Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
1. Introduction
The MagI³C Multi Color 4 channel LED driver reference design demonstrates how four MagI³C LED Step Down High
Current Modules (172946001) can be used to control the intensity and color of 4 individual LED strings.
The controlling can be done via hardware or software. An App for IOS was developed to control the reference design
using Bluetooth. A user panel (1780051) was designed to adjust the intensity of each channel. The board can be used for
horticulture, mixing of different white color temperatures, mixing of RGBW LED combinations (Red, Green, Blue, White)
or just to change the intensity of one type of LED.
This board has a size of 115x115mm and four layers of copper for heat dissipation. The board includes an EMI filter in
order to comply with the limits of the EN55015 conducted lighting norm and the CISPR32 norm for radiated EMI (tested
with 1m output cable length) even while dimming the LED strings.
Figure 1. Multi Color Reference Design (Power Board)
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
2. Specifications
Electrical Specifications
Features
Input Voltage Range:
18V – 48V
Input Voltage Transients:
Max. 50V
Output Voltage Range:
0V – VIN
Output Current:
0mA – 450mA
4 Channel LED Driver (can be extended by connecting daughter
board)
1-26 LEDs with 1,8V each in series per channel (depending on
LED forward voltage)
Intensity of each channel can be adjusted individually (dimming
0-100%)
Color mixing with four channels and RGBW LEDs
Dimming by potentiometer, button or Bluetooth control
(2608011024000)
PWM dimming method - controlled by PIC16F1527
microcontroller
Dimming profiles and colors can be stored
LED Driver: MagI³C Power Module 172 946 001
Conducted and radiated EMI compliant (EN55015)
Good thermal behavior
3. Functional Description
App
User
panel
Power
Board
LED panel
Figure 2: Block Diagram
The reference design consists of three parts: the power board, a control unit and the LED panel. The control unit can be an
App for iOS from the App-Store named “WEIlluminate” or the user panel 1780051. The user panel allows for manipulation
of the PWM duty cycle using either the potentiometer or the digital buttons connected to the microcontroller. The power
board 1780050 converts the signals from the controlling unit to a PWM signal, which controls four independent channels
with an LED Step Down High Current Module (LDHM) on each channel. The four channels are built identically, each include
an input and output filter to comply to the EMI norm.
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
High Power LED String
COUT
1
VIN
2
LED-
LED+
LED+
Module
IFIX
CIN
3
7
DIM
ISET
PGND
EP
6
5
AGND
RIADJ
4
Figure 3: Typical LDHM Circuit Diagram
The LDHM (172946001) of the Würth Elektronik MagI³C Power Module Series is an LED driver based on a floating buck
regulator (see Figure 4). The module is able to deliver both constant and pulsed currents. The TO263 package integrates
the inductor, the free-wheeling diode and the regulator IC. It delivers an output current of up to 450mA at an output voltage
from 4,5V to 60V. The output voltage is limited by the input voltage of the module as the input voltage must be equal to or
greater than the desired output voltage for proper operation.
LED-
PGND
Rsense
CIN
COUT
controller
VIN
LED+
LED+
Floating buck
Figure 4: Floating Buck Topology
DNS005 V1.0
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Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
3.1 Dimming with the LED Driver module
The LDHM (172946001) supports fast Pulse-Width Modulation (PWM) dimming of LEDs. An external microcontroller
controls the dimming of the LED driver by supplying the PWM signal to the DIM pin of the LED driver. This signal activates
and deactivates the MOSFET delivering power to the output of the LED driver. In addition, the dim-frequency depends on
the contrast ratio (CR) of the PWM signal. The CR defines the maximum dim-steps.
The PWM dimming is based on the refresh rate of the human eye. Therefore the current through the LED is periodically
interrupted with a frequency of 100 Hz to 1 kHz at the same amplitude. The longer the LED is interrupted, the less bright is
the intensity of the LED for the human eye. Due to the limitations of the human eye, humans will not see the flickering if the
dimming frequency is above 200 Hz. For camera applications, the frequency should be higher than 1 kHz to ensure the
dimming frequency is unobservable.
The advantage of this dimming method is that there are rarely differences in brightness or in color. This is because the
magnitude of the current through the LED is constant during the on time of the dimming cycle. Especially in the lower
percentages of the dimming value, this advantage benefits most.
There are important design considerations which have been taken into account when using this reference design due to
the use of PWM-controlled dimming. The frequency of the PWM signal can cause electromagnetic interference by
resonating with other elements of the system and potentially result in the manifestation of piezoelectric effects in the MLCCs.
Additionally, the PWM signal must have a controllable duty cycle to allow for manipulation of the dimming behavior.
fDIM = 250Hz
16µs
Darker LED
fDIM = 250Hz
32µs
fDIM = 250Hz
48µs
Brighter LED
Figure 5: Dimming with the LDHM
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
The 1780050 reference design uses a PWM frequency of 250 Hz which is generated by a PIC16F1527 microcontroller.
The signal is directly connected from the microcontroller to the DIM pin of the LDHM. With an 8-bit contrast ratio, 255
different duty cycle steps are possible. With the 5k Ohm potentiometer on the user panel and the reference voltage of 3,3V
you can use an analog signal with an analog-digital converter to change the duty cycle from 0 to 100%. Otherwise, you can
also use the buttons to increase or decrease the duty cycle of the PWM signal. The duty cycle can be adjusted one time
every 10ms.
3.2 Concept description
The input voltage of the board is limited to 48V due to the fact that the most common supply voltages are 24V and 48V.
Since the total forward voltage of all LEDs per string limits the amount of LEDs, the input voltage needed to be as high as
possible. Jumpers can set the maximum output current to 300mA, 350mA or 450mA at 100% duty cycle.
The Bluetooth Smart 4.2 Modul BLE T&R (2608011024000) of Würth Elektronik needs an input voltage of 3,3V. Therefore,
the microcontroller is also chosen with the same input voltage. The LED driver has specific requirements when operating
at high input voltages so an alternative supply is implemented using the BQFN-41 module (171021501) to provide a 15V
input from the 48V supply line. This is particularly useful when less than six LEDs are connected to the output of the design.
This 15V output is stepped down to 3,3V by an LDO. Because the current of the microcontroller and of the Bluetooth module
is only about 25mA, the power losses are negligible.
In addition, the selection criteria for the microcontroller were a minimum of four hardware PWM-outputs, five A/D-converter
inputs, enough GPIOs to realize all the intended features and a UART-interface for Bluetooth communication. Therefore,
the PIC16F1527 from Microchip was chosen.
The four LED drivers are designed in accordance to the 172946001 evaluation board and data sheet. All channels are built
exactly the same way and the supply voltage can be selected between the input voltage and 15 V with a switch. The board
is split into three different parts. The first part is the supply section where the different input voltages are generated. In the
control part, the microcontroller programmed in C with the software MPLAB X IDE controls the color and intensity mixing
based on the different duty cycles of the four PWM signals. The third and main part is the power section with the four LED
drivers. The control units are provided on an external user panel board for ease of use. This panel can be connected by
ribbon cable and is an alternative to using the control app.
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
4x PWM
+3,3V
optional
Bluetooth
Module
+15V
VIn
4 Channel LED driver
With 4x MagI³C Module 172 946 001
VIN
MagI³C
Module
QFN-41
+15V
LDO
+3,3V
Microcontroller
+3,3V
Input
Up to 48V
+15V
User panel
Control signals
Figure 6: Multi Color Reference Design Power distribution concept and functional diagram
The input voltage is connected to the input pins of the four MagI³C LED drivers (172 946 001) and to the MagI³C QFN-41
Module. The QFN-41 (171021601) converts the input voltage to a fixed voltage of 15V. The input voltage can be changed
from VIn to 15V by using the onboard switch. The LDO generates 3,3V and supplies the Bluetooth Module (2608011024000),
the control units of the user panel and the PIC16F1527 microcontroller. The microcontroller can receive commands from
the user panel as control signals or from the Bluetooth app via UART which it uses to determine the behavior of the four
unique 250Hz PWM signals sent to each LED driver.
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
4. Description
4.1 Complete system: Power Board, User Panel and LED Panel
Figure 7: Complete System
4.2 Power Board
• 18-48VIn ; 1,8-Vin Vout ; up to 450mA
• LDHM LED Step Down High Current Module
172946001
• VDRM Variable Step Down Regulator Module
QFN-41 171021501
• PIC16F1527 Microcontroller
• Bluetooth 4.2 Smart Module (260811024000)
• Switch between VIn, Off and +15V
• Input and Output Filter
• Robust screw terminal for VIn and VOut
Figure 8: Power Board
The jumpers next to the LED drivers change the maximum output current for each channel. Jumper J9, J15, J20 and J27
will set the current to 300mA. With J10, J16, J21and J28 the current is limited to 350mA. The maximum output current of
450mA is set with the jumpers J11, J17, J22 and J29. Please note that you should only set one jumper per channel,
DNS005 V1.0
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Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
otherwise the output current will be different than the values indicated in this document. The connector “PWM” can be used
to connect a second power board, where only the LED driver power section and filters are mounted (no control units). All
voltages and signals are delivered by the connector (four PWM signals, Vin, +15V, +3,3V and GND).
4.3 User Panel
• Potentiometer for LCD contrast
• Possibility for an LCD to show dimming-
ratio per channel
• Switch between potentiometer or button
operation
• LED for indicating potentiometer or button
operation
• Potentiometer for LED dimming
• Buttons for LED dimming
Figure 9: User panel
4.4 Horticulture LED Panel (example)
No. of
LEDs
Photosynthetic
Photon Flux1
(µmol · s-1)
Photon Flux1
(µmol · s-1)
WL-SMDC
Deep Blue
450 nm
(150353DS74500)
6
13.84
14.16
WL-SMDC
Hyper Red
660 nm
(150353HS74500)
12
21.66
23.64
WL-SMDC
Far Red
730 nm
(150353FS74500)
4
0.52
7.16
WL-SMTC
Warm White
3000 K
(158353030)
2
2.92
3.42
Figure 10: Example of Horticulture LED Board
DNS005 V1.0
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Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
5. Electromagnetic Interference (EMI)
5.1 Conducted Electromagnetic Interference
The conducted EMI is measured at the input of the board. The limit for this reference design is the norm EN55032/CISPR32.
The measurement was done with a PWM duty cycle of 80%.
As you can see, the in the graph below, the measured interference is always minimum 20dBµV below the limit.
80
Conducted Emissions 1780050
VIN = 24V, ILOAD = 450mA
Average Quasi peak
70
Conducted Emissions [dBµV]
60
EN55032 Class B Quasi Peak limit
50
EN55032 Class B Average limit
40
30
20
10
0
-10
0.15
0.5
1
10
30
Frequency [MHz]
Figure 11: Conducted Emmisions 1780050
5.2 Radiated Electromagnetic Interference
The radiated EMI is measured in a Fully Anechoic Room (FAR) at 3m antenna distance. The limit for this reference design
is the norm EN55015 - “Limits and methods of measurement of radio disturbance characteristics of electrical lighting and
similar equipment”. The measurement was done with PWM a duty cycle of 80%.
In the graph below shows, that the result of the measurement is also always minimum 26dBµV/m lower than the limit.
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
70
Radiated Emissions 1780050 (3m Antenna Distance)
VIN = 24V, ILOAD = 450mA
Vertical
Horizontal
60
Radiated Emissions [dBµV/m]
50
EN55015 Class B limit
40
30
20
10
0
30
1000
100
Frequency [MHz]
Figure 12: Radiated Emission with 3m antenna distance
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
6. Getting started
6.1 With the User panel
First of all you need to connect the ribbon cable between the power board and the user panel. Use the connector “User
panel”, “J2” and the 24-pin ribbon cable. Afterwards, connect your LED load board to the four channels of the power board.
Set the Jumpers to the maximum output current you need. You can choose between 300mA, 350mA and 450mA.
Recommended is the typical current of 350mA. Please set all four switches to “Off” to avoid a flickering of the LEDs while
turning on. Set the switch on the User panel to the operation mode you want to use. If you use the potentiometers please
note, that the LEDs will directly take the set values after setting the voltage switches. Now you can connect the power
supply (between 18V and 48V) to the power board. Depending on the input voltage and the total forward voltage of the LED
strings per channel, the switches for the input voltages of the LED drivers need to be chosen accordingly. If you have less
than 6 LEDs, please set the switch to 15V. Otherwise, set the board to the supply input voltage. With the switch on the user
panel, you can choose if you want to dim using the potentiometer or the digital buttons. Every channel has its own
potentiometer/button. The last potentiometer/button limits the duty cycle of all channels simultaneously.
If you want to switch from use of potentiometers to buttons, the set value will be taken on. When switching from buttons to
potentiometer, the value of the potentiometers will be set directly.
6.2 With the Bluetooth App
When controlling the board using the app, you will not need to connect the user panel. If you don’t connect the app, the A/D
converter of the microcontroller will use a random value for the PWM when the Bluetooth is not connected. This can result
in noticeable flickering of the LEDs. Set the Jumpers to the maximum output current you need. You can choose between
300mA, 350mA and 450mA. Recommended is the typical current of 350mA. Now connect your LED load board to the four
channels of the power board. Please set all four switches to “Off” to avoid a flickering of the LEDs while turning on. Now
you can connect the power supply (between 18V and 48V). Depending on the input voltage and the total forward voltage
of the LED strings per channel, the switches for the input voltages of the LED drivers need to be chosen accordingly. If you
have less than six LEDs, please set the switch to 15V. Otherwise, set the switch to be directly powered by the supply input
voltage. When everything is working you can connect the “WEIlluminate” app with the Bluetooth module on the power
board. Click “Select Device” in the upper right corner of the app and connect it to the AMB2621 Module. Now you can adjust
the PWM duty cycle with the sliders in the app.
6.3 Important Notes
Please note that the LED panel will flash up for a few milliseconds (typically about 50ms) due to the
initialization of the microcontroller when turning on the power supply, if you do not set the switches to
“Off” before turning on.
Also please never look directly into the LEDs, this can cause irreparable damage to the eye due to the
brightness of the LEDs.
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
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Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
7. Schematic
The schematic has been divided into three parts. The LED driver part was printed on two pages for a better overview of its
complexity. The supply and microcontroller schematics are each printed on separate pages shown below.
The supply unit circuit begins with the input filter. After the input filter, the QFN-41 is placed with all its external components
from the data sheet. Note that the SW pins are all connected together. The under voltage lockout voltage divider for the
QFN-41 power module, realized with R3 and R6, is not placed. This option can be used, if a certain input voltage should
be present before turn on or to ensure safe turn off of the output voltage in the event of an input voltage dip. The resistors
R4 and R5 are used to adjust the output voltage to 15V and the switching frequency to 1MHz. The capacitor C2 enables
the soft start of the module.
CE2, C3 and C4 are the input capacitors and C5 and C6 are the output capacitors of the QFN-41 power module. The
minimum input voltage of the LED driver board is 18V to allow the 15V output voltage of the QFN-41 power module. The
maximum input voltage is 48V.
The linear regulator is connected directly at the output of the QFN-41 power module. The microcontroller has a 100nF
capacitor directly at each supply pin to avoid voltage spikes during operation. Furthermore, a Bluetooth Smart 4.2 module
as well as a 16-pin ribbon connector for a Liquid Crystal Display (LCD) are implemented for ease of configuration and
operation. A 24-pin ribbon connector allows the connection of the user panel to control the intensity. The 8-pin connector
J5 allows synchronization of the four parallel LED drivers. On this additional board, no external power supply or control unit
is needed as the supply voltages (Vin, 15V, 3.3V, GND), as well as the four PWM signals, are distributed via the 24-pin
ribbon connector. The programmer is connected to the microcontroller via a six-pin connector (Prog.).
To decouple the LED drivers from each other, a PI-filter consisting of a 2.2μH PD2 coil (7447732110) and an electrolytic
capacitor with 27μF (860040874001) is implemented at the input of each module. This provides damping of the noise and
ripple generated by the switching frequency of the other modules.
The rest of the wiring of the LED driver was taken directly from the data sheet, with the exception of a polymer capacitor
(875105945001) as an output capacitor. An output filter was also added, containing two chip bead ferrites with 1500Ohms
at 100MHz (742792097) to damp high frequency noise in both lines. Also, a 100nF (885012207128) capacitor for damping
high frequency voltages and a common mode choke (744226S) for low frequency noise damping is implemented.
L2
L1
VIN
VIN
LED+
LED+
LDHM
CE1
+
CE2
+
L4
COut
CIn
+
Dn
C3
Dn+1
GND
GND
LEDL3
Input Filter
Output Filter
LED-
Figure 13: Single output channel including EMI Filter
DNS005 V1.0
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Copyright © Würth Elektronik eiSos GmbH & Co. KG
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DNS005 V1.0
GND
Vin1
2
1
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
+15V
GND
1
C1
4.7uF
GND
GND
GND
+3V3
+15V
Vin
C8
0,33uF/25V
Vin1
Eingangsklemme
J1
GND
+3V3
+15V
Vin
+Vin
U2
GND
+Vout
2.5A, 2.2uH
L1
3
Vin
C7
100nF/25V
+3V3
+3V3
CE1
27uF/100V
GND
VIn
GND
C5
+15V
C6
SW
GND
GND
1
2
3
4
5
6
7
38
8
9
10
11
1
+15V
RSET INT
COMP
RCCOMP
AGND
AGND
SW
SW
SW
NC
NC
VOUT
VOUT
1
R4
178k
1
GND
1
R5
178k
IC1
INTSS
SS/TRK
EN/UVLO
VIN
BOOT
SW
SW
SW
SW
SW
PGND
PGND
29
28
27
26
25
41
24
23
22
21
20
19
GND
SW
GND
SS/TRK
EN/UVLO
Vin
C3
4.7uF/100V
GND
C4
4.7uF/100V
22nF/50V
C2
CE2
GND
R3
GND
R6
GND
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
Figure 14: Multi Color Reference Design Schematic power supply
Page 13/20
DNS005 V1.0
Vin
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
GND
+3V3
+15V
Vin
2
4
6
8
10
12
14
16
18
20
22
24
2
4
6
8
10
12
14
16
+15V
RS
E
D1
D3
D5
D7
GND
10k0
VPP/MCLR
+3V3
GND
ICSPDAT
ICSPCLK
LVP
R10
2
3
4
5
6
PWM_4
PWM_3
PWM_2
PWM_1
POTI_2
POTI_4
CH1_+
CH2_+
CH3_+
CH4_+
CH5_+
Switch
GND
GND
GND
GND
Prog.1 VPP/MCLR
61201621621
1
3
5
7
9
11
13
15
LCD
61202421621
1
3
5
7
9
11
13
15
17
19
21
23
User panel
GND
+3V3
GND
V0
RW
D0
D2
D4
D6
+15V
POTI_1
POTI_3
POTI_5
CH1_CH2_CH3_CH4_CH5_+3V3
+3V3
+15V
+15V
GND
+3V3
+15V
PWM_4
PWM_3
PWM_2
PWM_1
2
4
6
8
61200821621
1
3
5
7
PWM
BLE Update
J31 1 +3V3
2 SwDCLK
3 SwDIO
4 Reset
4 GND
GND 2
S5
3 Reset
Reset 1
PWM_4
PWM_3
PWM_2
PWM_1
Vin
+15V
+3V3
GND
J30
2
1
GND
Boot
Reset
1
2
3
4
5
6
VPP/MCLR 7
8
GND
9
+3V3 10
D7
11
D6
12
D5
13
D4
14
D3
15
D2
16
1
8
9
GND 2
SwDCLK 3
SwDIO4
Reset 5
Boot 6
+3V3 7
0R00
R27
2608011024000
RF
GND
GND
SWDCLK
P0.29/AIN5
SWDIO
P0.28/AIN4
P0.21/nRST P0.04/AIN2
P0.05/AIN3 RXM(P0.03)
VDD
TXM(P0.02)
P0.10/NFC2
P0.01/XL2
P0.09/NFC1
P0.00/XL1
Bluetooth
RE1
RE0
RG0
RG1
RG2
RG3
RG5/VPP/MLCR
RG4
GND
VDD
RF7
RF6
RF5
RF4
RF3
RF2
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
17 GND
16 WakeUp
15
14
13 TX1
12 RX1
11
10
R28
0R00
RB0
RB1
RB2
RB3
RB4
RB5
RB6
GND
RA6
RA7
VDD
RB7
RC5
RC4
RC3
RC2
RW
E
RS
+3V3
ICSPDAT
Switch
POTI_4
POTI_2
POTI_1
POTI_3
POTI_5
ICSPCLK
GND
U1
PIC16F1527
AV_DD
C9
R9
10R
C10
C11
4
3
C12
2
C13
1
GND
C14
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
Figure 15: Multi Color Reference Design Schematic microcontroller
Page 14/20
DNS005 V1.0
Vin
A
C
B
3
2
1
GND
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
A
C
B
3
2
1
GND
APEM 25000N
S2
GND
+15V
Vin
+15V
Vin
+15V
Vin
APEM 25000N
S1
GND
+15V
CE5
27uF/100V
CE3
27uF/100V
PWM_2
PWM_1
PWM_2
PWM_1
0.8A, 10uH
L3
0.8A, 10uH
L2
CE6
27uF/100V
CE4
27uF/100V
2
1
C20
2,2uF/100V
PWM_2 3
C17
2,2uF/100V
PWM_1 3
2
1
IC3
EP
4
ISET
AGND
PGND
IFIX
LED-
4
DIM
LED+
LED+
IC2
EP
ISET
AGND
PGND
IFIX
LED-
DIM
LED+
LED+
5
6
7
5
6
7
J15
J9
R16
3k5
1
2
2+
R12
3k5
1
2
1+
2-
C18
4.7uF
1-
C15
4.7uF
2
R17
3k
J161
2
R13
3k
J101
2
R14
2k33
R18
2k33
J171
1500O
L11
1500O
L9
2
J11 1
1500O
L8
1500O
L6
C19 3
0R00
R29
10 uH
4 L10
0R00
R8
0R00
R7
10 uH
4 L7
C16 3
0R00
R1
2
1
2
1
2
1
2
1
Ch.2
Ch.1
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
Figure 16: Multi Color Reference Design Schematic LED driver channel 1 and 2
Page 15/20
DNS005 V1.0
A
C
B
3
2
1
GND
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
A
C
B
3
2
1
GND
APEM 25000N
S4
GND
+15V
Vin
+15V
Vin
+15V
Vin
APEM 25000N
S3
GND
+15V
Vin
CE9
27uF/100V
CE7
27uF/100V
PWM_4
PWM_3
PWM_4
PWM_3
0.8A, 10uH
L5
0.8A, 10uH
L4
CE10
27uF/100V
CE8
27uF/100V
2
1
C26
2,2uF/100V
PWM_4 3
C23
2,2uF/100V
PWM_3 3
2
1
IC5
EP
4
ISET
AGND
PGND
IFIX
LED-
4
DIM
LED+
LED+
IC4
EP
ISET
AGND
PGND
IFIX
LED-
DIM
LED+
LED+
5
6
7
5
6
7
J27
J21
R24
3k5
1
2
4+
R20
3k5
1
2
3+
4-
C24
4.7uF
3-
C21
4.7uF
2
R25
3k
J281
2
R21
3k
J221
2
R22
2k33
R26
2k33
J291
1500O
L17
1500O
L15
2
J231
1500O
L14
1500O
L12
0R00
R32
0R00
R31
10 uH
C25 3
0R00
R33
10 uH
4 L16
C22 3
4 L13
0R00
R30
2
1
2
1
2
1
2
1
Ch.4
Ch.3
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
Figure 17: Multi Color Reference Design Schematic LED driver channel 3 and 4
Page 16/20
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
8. Assembly Drawing
Figure 18: Multi Color Reference Design Assembly Drawing Power Board
Figure 19: Multi Color Reference Design Assembly Drawing User panel
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
Page 17/20
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
9. Bill of Material Power Board
Reference
-, +, +3V3, +15V, 1, 2,
3, 4, GND, VIn
Bluetooth
C1, C15, C18, C21,
C24
C2
C3, C4
C5, C6
C7, C9, C10, C11,
C12, C13, C14
C8
C16, C19, C22, C25
C17, C20, C23, C26
CE1, CE2, CE3, CE4,
CE5, CE6, CE7, CE8,
CE9, CE10
IC1
Value
Package
not placed
Manufacturer
Order Code
Stelvio Kontek
3110325000500
4.2 BLE T&R
4.7uF/100V
6.3x7.7mm
Würth Elektronik
Würth Elektronik
2608011024000
875105945001
22nF/50V
4.7uF/100V
10uF/25V
100nF/25V
1206
1206
1210
0805
Würth Elektronik
TDK
Würth Elektronik
Würth Elektronik
885012208083
KTS101B475M55N0T00
885012209028
885012207072
0,33uF/25V
100nF/100V
2,2uF/100V
27uF/100V
0805
0805
1206
8x11.5mm
Würth Elektronik
Würth Elektronik
TDK
Würth Elektronik
885012207075
885012207128
C3216X7S2A225K160AB
860040874001
7-50 Vin, 2.5-15
Vout, 2.5 A
4,5-60 Vin, Iout,max
450mA
BQFN-41
Würth Elektronik
171021501
TO-263
Würth Elektronik
172946001
WR-TBL_5,0mm
Würth Elektronik
691502710002
24-pol.
16-pol.
6-pol.
8-pol.
2-pol.
Würth Elektronik
Würth Elektronik
Würth Elektronik
Würth Elektronik
Würth Elektronik
61202421621
61201621621
61300611121
61200821621
61300211121
2.5A, 2.2uH
0.8A, 10uH
1500Ω
4-pol.
4532
3521
0805
Würth Elektronik
Würth Elektronik
Würth Elektronik
Würth Elektronik
61300411121
744773022
7447732110
742792097
10 uH
0R
SMD
0805
Würth Elektronik
Vishay
744226S
CRCW08050000Z0EBC
R3, R6, R30, R31,
R32, R33, R1, R7, R8,
R29
R4, R5
R9
R10
R12, R16, R20, R24
R13, R17, R21, R25
R14, R18, R22, R26
S1, S2, S3, S4
S5
U1
U2
Pad1, Pad2, Pad3,
Pad4
PCB1
not placed, 0R
0805
Vishay
CRCW08050000Z0EBC
178k
10R
10k0
3k48
3k
2k32
0805
0805
0805
0805
0805
0805
3-pol.
6x6x5mm SMD
TQFP-64
SOT-223-4
Rubber Pad
Panasonic
Vishay
Vishay
Panasonic
Panasonic
Panasonic
APEM
Würth Elektronik
Microchip
Texas Instruments
3M
ERJ-6ENF1783V
CRCW080510R0FKEAC
CRCW0805-10K
ERJ-6ENF3481V
ERJ-6ENF3001V
ERJ-6ENF2321V
25139NAH
430152050826
PIC16F1527-I/PT
UA78M33CDCYR
SJ5076BLACK
115x115mm,
4 Layers
Würth Elektronik
L-1780050
Jumper
placed on J10, J16,
J22, J28
Würth Elektronik
60900213421
IC2, IC3, IC4, IC5
J1, Ch.1, Ch.2, Ch.3,
Ch.4
User panel
LCD
Prog.
PWM
J9, J10, J11, J15, J16,
J17, J21, J22, J23,
J27, J28, J29, J30
J31
L1
L2, L3, L4, L5
L6, L8, L9, L11, L12,
L14, L15, L17
L7, L10, L13, L16
R27, R28
DNS005 V1.0
PIC16F1527
3V3 500mA
1780050
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
Page 18/20
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
10. Bill of Material User Panel
Reference
+V, GND
C1
C2
D1, D2
J1
J2
J3
R1
R2, R3
R4, R5, R6, R7, R8
R9, R10, R11, R12,
R13, R14, R15, R16,
R17, R18
S1
S2, S3, S4, S5, S6,
S7, S8, S9, S10, S11
U1
R19, R20
Pad1, Pad2, Pad3,
Pad4
LCD Display Modul
with HD44780
controller
PCB1
DNS005 V1.0
Value
not placed
100nF/25V
0,33uF/25V
Red, 2V, 140°
10k
100R
5k
10k
5V, 500mA
Not placed
Can be placed on J1
Package
Manufacturer
Order Code
0805
0805
0805
16-pol
16-pol
24-pol
THT
0805
THT
0805
Stelvio Kontek
Würth Elektronik
Würth Elektronik
Würth Elektronik
Würth Elektronik
Würth Elektronik
Würth Elektronik
Bourns
Vishay
Bourns
Vishay
3110325000500
885012207072
885012207075
150080RS75000
61301611121
61201621621
61202421621
3386F-1-103LF
CRCW0805-100
PTV09A-4020F-B502
CRCW0805-10K
2-pol.
6x6x5mm SMD
APEM
Würth Elektronik
25136NAH
430152050826
SOT-223-4
Texas Instruments
uA78M05CDYR
Rubber Pad
3M
SJ5076BLACK
Würth Elektronik
L-1780051
1602
100x100mm,
2 Layers
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
Page 19/20
Reference Design Note
MagI3C Power Modules
DNS005 MagI3C Multi Color LED Driver
11. Important Notes
This Reference Design Note / Application Note is based on our knowledge and experience of typical requirements
concerning these areas. It serves as general guidance and should not be construed as a commitment for the suitability for
customer applications by Würth Elektronik eiSos GmbH & Co. KG. The information in the Application Note is subject to
change without notice. This document and parts thereof must not be reproduced or copied without written permission, and
contents thereof must not be imparted to a third party nor be used for any unauthorized purpose.
Würth Elektronik eiSos GmbH & Co. KG and its subsidiaries and affiliates (WE) are not liable for application assistance of
any kind. Customers may use WE’s assistance and product recommendations for their applications and design. The
responsibility for the applicability and use of WE Products in a particular customer design is always solely within the authority
of the customer. Due to this fact it is up to the customer to evaluate and investigate, where appropriate, and decide whether
the device with the specific product characteristics described in the product specification is valid and suitable for the
respective customer application or not.
The technical specifications are stated in the current data sheet of the products. Therefore the customers shall use the data
sheets and are cautioned to verify that data sheets are current. The current data sheets can be downloaded at www.we online.com. Customers shall strictly observe any product-specific notes, cautions and warnings. WE reserves the right to
make corrections, modifications, enhancements, improvements, and other changes to its products and services.
WE DOES NOT WARRANT OR REPRESENT THAT ANY LICENSE, EITHER EXPRESS OR IMPLIED, IS GRANTED
UNDER ANY PATENT RIGHT, COPYRIGHT, MASK WORK RIGHT, OR OTHER INTELLECTUAL PROPERTY RIGHT
RELATING TO ANY COMBINATION, MACHINE, OR PROCESS IN WHICH WE PRODUCTS OR SERVICES ARE USED.
INFORMATION PUBLISHED BY WE REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT
CONSTITUTE A LICENSE FROM WE TO USE SUCH PRODUCTS OR SERVICES OR A WARRANTY OR
ENDORSEMENT THEREOF.
WE products are not authorized for use in safety-critical applications, or where a failure of the product is reasonably
expected to cause severe personal injury or death. Moreover, WE products are neither designed nor intended for use in
areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control,
ship control), transportation signal, disaster prevention, medical, public information network etc. Customers shall inform WE
about the intent of such usage before design-in stage. In certain customer applications requiring a very high level of safety
and in which the malfunction or failure of an electronic component could endanger human life or health, customers must
ensure that they have all necessary expertise in the safety and regulatory ramifications of their applications. Customers
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning
their products and any use of WE products in such safety-critical applications, notwithstanding any applications-related
information or support that may be provided by WE. CUSTOMERS SHALL INDEMNIFY WE AGAINST ANY DAMAGES
ARISING OUT OF THE USE OF WE PRODUCTS IN SUCH SAFETY-CRITICAL APPLICATIONS.
USEFUL LINKS
CONTACT INFORMATION
Application Notes / Reference Design Notes
https://www.we-online.com/app-notes
Technical Support
powermodules@we-online.com
REDEXPERT Design Tool
https://www.we-online.com/redexpert
Würth Elektronik eiSos GmbH & CO. KG
Max-Eyth-Str. 1, 74638 Waldenburg
Germany
Toolbox
https://www.we-online.com/toolbox
Tel.: +49 7942 945 0
we-online.com
MagI3C Product Catalog
https://katalog.we-online.com/en/pm
DNS005 V1.0
Alexander Zeller – June 2019
Copyright © Würth Elektronik eiSos GmbH & Co. KG
Page 20/20
