December 2016
DocID029773 Rev 1
1/5
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X-NUCLEO-LED16A1
16 channel LED driver expansion board based on LED1642GW
for STM32 Nucleo
Data brief
Features
16 constant current output channels
Output current: from 3 mA to 40 mA
20 V current generator rated voltage
Provision for cascading multiple expansion
boards
Current adjustment:
7-bit global current gain adjustment in
two ranges
Current programmable through external
resistor
12/16-bit PWM grayscale brightness
control
Selectable LED Bus voltage supply
USB
Vexternal
Error detection
Open LED
Shorted LED
Thermal shutdown
Compatible with STM32 Nucleo board
Equipped with Arduino™ UNO R3 connector
RoHS compliant
Description
The X-NUCLEO-LED16A1 is an STM32 Nucleo
expansion board designed to provide an
application for the 16 channel LED driver
LED1642GW. Multiple drivers can also be
cascaded by coupling X-NUCLEO-LED16A1
expansion boards.
Depending upon the end application, RGB or
single color LEDs can be connected to the board.
Separate brightness control is possible for each
channel.
It is compatible with the STM32 Nucleo board
family and equipped the Arduino™ UNO R3
connector layout.
Schematic diagrams
2/5
DocID029773 Rev 1
1 Schematic diagrams
Figure 1: X-NUCLEO-LED16A1 circuit schematic (1 of 2)
GND
GND
+3V3
+3V3
GND
LED 1-K
LED 2-K
LED 3-K
LED 4-K
LED 5-K
LED 6-K
LED 7-K
LED 8-K LED 9-K
LED 10-K
LED 11-K
LED 12-K
LED 13-K
LED 14-K
LED 15-K
LED 16-K
+5V
GND
FROM MCU SDI
SDI SDO
SCK
+3V3
LE PWCLK
+5V
+5V
+3V3
GND
FROM MCU SDI
SDI
DAISY CHAIN SDI-SDO
TO MCU SDO
SDO
DAISY CHAIN SDO-SDI
TO MCU SDO
FROM MCU SDI
SCK
SCK
GND
LED 1-K
LED 2-K
LED 3-K
LED 4-K
LED 5-K
LED 6-K
LED 7-K
LED 8-K
LED 9-K
LED 10-K
LED 11-K
LED 12-K
LED 13-K
LED 14-K
LED 15-K
LED 16-K
GND
+3V3
TO MCU SDO
LE
LE
LE
LE
PWCLK
PWCLK
LED CONTROL
LED CONTROL
+3V3
LED CONTROL
00
0
0
0
0
0
0
IndicationLED's
LED Rail Voltage Connector
ARDUINO UNO R3 Connectors
NC
IOREF
RESET
+3V3
+5V
GND
GND
VIN
A0
A1
A2
A3
A4
A5
D7
D6
D5
D4
D3
D2
D1
D0
D15
D14
GND
SCK/D13
MISO/D12
MOSI/D11
D10
D9
D8
VDD
ST morpho Connectors
LED Driver LED Strip Header
1:2 +5V USB
2:3 External Voltage
Daisy Chain Select Connectors
NORMAL OPERATION J2:
1:2 SDI SIGNAL FROM MCU
DAISY CHAIN J2:
2:3 SDI SIGNAL FROM SDO
NORMAL OPERATION J3:
1:2 SDO SIGNAL TO MCU
DAISY CHAIN J3:
2:3 SDO SIGNAL TO SDI
FAULT
J3
CON3
J3
CON3
1
2
3
R30 0ER30 0E
R33 0E
R33 0E
CN6CN6
1
2
3
4
5
6
7
8
C3
100nF
C3
100nF
CN9CN9
1
2
3
4
5
6
7
8
R22 15E
R22 15E
C2
10uF
C2
10uF
J1
CON16
J1
CON16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
R27 DNM
R27 DNM
R21 15E
R21 15E
0R
R2
0R
R2
R39 0E
R39 0E
R24 0E
R24 0E
R20 15E
R20 15E
R38 0E
R38 0E
D2
GREEN LED
D2
GREEN LED
R25 0E
R25 0E
R7 33E
R7 33E
R3
560E
R3
560E
R19 33E
R19 33E
C4
10uF
C4
10uF
R8 15E
R8 15E
R18 15E
R18 15E
R4
470E
R4
470E
R17 15E
R17 15E
CN8CN8
1
2
3
4
5
6
D3
STPS1L30
D3
STPS1L30
CN1CN1
CN10CN10
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
R16 33E
R16 33E
R15 15E
R15 15E
CN7CN7
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
R23 0E
R23 0E
R1 11K
R1 11K
J2
CON3
J2
CON3
1
2
3
R10 33E
R10 33E
R35 0E
R35 0E
U1
LED1642GWXTTR (TSSOP24 exposed pad)
U1
LED1642GWXTTR (TSSOP24 exposed pad)
GND
1SDI
2CLK
3LE
4OUT0
5OUT1
6OUT2
7OUT3
8OUT4
9OUT5
10 OUT6
11 OUT7
12
OUT12 17
OUT13 18
OUT14 19
OUT15 20
PWCLK 21
SDO 22
R-EXT23
Vdd 24
OUT8 13
OUT9 14
OUT10 15
OUT11 16
EP
25
R26 0E
R26 0E
C1
100nF
C1
100nF
R36 0E
R36 0E
R9 15E
R9 15E
R5 0E
R5 0E
D1
RED LED
D1
RED LED
CN2CN2
R34 0E
R34 0E
CN4
LED Anode Connector
CN4
LED Anode Connector
J4
CON3
J4
CON3
12
3
R14 15E
R14 15E
CN3
I/P Connector
CN3
I/P Connector
1
2
CN11CN11
R31 DNM
R31 DNM
R13 33E
R13 33E
R37 0E
R37 0E
R12 15E
R12 15E
CN5CN5
1
2
3
4
5
6
7
8
9
10
R11 15E
R11 15E
GSPG2309160945SG
X-NUCLEO-LED16A1
Schematic diagrams
DocID029773 Rev 1
3/5
Figure 2: X-NUCLEO-LED16A1 circuit schematic (2 of 2)
LED RAIL VOLTAGE
LED1_B
LED1_R
LED1_G
LED1_R
LED1_G
LED1_B
LED2_R
LED2_G
LED2_B
LED3_R
LED3_G
LED3_B
LED4_R
LED4_G
LED4_B
LED5_R
LED5_G
LED5_B
LED RAIL VOLTAGE
LED2_B
LED2_R
LED2_G
LED RAIL VOLTAGE
LED3_B
LED3_R
LED3_G
LED RAIL VOLTAGE
LED4_B
LED4_R
LED4_G
LED RAIL VOLTAGE
LED5_B
LED5_R
LED5_G
LED RAIL VOLTAGE
RGB LED's
RGB LED 's CATHODE
FEMALE HEADER
LED RAIL VOLTAGE
D5
LED5
1
2
3
4
D3
LED3
1
2
3
4
CN5CON2
1
2
D1
LED1
1
2
3
4
D4
LED4
1
2
3
4
J5
CON16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
D2
LED2LED2
1
2
3
4
GSPG2309161015SG
Revision history
4/5
DocID029773 Rev 1
2 Revision history
Table 1: Document revision history
Date
Version
Changes
02-Dec-2016
1
Initial release.
X-NUCLEO-LED16A1
DocID029773 Rev 1
5/5
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