Datasheet

GND

D+

D−

BUS

USB Connector

GND

5.0 V

BUS

–

1.2 V

200 W (max)

UDG-12103

TPS2511

www.ti.com

SLUSB18 –JUNE 2012

Applying 1.2 V to the D+ Line and 1.2 V to the D– Line

As shown in Figure 27, some tablet USB chargers require 1.2 V on the shorted data lines of the USB connector.

The maximum resistance between the D+ line and the D- line is 200 Ω.

Figure 27. DCP Applying 1.2 V to the D+ Line and 1.2 V to the D– Line

The TPS2511 is a combination of a current-limiting USB power switch and an USB DCP identification controller.

Applications include vehicle power charger, wall adapters with USB DCP and other USB chargers. The TPS2511

DCP controller has the auto-detect feature that monitors the D+ and D– line voltages of the USB connector,

providing the correct electrical characteristics on the DP and DM pins for the correct detections of compliant

portable devices to fast charge. These portable devices include smart phones, 5-V tablets and personal media

players.

The TPS2511 power-distribution switch is intended for applications where heavy capacitive loads and short-

circuits are likely to be encountered, incorporating a 70-mΩ, N-channel MOSFET in a single package. This

device provides hiccup mode when in current limit and OUT voltage is less than 3.8 V (typ) or an over

temperature protection occurs under an overload condition. Hiccup mode operation can reduce the output short-

circuit current down to several milliamperes. The TPS2511 provides a logic-level enable EN pin to control the

device turn-on and tuen-off and an open drain output CS for compensating V

BUS

to account for cable I × R

voltage loss.

DCP Auto-Detect

The TPS2511 integrates an auto-detect feature to support divider mode, short mode and 1.2 V / 1.2 V mode. If a

divider device is attached, 2.7 V is applied to the DP pin and 2.0 V is applied to the DM pin. If a BC1.2-compliant

device is attached, the TPS2511 automatically switches into short mode. If a device compliant with the 1.2 V /

1.2 V charging scheme is attached, 1.2 V is applied on both the DP pin and the DM pin. The functional diagram

of DCP auto-detect feature is shown in Figure 28.

Product Folder Link(s) :TPS2511