Introduction
The STREF-SCS001V1 reference design lets you create a USB Type-C connector quickly and easily in order to power any
application up to 100 W (20 V, 5 A).
The status LED indicates the operating status of the STUSB4500 and USB PD port.
The USB PD port is pre-configured with the following default voltage values:
• PDO1: 5 V / 1.5A
• PDO2: 15 V / 1.5A
• PDO3: 20 V / 1.0A
Figure 1. STREF-SCS001V1 board photo
Fast and easy migration from DC barrel to Type-C
UM2533
User manual
UM2533 - Rev 1 - January 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
1Functional diagram
Figure 2. STREF-SCS001V1 functional diagram
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Functional diagram
UM2533 - Rev 1 page 2/15
2Getting started
The Type-C port is managed by the STUSB4500 in fully autonomous mode. When a connection is detected, the
load device (VSNK) is connected to VBUS power by the PMOS controlled by the STUSB4500 device.
When attached to a Type-C / Power Delivery source, the STUSB4500 negotiates voltage according to the
following priority list:
• 20 V / 1.0 A (PDO3 : preferred)
• 15 V / 1.5 A (PDO2)
• 5 V / 1.5 A (PDO1 : default)
A status LED indicates the voltage present on the VSNK:
• Light blue = 5 V
• Pink = PDO2 / 15 V
• Bright blue = 20 V
UM2533
Getting started
UM2533 - Rev 1 page 3/15
3Schematic diagram
Figure 3. STREF-SCS001V1 schematic
B3 21
1µF
VSNK
Tx-2
Disch
6
2
C1
CC1
STUSB4500
Addr0
A5
Vbus
Rx-1
D11
100
VReg_2V7
ESDA25P35
B12
U1
CC1
VCONN
Disch
Vsnk
Vbus
CC1
R1
1k
B10
Rx+1
D+1
TP3
T1
24
22k
9
CC2
B4
CC2
TP1
SCL
4
1
Tx+1
TP10
B2
R10
Tx+2
A6
TYPE C
J1
D-1
B8
C2
B7
CC2
22
D-2
VSYS
VDD
1k
100nF
B6
A2
Power_OK3
15
GPIO
12
A7
USB 3.1
CC2DB
R12
R11
Rx+2
B9
ESDA25W
ESDA25P35
D50
Sbu2
TP14
Standalone USB PD controller
with SINK auto-run mode
CC1DB
18
Sbu1
SCL
8
100k
R20
22k
A10
GND
A1
SDA
Vbus
1µF
Vsnk
B5
C50
CC2
B11
SDA
Vbus
A8
CC2
Tx-1
A12
2V7
VBUS_VS_Disch
19
ALERT#
C12
D1
R21
LD20
22k
13 Addr1
GND
Rx-2
GPIO
Power_PDO3
Power_PDO2
A_B_Side
SCL
Attach
SDA
ExpPAD
3
Power_OK2
17
A_B_Side
75
Vbus
Alert#
A3
TP13
CC1
A11
2V7
GND
GND
10
TP12
11
Attach
14
TP2
VReg_1V2
B1
GND
Reset
TP4
0
TP11
16
VBus_EN_SNK
20
A9
R2
A4
D+2
STL6P3LLH6
CC1
J10
Vbus
4.7µF
23
UM2533
Schematic diagram
UM2533 - Rev 1 page 4/15
4Bill of material
Item Q.ty Ref. Value Package Manufacturer Order code
1 2 C1, C2 1µF Capacitor 1µF X5R
6V3 20% 0402 Würth Elektronik 885012105006
2 1 C12 100nF
Capacitor 100nF
X5R 25V 20%
0402
Würth Elektronik 885012105018
3 1 C50 4.7µF
Capacitor 4.7µF
X7R 25V 20%
0805
Würth Elektronik 885012107018
4 1 D1 25V TRANSIL
SOT323
Dual Transil Array
For ESD Protection
in SOT323 Vbr =
25V
ST ESDA25W
5 2 D11, D50 22V
High power
transient voltage
suppressor Vbr =
24.6
ST ESDA25P35-1U1M
6 1 J1
USB 3.1 Type C
Receptacle
Horizontal THR
WR-COM 1.6mm
PCB thickness
Würth Elektronik 632723300011
7 1 J10
2 way PCB vertical
mount SCREW
terminal, 2.54mm
Würth Elektronik 691210910002
8 1 LD20 RGB Led 1.6 x 1.6
mm Diffused Würth Elektronik 150066M153000
9 2 R1, R2 1k ±5% 0603 SMD resistor
10 1 R10 100k ±5% 0402 SMD resistor
11 3 R11, R20, R21 22k ±5% 0402 SMD resistor
12 1 R12 100 ±5% 0402 SMD resistor
13 1 T1 STL6P3LLH6
P-channel 30 V,
0.024 Ω typ., 6 A
STripFET H6
Power MOSFET in
a PowerFLAT 3.3 x
3.3 package
ST STL6P3LLH6
14 1 U1 STUSB4500
Standalone USB
PD controller with
SINK auto-run
mode in QFN24
4x4mm
ST STUSB4500QTR
UM2533
Bill of material
UM2533 - Rev 1 page 5/15
5Board layout
Figure 4. STREF-SCS001V1: Dimensions
Figure 5. STREF-SCS001V1: Drill guide
Figure 6. STREF-SCS001V1: Top layer
Figure 7. STREF-SCS001V1: Bottom layer
UM2533
Board layout
UM2533 - Rev 1 page 6/15
Figure 8. STREF-SCS001V1: Top silkscreen
Figure 9. STREF-SCS001V1: Bottom silkscreen
Figure 10. STREF-SCS001V1: Top solder resist
Figure 11. STREF-SCS001V1: Bottom solder resist
Figure 12. STREF-SCS001V1: Top solder paste
UM2533
Board layout
UM2533 - Rev 1 page 7/15
Figure 13. STREF-SCS001V1: Bottom solder paste
Figure 14. STREF-SCS001V1: Top assembly
Figure 15. STREF-SCS001V1: Bottom assembly
Figure 16. STREF-SCS001V1: Top assembly (composite)
Figure 17. STREF-SCS001V1: Bottom assembly (composite)
UM2533
Board layout
UM2533 - Rev 1 page 8/15
5.1 Layout constraints
The VBUS connection to the PMOS Source must be as direct as possible. Use a wide track or routing plane and
place the clamping diode (TVS) and input capacitor on this track (no stub or distant connection).
Similarly, the VSNK connection from the PMOS Drain must be as direct as possible. Use a wide track or routing
plane and place the clamping diode (TVS) and output capacitor on this track (no stub or distant connection).
The ground path must have the lowest possible resistance.
The STSUB4500 decoupling capacitors must be placed close to the 1V2 and 2V7 pads. You should not use these
voltages sources for other purposes.
Protection diodes (such as the ESDA25W) should be placed on the CC1 and CC2 lines. You should have a direct
connection from the Type-C connector pin to the diode pad, and a direct connection from diode pad to the
STUSB4500 pad.
UM2533
Layout constraints
UM2533 - Rev 1 page 9/15
6Board customization
The STUSB4500 has embedded Non-Volatile Memory (NVM) for off-line parameter storage (such as PDO
values). This memory can be set via the I2C interface using STSW-STUSB002 software and an NUCLEO-
F072RB board. The PADs for I2C connection are available on the bottom of the board. Solder wires between
these pads and the Nucleo board:
• GND to Nucleo CN10 pin 9
• SCL to Nucleo CN10 pin 3
• SDA to Nucleo CN10 pin 5
Please refer to STSW-STUSB002 documentation for further details.
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Board customization
UM2533 - Rev 1 page 10/15
Revision history
Table 1. Document revision history
Date Version Changes
08-Jan-2019 1 Initial release.
UM2533
UM2533 - Rev 1 page 11/15
Contents
1Functional diagram ................................................................2
2Getting started ....................................................................3
3Schematic diagram ................................................................4
4Bill of material .....................................................................5
5Board layout.......................................................................6
5.1 Layout constraints ..............................................................8
6Board customization..............................................................10
Revision history .......................................................................11
Contents ..............................................................................12
List of tables ..........................................................................13
List of figures..........................................................................14
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Contents
UM2533 - Rev 1 page 12/15
List of figures
Figure 1. STREF-SCS001V1 board photo ........................................................1
Figure 2. STREF-SCS001V1 functional diagram....................................................2
Figure 3. STREF-SCS001V1 schematic .........................................................4
Figure 4. STREF-SCS001V1: Dimensions ........................................................6
Figure 5. STREF-SCS001V1: Drill guide .........................................................6
Figure 6. STREF-SCS001V1: Top layer..........................................................6
Figure 7. STREF-SCS001V1: Bottom layer .......................................................6
Figure 8. STREF-SCS001V1: Top silkscreen ......................................................7
Figure 9. STREF-SCS001V1: Bottom silkscreen....................................................7
Figure 10. STREF-SCS001V1: Top solder resist ....................................................7
Figure 11. STREF-SCS001V1: Bottom solder resist ..................................................7
Figure 12. STREF-SCS001V1: Top solder paste ....................................................7
Figure 13. STREF-SCS001V1: Bottom solder paste ..................................................8
Figure 14. STREF-SCS001V1: Top assembly ......................................................8
Figure 15. STREF-SCS001V1: Bottom assembly ....................................................8
Figure 16. STREF-SCS001V1: Top assembly (composite)..............................................8
Figure 17. STREF-SCS001V1: Bottom assembly (composite) ...........................................8
UM2533
List of figures
UM2533 - Rev 1 page 14/15
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