ST STCC50x1 User manual

June 2013 DocID023275 Rev 1 1/17
UM1551
User manual
STCC50x1, STCC2540 demonstration board
Introduction
This demonstration board allows the easy measurement of STCC50x1 parameters and the
evaluation of all its functions and operating modes.
Note: The STCC2540 demonstration board is exactly the same, just assembled with the
STCC2540 instead of the STCC50x1 device. For details, please see Appendix B.
Features
USB 2.0 SDP or CDP data pass-through with S3 remote wakeup support or automatic
charging
Permanent USB 3.0 SuperSpeed data pass-through between input and output USB
connector
CDP mode with charging indication after CDP negotiation
DCP modes with charging indication (BC1.2 mode, divider mode, auto-detect mode)
Attach and charging/end-of-charging detection and indication
Resistor-programmable precise current limiter and short-circuit protection
Figure 1. STCC50x1 demonstration board
www.st.com

Contents UM1551
2/17 DocID023275 Rev 1
Contents
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Quick guide and default configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Settings and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Variable resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Jumper selectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STCC2540 emulation using the STCC50x1 device . . . . . . . . . . . . . . . . . . . . . . . . 6
Schematics diagram description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Auxiliary and indication circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Appendix A Schematic, BOM, and layers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Appendix B STCC2540 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Quick guide and default configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Jumper and selector settings for default configuration. . . . . . . . . . . . . . . . . . . . . . 14
Board settings and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Variable resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Jumper selectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

DocID023275 Rev 1 3/17
UM1551 Description
17
Description
Quick guide and default configuration
By default, the board is powered from a USB host (notebook, PC, docking station, etc.)
through the J2 USB connector. No external power supply is necessary.
In this mode, evaluation of all STCC50x1 device features is possible with the following
limitation:
Maximum charging current is limited by the USB host capabilities (typically 500 mA
to 2000 mA).
Jumper and selector settings for default configuration
J5: ON (closed)
SW6: VEXT (1 - 2)
Settings and connections
Variable resistors
Resistor R18
This resistor adjusts the VLDO voltage to verify proper functionality of the attach detector for
the whole VDD operating range. The equation is as follows:
Equation 1
Minimum adjustable voltage is approx. 1.7 V, maximum voltage is close to VEXT
. The VLDO
increases in a counter-clockwise direction.
For externally set VDD voltage, the jumper selector SW6 can be placed in the VEXT position,
connecting VEXT directly to VDD.
Resistor R26
This resistor adjusts the current limiter threshold according to Equation 2:
Equation 2
Minimum current is approx. 400 mA, maximum current is approx. 2700 mA. The current limit
increases in a clockwise direction.
For minimum current, the accuracy is not defined. The host/power supply capability may be
at least equal to the current limiter threshold set by R26.
VLDO
1,2 R18 6,2 15++
15
----------------------------------------------------- Vk=
ISC 48000
R26 18+
------------------------mA k=

Description UM1551
4/17 DocID023275 Rev 1
Jumper selectors
SW2 to SW4: operating mode (CTLx)
1 - 2 = 1, 2 - 3 = 0 (see Table 1)
SW5: power and data switch enable (EN)
1 - 2 = 1, 2 - 3 = 0
1 = enabled, 0 = disabled, VOUT discharge when ATTACH_EN = 0 (see Ta ble 2)
SW1: attach detector enable (ATTACH_EN)
1 - 2 = 1, 2 - 3 = 0
1 = enabled if EN = 0 (see Table 2), 0 = disabled
The control inputs (CTL1 - CTL3, EN, ATTACH_EN) are also available on control connector
J6. If this connector is used, the jumper caps from SW1 to SW5 must be removed.
Table 1. CTLx truth table(1)
1. The VOUT discharge pulse is also intentionally omitted for transitions 010 <-> 011, 110 <-> 011.
SW4
(CTL1)
SW3
(CTL2)
SW2
(CTL3) Mode Note
0 0 0 Power and data switch turned off Continuous VOUT discharge
110S0SDP No VOUT discharge pulse on
transition 110 <-> 010
0 1 0 S3 SDP with remote wakeup
1 1 1 S0 CDP
No VOUT discharge pulse on
transition 111 <-> 011 for low
speed devices
011
S3 CDP with remote wakeup for low
speed devices / DCP auto-detect for
full-speed and high-speed devices
Automatic switch to DCP
auto-detect mode also after
a device detach
0 0 1 DCP auto-detect
1 0 0 DCP BC1.2
1 0 1 DCP divider
Table 2. EN and ATTACH_EN truth table
SW5 (EN) SW1 (ATTACH_EN) Attach detector Continuous VOUT
discharge
0 0 Disabled Yes
0 1 Enabled No
1 X Disabled No

DocID023275 Rev 1 5/17
UM1551 Description
17
SW6: attach detector power supply (VDD) selector
1 - 2 = VEXT (J4), 2 - 3 = VLDO
Default position: VEXT
This selector allows to power the VDD either from onboard adjustable LDO or from external
voltage connected to J4 (VEXT).
If the VDD is powered from VEXT (no matter if directly or using onboard LDO), there should
be an external pull-up resistor to VDD connected to the CHARGING/ATTACH output to
ensure its proper function in the case of VIN turned off.
Jumper
J5: VBUS to VEXT connection
Default position: ON
Set to OFF if the attach detector may be powered from an independent power supply.
Connectors
Connector J2
USB 3.0 (USB 2.0 compatible) standard A male (plug) connector to connect the
demonstration board to the host (PC, notebook, docking station, etc.) USB port either
directly or using any standard A male to standard A female USB expansion cable.
Connector J3
USB 3.0 (USB 2.0 compatible) standard A female (receptacle) connector to connect the
peripheral device to the demonstration board.
Connector J4
Screw terminal to connect the demonstration board to high current power supply
(4.75 - 5.25 V, 2.8 A or more) to evaluate highest current DCP charging modes
(e.g. universal charger mode).
Warning: To prevent damage to the USB host and/or the external power
supply, do NOT power the demonstration board from the USB
host (through J2) and from external supply (through J4)
simultaneously.
Connector J6
Control connector (CANON15) to set the STCC50x1 inputs remotely and also to remotely
sense the status of its indication outputs.
If this connector is used, the jumper caps from SW1 to SW5 must be removed to allow
remote setting of STCC50x1 inputs. No pull-up/pull-down resistors are provided on
ATTACH_EN and CTLx inputs!
On EN, an internal pull-down resistor of 250 ktyp. is provided in the STCC50x1 device.

Description UM1551
6/17 DocID023275 Rev 1
STCC2540 emulation using the STCC50x1 device
This STCC50x1 device can be used also for evaluating the performance of the STCC2540
device using following settings:
J5 = ON (VIN and VDD are powered from the same supply)
SW6 = VEXT (VDD = VIN)
SW1 = GND (attach detector disabled)
In this configuration the STCC50x1 device is functionally equivalent with the STCC2540
device with following remarks:
There is an internal 250 kpull-down resistor on EN input, which is not present in the
STCC2540 device.
The current consumption is slightly higher (because of the attach detector and EN pull-
down resistor).
For the STCC5011 device, the DCP divider mode is set to 1 A instead of 2 A.
Schematics diagram description
Power supply
The core of the board is the USB charging controller STCC50x1. Its VIN is powered from
either VBUS (power from USB host) through the J2 connector or from VEXT (external 5 V
supply) through J4. To evaluate the performance of dedicated charger mode, a direct supply
path from VEXT to VIN can be created by jumper J5.
To evaluate the performance of the STCC50x1 attach detector within the whole VDD supply
voltage range, an LDO U4 in typical configuration is used. Its output voltage, VLDO, can be
adjusted by R18 in the range of approx. 1.7 V to approx. 5 V.
For higher or external (independent on VIN) VDD, the jumper selector SW6 may be set to the
VEXT position, the jumper J5 may be open (off) and the requested VDD can then be
connected to J4 (VEXT).
Table 3. J6 pinout
Pin number Connection Pin number Connection
1 ATTACH_EN 9 VIN
2 EN (internal pull-down resistor) 10 VIN
3CTL111V
IN
4CTL212GND
5CTL313GND
6GND14V
DD
7 CHARGING/ATTACH 15 VDD
8FAULTShield GND

DocID023275 Rev 1 7/17
UM1551 Description
17
If the VDD is powered from VEXT (no matter if directly or using onboard LDO), there should
be an external pull-up resistor to VDD connected to the CHARGING/ATTACH output to
ensure its proper function in the case of VIN turned off.
Auxiliary and indication circuits
Test points
All the important signals are available on test points.
The DP_IN, DM_IN, DP_OUT and DM_OUT signals are isolated from the high speed USB
bus by 10 kresistors. The purpose of these test points is to verify DC values and various
detection/negotiation processes only, not to evaluate the AC performance of the STCC50x1
device.
The AC performance of the USB data switch (eye-diagram tests for instance) can, of
course, be evaluated using the demonstration board USB connectors J2 and J3 when the
board is configured to SDP mode (CTLx = 110, EN = 1) and nothing connected to TP14 -
TP17.
The sensing test points TP18 and TP19 allow measurements of RDS (on) using a Kelvin
connection.
LEDs
The board is equipped with indication LEDs to allow easy visual verification of these vital
signals: VIN, FAULT, CHARGING/ATTACH, VOUT
.
The VOUT LED is isolated from the VOUT line by Q1 to prevent false attach detection caused
by LED current.
Decoupling components
The capacitors C1, C2, C3 and C4 are recommended decoupling components for the
STCC50x1 device. They are recommended values, types and placements and can be used
as a guide for application design.

Schematic, BOM, and layers UM1551 8/17 DocID023275 Rev 1
Appendix A Schematic, BOM, and layers
Figure 2. Schematic of STCC50x1 demonstration board
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UM1551 Schematic, BOM, and layers
DocID023275 Rev 1 9/17
Table 4. Bill of material
Qty. Component Device Value Parts Manufacturer/supplier
5 Ceramic capacitor M/16V/X7R/0805(1) 1.0 µF C1, C2, C3, C7, C8 Murata
1 Electrolytic capacitor EEEFK1A151P 150 µF C4 Panasonic
1 Tantalum capacitor M/16V/B(2) 10 µF C6
2 LED HSMG-C170 D1, D4 AVAGO Technologies
1 LED HSMH-C170 D2 AVAGO Technologies
1 LED HSMY-C170 D3 AVAGO Technologies
1 USB3.0 connector GSB316441CEU A type, plug J2 Amphenol
1 USB3.0 connector USB3-A-S-S-TH A type, receptacle J3 Samtec
1 Terminal block ARK210/2EX J4 GM® ELECTRONIC
1 Pin header 2r x 5p PLD-10S 2.54 mm, straight, male J5 GES®ELECTRONICS
1 Connector DZZ-15BCNS-1 CANON, female J6 HSUAN MAO TECHNOLOGY CO.,LTD
1 FET BSS138 Q1
1 Resistor J/0805(3) 18 kR1
1 Resistor J/0805(3) 6.2 kR16
1 Resistor J/0805(3) 15 kR17
1 Surface mount trimmer 3314G-1-503E 50 kR18 BOURNS®
4 Resistor J/0805(3) 10 kR19, R20, R21, R22
2 Resistor J/0805(3) 100 kR2, R3
1 Surface mount trimmer 3314G-1-104E 100 kR26 BOURNS
4 Resistor J/0805(3) 1.0 kR9, R10, R11, R12
6 Pin header 1r x 3p PLS-03S 2.54 mm, straight, male SW1, SW2, SW3, SW4, SW5, SW6 GES ELECTRONICS
6 Jumper JUMPER/0 2.54 mm Accessories (SW1, SW2, SW3,
SW4, SW5, SW6) GES ELECTRONICS
2 Pin header 1r x 4p SIL40PZ / 4 2.54 mm, straight, female (TP7-TP8-TP9-TP13), (TP5-TP6-
TP11-TP12) GM ELECTRONIC

Schematic, BOM, and layers UM1551 10/17 DocID023275 Rev 1
1 Pin header 1r x 3p SIL40PZ / 3 2.54 mm, straight, female (TP1-TP2-TP3) GM ELECTRONIC
8 Pin header 1r x 1p SIL40PZ / 1 straight, female TP4, TP10, TP14, TP15, TP16,
TP17, TP18, TP19 GM ELECTRONIC
1 IC
STCC5011,
STCC5021 or
STCC2540
U1 STMicroelectronics™
1 IC ST715MR U4 STMicroelectronics
1. SMD … tolerance / voltage / size.
2. SMD … tolerance / size.
3. SMD … tolerance / voltage / dielectric / size.
Table 4. Bill of material (continued)
Qty. Component Device Value Parts Manufacturer/supplier