TPS2511-Q1 Datasheet, PDF (13/28 Pages) Texas Instruments – USB Dedicated Charging Port Controller and Current Limiting Power Switch

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TPS2511-Q1
SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
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.
5.0 V
V_BUS
V_BUS
D−
200 W (max)
D+
+ _{1.2 V}
–
GND
GND
UDG-12103
Figure 27. DCP Applying 1.2 V to the D+ Line and 1.2 V to the D– Line
The TPS2511-Q1 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-Q1 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-Q1 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-Q1 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-Q1 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-Q1 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.
Copyright © 2013, Texas Instruments Incorporated
Product Folder Links :TPS2511-Q1
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