupted or error free. ON Semiconductor expressly disclaims all warranties, express, implied or otherwise, including without
limitation, warranties of fitness for a particular purpose and non−infringement of intellectual property rights.
ON Semiconductor reserves the right to make changes without further notice to any board.
You are responsible for determining whether the board will be suitable for your intended use or application or will achieve your intended results. Prior to using or distributing any systems
that have been evaluated, designed or tested using the board, you agree to test and validate your design to confirm the functionality for your application. Any technical, applications or design
information or advice, quality characterization, reliability data or other services provided by ON Semiconductor shall not constitute any representation or warranty by ON Semiconductor,
and no additional obligations or liabilities shall arise from ON Semiconductor having provided such information or services.
The boards are not designed, intended, or authorized for use in life support systems, or any FDA Class 3 medical devices or medical devices with a similar or equivalent classification in
a foreign jurisdiction, or any devices intended for implantation in the human body. Should you purchase or use the board for any such unintended or unauthorized application, you shall
indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable
attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor
was negligent regarding the design or manufacture of the board.
This evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC,
CE or UL, and may not meet the technical requirements of these or other related directives.
FCC WARNING – This evaluation board/kit is intended for use for engineering development, demonstration, or evaluation purposes only and is not considered by ON Semiconductor to
be a finished end product fit for general consumer use. It may generate, use, or radiate radio frequency energy and has not been tested for compliance with the limits of computing devices
pursuant to part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment may cause interference with radio
communications, in which case the user shall be responsible, at its expense, to take whatever measures may be required to correct this interference.
ON Semiconductor does not convey any license under its patent rights nor the rights of others.
LIMITATIONS OF LIABILITY: ON Semiconductor shall not be liable for any special, consequential, incidental, indirect or punitive damages, including, but not limited to the costs of
requalification, delay, loss of profits or goodwill, arising out of or in connection with the board, even if ON Semiconductor is advised of the possibility of such damages. In no event shall
ON Semiconductor’s aggregate liability from any obligation arising out of or in connection with the board, under any theory of liability, exceed the purchase price paid for the board, if any.
For more information and documentation, please visit www.onsemi.com.
PUBLICATION ORDERING INFORMATION
TECHNICAL SUPPORT
North American Technical Support:
Voice Mail: 1 800−282−9855 Toll Free USA/Canada
Phone: [phone]
LITERATURE FULFILLMENT:
Email Requests to: [email protected]
ON Semiconductor Website: www.onsemi.com
Europe, Middle East and Africa Technical Support:
Phone: [phone]
For additional information, please contact your local Sales Representative
◊