SLLSEK4B – JULY 2015 – REVISED JANUARY 2016
Product Folder Links: TUSB4041I-Q1
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Copyright © 2015–2016, Texas Instruments Incorporated
5 Description (continued)
The TUSB4041I-Q1 device supports per-port or ganged power switching and overcurrent protection. The device
also supports battery charging applications.
An individually port-power-controlled hub switches power on or off to each downstream port as requested by the
USB host. Also when an individually port-power-controlled hub senses an overcurrent event, only power to the
affected downstream port is switched off.
A ganged hub switches on power to all of the downstream ports when power is required to be on for any port.
The power to the downstream ports is not switched off unless all ports are in a state that allows power to be
removed. Also, when a ganged hub senses an overcurrent event, power to all downstream ports are switched
The TUSB4041I-Q1 device downstream ports provide support for battery charging applications by providing USB
battery charging downstream-port (CDP) handshaking support. The device also supports a dedicated charging-
port (DCP) mode when the upstream port is not connected. The DCP mode is compliant with the USB battery
charging specification and Chinese Telecommunications Industry Standard YD/T 1591-2009. Also, an automatic
mode provides transparent support for BC devices and devices supporting divider-mode charging solutions when
the upstream port unconnected.
The TUSB4041I-Q1 device provides pin-strap configuration for some features including battery charging support,
and also provides customization though OTP ROM, I2C EEPROM, or through an I2C and SMBus slave interface
for PID, VID, and custom port and phy configurations. Custom string support is also available when using an I
EEPROM or the I2C and SMBus slave interface.
The device is available in a 64-pin PAP package and is offered in a industrial version for operation over the
temperature range of –40°C to 85°C.