AN30 [NIDEC]
6-Channel LED Driver;
| 型号： | AN30 |
| 厂家： | 
NIDEC COMPONENTS |
| 描述： | 6-Channel LED Driver |
| 文件： | 总7页 (文件大小：397K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Application Note 30
W-5626DB1 Evaluation/Demo Board for W-5626
6-Channel LED Driver
Denisa Stefan, Applications Engineer
Cornel Rotaru, Applications Engineer
through the six LED outputs. Each LED channel can
be also turned off/on independently through the I2C
1. INTRODUCTION
This
document
describes
the
W-5626DB1
bus.
Detailed
descriptions
and
electrical
Evaluation/Demonstration Board for the COPAL
ELECTRONICS W-5626 6-Channel LED driver with
I2C interface. The functionality and major parameters
of the W-5626 can be evaluated with the
W-5626DB1 board.
characteristics are in the W-5626 data sheet.
2. W-5626EVAL1 BOARD
HARDWARE
The board contains the W-5626 in
a
typical
The W-5626 is a 6-channel charge pump that has
been designed to drive up to 6 LEDs connected in
parallel. The device can drive three groups of two
LEDs. Each group can be configured with
independent LED current of up to 32mA max per
channel through the I2C serial interface. The W-5626
is operating in either 1x mode (LDO), or 1.5x mode
and provides tightly matched regulated current
application circuit, driving 2 RGB LEDs or 6 white
LEDs. The W-5626 is controlled through the I2C
serial interface using an 8-bit microcontroller. The
user can chose to drive on/off any LEDs combination
or to set the desired LED current through a PC serial
interface. The board is powered from an attached 9V
battery. The block diagram of the board hardware
schematic is shown in Figure 1.
W-5626
Figure 1. W-5626DB1 Block Schematic
© 2006 NIDEC COPAL ELECTRONICS CORP.
Characteristics subject to change without notice
1
Doc. No. 6047 Rev. A
Application Note 30
of 3 groups LED output channels. As a result the 2
RGB LEDs will provide the colors mixing between
RED, GREEN and BLUE with different intensities.
This loop is executed as long as the board is
powered.
The W-5626 input voltage, VIN is supplied on board
from a fixed +5V or +3V voltage (internally provided)
or from an external voltage applied to the VEXT (T5)
pad. The voltage supplied at the VIN input of the
W-5626 device can be selected using the jumper
options for the K1 connector.
Note: To use as a stand-alone board, the J9
connector must have the jumper removed; otherwise,
the microcontroller does not start the routine of
controlling the W-5626 at power-on.
The board uses an 8-bit microcontroller, 8051 type.
The microcontroller provides the signals on the SCL,
SDA and EN lines to control the W-5626.
The user can connect, or disconnect the W-5626
outputs to the LEDs using the jumper options for J1,
J2, J3, J4, J5, J6 and J7 connectors. J1 to J7 header
pin connectors can be used to insert a current meter
to evaluate the programmed LED current on each
channel.
3.2. W-5626DB1 Board Controlled through
the PC Serial Interface
The user can set the desired LED current value for
each of W-5626 output channel connecting the
W-5626DB1 through a PC serial interface. The
W-5626DB1 software provides the user a very
friendly graphical interface (GUI) for sending all the
commands to drive on/off any LEDs configuration and
to program the LEDs current.
The board is powered when the “POWER” switch is
ON. The W-5626DB1 boards are populated with two
RGB LEDs (Everlight EL61-23RGBC).
The W-5626DB1 software requires the following
minimum system configuration:
The component placement, top side, for the
W-5626DB1 and the board picture are shown in
Figure 2.
Microsoft Windows 98SE or above
100K of available hard disc space
Serial Interface Port
The detailed schematic and the list of components for
the W-5626DB1 are shown in the Appendix attached
in the end of this document.
The software is available on the W-5626DB1
software distribution CD-ROM.
3. BOARD OPERATION
3.1. Stand-alone Board
The W-5626DB1 software is an executable program
(“W-5626DB.exe”) which can be run from CD.
The board can be also used as a demonstration board
without connection to the PC interface. As a stand-
alone board, when the POWER switch is turned ON,
the microcontroller starts executing a routine that
sequentially sets different LED current values for each
Figure 2. W-5626DB1 Component Placement – Top Side
Doc. No. 6047 Rev. A
2
© 2006 NIDEC COPAL ELECTRONICS CORP.
Characteristics subject to change without notice
Application Note 30
f) When the program starts, the board will be in
the disabled state. Press the “ENABLE”
button and the W-5626 will be enabled. After
setting the EN input high, the user can write
into the Register_S to activate the
corresponding LED output channels. Figure 4
shows all the LED channels active. The
current for each channel is set at the minimum
value (=0.5mA).
The following steps should be followed to control the
W-5626DB1 demo board from the PC:
a) Connect the W-5626DB1 board to the PC
serial port through
a
cable with 9-pin
connectors, extender type. (For a limited
quantity the connection cable is provided.)
b) Connect a jumper shunt at J9 connector. This
allows the W-5626 to remain disabled
(EN =”0”) at power-on.
g) Using the W-5626DB1 software the user can
access all the internal registers of the
W-5626:
c) Power the W-5626DB1 board: Turn the
“POWER” switch ON. (The board should be
powered when you start the program;
otherwise an error message will be
displayed).
-
-
-
-
Register A: set the LED current for group A
(LEDA1, LEDA2) – associated with Red
from RGB LEDs
Register B: set the LED current for group B
(LEDB1, LEDB2) – associated with Green
from RGB LEDs
d) Run the “W-5626DB.exe” program from the
directory where the software was installed.
e) The W-5626 Demo Board user interface
window opens (Figure 3).
Register C: set the LED current for
group C (LEDC1, LEDC2) – associated
with Blue from RGB LEDs
Register S: controls the ON/OFF state of
each LED channel independently.
Figure 3. W-5626DB1 Software Interface Window (start window)
© 2006 NIDEC COPAL ELECTRONICS CORP.
Characteristics subject to change without notice
3
Doc. No. 6047 Rev. A
Application Note 30
The user can set the current for any group, writing the
associated register with the desired value. The current
can be set between 0.5mA and 32mA. These 64 steps
corresponds to the binary registers values of
XX000000 to XX111111. The user can change the
LED current value writing the corresponding binary
value in the associated Register (A, B or C). Every
register has associated “Write” and “Read” buttons to
write and respectively read data. The current value
can be also changed moving the cursor or/and
pressing the arrows buttons on the slider associated
to each register.
As an example, Figure 5 shows all the channels
enabled and the LED currents set to 15mA
(Group A – Red), 30mA (Group B – Green) and 3mA
(Group C – Blue).
Figure 4. W-5626DB1 with all channels enabled and LED currents set to min value
Figure 5. W-5626DB1 Board sets LED current independently for each LED group
Doc. No. 6047 Rev. A
4
© 2006 NIDEC COPAL ELECTRONICS CORP.
Characteristics subject to change without notice
Application Note 30
4. APPENDIX
The detailed board schematics and the list of components are shown in Figure 6 and Table 1.
Figure 6. W-5626DB1 Board Schematic
© 2006 NIDEC COPAL ELECTRONICS CORP.
Characteristics subject to change without notice
5
Doc. No. 6047 Rev. A
Application Note 30
Table 1. W-5626DB1 Board List of Components
Name
Manufacturer
Description
Part Number
Units
U1
COPAL
6-Channel LED Driver with I2C
W-5626HS4
1
ELECTRONICS interface, QFN16
U2
U3
U4
U5
Philips
8- bit flash microcontroller
P89LPC922FDH
1
1
1
1
4
7
2
1
1
2
1
Semiconductor TSSOP20
Intersil
RS-232 Transmitter/receiver,
SOIC16 Narrow
ICL3232ECBN
National
Semiconductor DPAK
3V, 500mA Voltage Regulator,
LP8345CDT-3.3
National
Semiconductor SOT223
5V Voltage Regulator, 1A,
LM340MP-5.0
C1, C2, C3, C4,
C12
AVX
Ceramic Capacitor 1uF / 10V,
10%, X5R, Size 0603
0603ZD105KAT2A
0805ZC104KAT2A
12061A220JAT2A
TPSA106K010R1800
CRCW0805180KFKTA
CRCW08055K10FKTA
C5, C6, C7, C8, C9, AVX
C10, C11
Ceramic Capacitor 0.1uF / 10V,
10%, X7R, Size 0805
C13, C14
AVX
AVX
Dale
Dale
Dale
Ceramic Capacitor 22pF / 100V,
5% COG, Size 1206
C15
Tantalum 10uF / 10V, 10%, Low
ESR
R1
SMT Resistor 1/8W, 180Kohm,
1%, Size 0805
R2, R3
R4
SMT Resistor 1/8W, 5K1, 1%,
Size 0805
SMT Resistor 1/8W, 22Kohm, 1%, CRCW080522KFKTA
Size 0805
D1 to D6
D7, D8
Nichia
White LED – Not Soldered
RGB LED, SMD
NSCW100
6
2
8
Everlight
MMM
EL61-23RGBC
2302-6211TG
J1 to J7. J9
2-pin Header Connector, 0.1",
Single Strip
J8
MMM
MMM
4-pin Header Connector, 0.1",
Single Strip
23046211TG
2308-62221TG
1
1
K1
6-pin Header Connector, 0.1",
Double Strip
K3
X1
ITT Cannon
Vishay
Slide switch
L102-01-1-MS-02-Q2
XT9SNLANA11M0592
2JM-G
1
1
9
Crystal 11.0592 MHz
Jumper Shunts
Specialty
Electronics
PP1
ITT Cannon
Mil-Max
D-Sub-Plug 9-Pole Solder Pin
Pin Receptacle
DE-9P
1
6
1
T1 to T6
BTH
#0149-0-15-01-30-14-04-0
BHR1294
Keystone
Battery Holder 1x 9V
Doc. No. 6047 Rev. A
6
© 2006 NIDEC COPAL ELECTRONICS CORP.
Characteristics subject to change without notice
REVISION HISTORY
Date
Rev.
Reason
03/17/2006
A
Initial Issue
NIDEC COPAL ELECTRONICS CORP. MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
NIDEC COPAL ELECTRONICS CORP. products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or
other applications intended to support or sustain life, or for any other application in which the failure of the NIDEC COPAL ELECTRONICS CORP. product could create a
situation where personal injury or death may occur.
NIDEC COPAL ELECTRONICS CORP. reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets
labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
NIDEC COPAL ELECTRONICS CORP. advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate
typical semiconductor applications and may not be complete.
NIDEC COPAL ELECTRONICS CORP.
Japan Head Office
Nishi-Shinjuku, Kimuraya Bldg.,
7-5-25 Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023
Phone: +81-3-3364-7055
Fax: +81-3-3364-7098
Document No:
Revision:
Issue date:
6047
A
03/17/06
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