UM1551 datasheet(5/17 Pages) STMICROELECTRONICS

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UM1551

Description

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.

UM1551 датащи(PDF) 5 Page - STMicroelectronics