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TPS2511
SLUSB18A – JUNE 2012 – REVISED AUGUST 2016
TPS2511 USB Dedicated Charging Port Controller and Current Limiting Power Switch
1 Features
3 Description
•
•
The TPS2511 device is a USB-dedicated charging
port (DCP) controller and current-limiting power
switch. An auto-detect feature monitors USB data line
voltage, and automatically provides the correct
electrical signatures on the data lines to charge
compliant devices among the following dedicated
charging schemes:
1. Divider DCP, required to apply 2.7 V and 2 V on
the D+ and D– lines respectively or 2 V and 2.7 V
on the D+ and D– lines respectively
2. BC1.2 DCP, required to short the D+ line to the
D– line
3. 1.2 V on both D+ and D– lines
1
•
•
•
•
•
•
•
•
•
•
Supports a USB DCP Shorting D+ Line to D– Line
Supports a USB DCP Applying 2 V on D+ Line
and 2.7 V on D– Line (or a USB DCP Applying
2.7 V on D+ Line and 2 V on D– Line)
Supports a USB DCP Applying 1.2 V on D+ and
D– Lines
Automatically Switch D+ and D– Lines
Connections for an Attached Device
Hiccup Mode for Output Short-Circuit Protection
Provides CS Pin for USB Cable Compensation
Programmable Current Limit (ILIM_SET Pin)
Accurate ±10% Current Limit at 2.3 A (Typical)
70-mΩ (Typical) High-Side MOSFET
Compatible With USB 2.0 and 3.0 Power Switch
Requirements
Operating Range: 4.5 V to 5.5 V
Available in 8-Pin MSOP-PowerPAD™ Package
2 Applications
•
•
•
Vehicle USB Power Chargers
AC-DC Wall Adapter With USB Ports
Other USB Chargers
The TPS2511 is a 70-mΩ power-distribution switch
intended for applications where heavy capacitive
loads and short circuits are likely to be encountered.
This device also provides hiccup mode when the
output (OUT) voltage is less than 3.8 V (typical) or
when an overtemperature protection occurs during an
overload condition. Accurate and programmable
current limit provides flexibility and convenience for
applications. The TPS2511 provides a CS pin for
USB cable resistance compensation and an EN pin to
control the device turnon and turnoff.
Device Information(1)
PART NUMBER
TPS2511
PACKAGE
BODY SIZE (NOM)
MSOP-PowerPAD (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
5.0 VOUT
5.0 V
TPS2511
GND
OUT
8
2
ILIM_SET
DM
7
3
IN
DP
6
4
CS
EN
5
VBUS
C OUT
FB
PAD
D−
D+
GND
USB Connector
AC-to-DC Converter
or
Buck DC-to-DC
Converter
1
C USB
RILIM
GND
Power Supply
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS2511
SLUSB18A – JUNE 2012 – REVISED AUGUST 2016
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
4
6.1
6.2
6.3
6.4
6.5
6.6
6.7
4
4
4
5
5
6
8
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Switching Characteristics ..........................................
Typical Characteristics ..............................................
Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 15
8
Application and Implementation ........................ 19
8.1 Application Information............................................ 19
8.2 Typical Application .................................................. 19
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Example .................................................... 23
11 Device and Documentation Support ................. 24
11.1
11.2
11.3
11.4
11.5
11.6
Documentation Support ........................................
Receiving Notification of Documentation Updates
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
24
24
24
24
24
24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
Changes from Original (June 2012) to Revision A
Page
•
Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
•
Deleted Ordering Information table, see POA at the end of the document............................................................................ 1
2
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5 Pin Configuration and Functions
DGN Package
8-Pin MSOP With PowerPAD™
Top View
GND
1
8
OUT
ILIM_SET
2
7
DM
IN
3
6
DP
CS
4
5
EN
Pin Functions
PIN
NAME
NO.
TYPE (1)
DESCRIPTION
CS
4
O
Active-low, open-drain output. When OUT current is more than approximately half of the
current limit set by a resistor on ILIM_SET pin, the output is active low. Maximum sink
current is 10 mA.
DM
7
I/O
Connected to the D– or D+ line of USB connector. Provide the correct voltage with an
attached portable equipment for DCP detection, high impedance while disabled.
DP
6
I/O
Connected to the D+ or D– line of USB connector. Provide the correct voltage with an
attached portable equipment for DCP detection, high impedance while disabled.
EN
5
I
Logic-level control input. When it is high, turns power switch on, when it is low, turns power
switch off and turns DP and DM into the high impedance state.
GND
1
G
Ground connection.
ILIM_SET
2
I
External resistor used to set current limiting Threshold. TI recommends 16.9 kΩ ≤ RILIM_SET ≤
750 kΩ.
IN
3
P
Power supply input voltage connected to the power switch. Connect a ceramic capacitor with
a value of 0.1-µF or greater from the IN pin to GND as close to the device as possible.
8
O
Power-switch output. Connect to VBUS of USB
PowerPAD
G
Ground connection.
OUT
PowerPAD
(1)
G = Ground, I = Input, O = Output, P = Power
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6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
Voltage
MIN
MAX
IN
Supply voltage
–0.3
7
EN, ILIM_SET
Input voltage
–0.3
7
OUT, CS
–0.3
7
IN to OUT
–7
7
–0.3
IN+0.3 or
5.7
–0.3
IN+0.3 or
5.7
DP output voltage DM output
Current
DM input
DP input current,
DM input current
Continuous output sink current
35
DP output
current, DM
output current
Continuous output source current
35
CS
Continuous output sink current
ILIM_SET
Continuous output source current
V
mA
10
Internally limited
Operating junction temperature, TJ
Temperature
(1)
DP input voltage
UNIT
Internally limited
Storage temperature, Tstg
–65
150
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
6.2 ESD Ratings
VALUE
V(ESD)
Electrostatic discharge
Human-body model (HBM), per
ANSI/ESDA/JEDEC JS-001 (1)
All pins except 6 and 7
Pins 6 and 7
±7500
Charged-device model (CDM), per JEDEC specification JESD22-C101
(1)
(2)
UNIT
±2000
(2)
V
±500
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
voltages are referenced to GND (unless otherwise noted), positive current are into pins.
MIN
MAX
4.5
5.5
Input voltage of CS
0
5.5
VEN
Input voltage of EN
0
5.5
VDP
DP data line input voltage
0
5.5
VDM
DM data line input voltage
0
IDP
Continuous sink/source current
±10
IDM
Continuous sink/source current
±10
ICS
Continuous sink current
IOUT
Continuous output current of OUT
RILIM_SET
A resistor of current limit, ILIM_SET to GND
TJ
Operating junction temperature
VIN
Input voltage of IN
VCS
4
UNIT
V
5.5
mA
2
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2.2
A
16.9
750
kΩ
–40
125
ºC
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6.4 Thermal Information
TPS2511
THERMAL METRIC
DGN
(MSOP-PowerPAD)
(1)
UNIT
8 PINS
RθJA
Junction-to-ambient thermal resistance
65.2
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
53.3
°C/W
RθJB
Junction-to-board thermal resistance
36.9
°C/W
ψJT
Junction-to-top characterization parameter
3.9
°C/W
ψJB
Junction-to-board characterization parameter
36.6
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
13.4
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
6.5 Electrical Characteristics
Conditions are –40°C ≤ (TJ = TA) ≤ 125°C, 4.5 V ≤ VIN ≤ 5.5 V, VEN = VIN and RILIM_SET = 22.1 kΩ. Positive current are into
pins. Typical values are at 25°C. All voltages are with respect to GND (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IOUT = 2 A
70
120
IOUT = 2 A, –40ºC ≤ (TJ =TA) ≤ 85ºC
70
105
IOUT = 2 A, TJ =TA = 25ºC
70
84
0.01
2
µA
400
500
630
Ω
RILIM_SET = 44.2 kΩ
1060
1160
1270
RILIM_SET = 22.1 kΩ
2110
2300
2550
RILIM_SET = 16.9 kΩ
2760
3025
3330
3.6
3.8
4.1
4.1
4.3
POWER SWITCH
RDS(on)
IREV
Static drain-source ON-state
resistance
Reverse leakage current
VOUT = 5.5 V, VIN = VEN = 0 V
Discharge resistance
VOUT = 4 V
mΩ
DISCHARGE
RDCHG
CURRENT LIMIT
IOS
OUT short-circuit current limit
mA
HICCUP MODE
VOUT_SHORT
OUT voltage threshold of going
into hiccup mode
VIN = 5 V, RILIIM_SET = 210 kΩ
V
UNDERVOLTAGE LOCKOUT
VUVLO
IN UVLO threshold voltage, rising
3.9
Hysteresis (1)
100
V
mV
SUPPLY CURRENT
IIN_OFF
Disabled, IN supply current
VEN = 0 V, VIN = 5.5 V,
–40ºC ≤ TJ ≤ 85ºC
0.1
2
IIN_ON
Enabled, IN supply current
VEN = VIN, RILIM_SET = 210 kΩ
180
230
µA
THERMAL SHUTDOWN
Temperature rising threshold (1)
Hysteresis
Not in current limit
155
In current limit
135
(1)
ºC
10
OUT CURRENT DETECTION
IHCC_TH
Load detection current threshold,
rising (1)
RILIM_SET = 22.1 kΩ
1060
RILIM_SET = 44.2 kΩ
560
IHCC_TH_HYS
Load detection current
Hysteresis (1)
RILIM_SET = 22.1 kΩ
230
RILIM_SET = 44.2 kΩ
120
VCS
CS output active-low voltage (1)
ICS = 1 mA
(1)
0
80
mA
mA
140
mV
Specified by design. Not production tested.
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Electrical Characteristics (continued)
Conditions are –40°C ≤ (TJ = TA) ≤ 125°C, 4.5 V ≤ VIN ≤ 5.5 V, VEN = VIN and RILIM_SET = 22.1 kΩ. Positive current are into
pins. Typical values are at 25°C. All voltages are with respect to GND (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ENABLE INPUT (EN)
VEN_TRIP
EN threshold voltage, falling
0.9
1.1
1.65
V
VEN_TRIP_HYS
Hysteresis
100
200
300
mV
IEN
Leakage current
0.5
µA
125
200
Ω
400
700
1300
kΩ
310
330
350
mV
VEN = 0 V or VEN = 5.5 V
–0.5
BC 1.2 DCP MODE (SHORT MODE)
RDPM_SHORT
DP and DM shorting resistance
VDP = 0.8 V, IDM = 1 mA
RDCHG_SHORT
Resistance between DP/DM and
GND
VDP = 0.8 V
VDPL_TH_DETACH
Voltage threshold on DP under
which the device goes back to
divider mode
VDPL_TH_DETACH_HYS
Hysteresis
50
(1)
mV
DIVIDER MODE
VDP_2.7V
DP output voltage
VIN = 5 V
2.57
2.7
2.84
VDM_2.0V
DM output voltage
VIN = 5 V
1.9
2
2.1
RDP_PAD1
DP output impedance
IDP = –5 µA
24
30
40
RDM_PAD1
DM output impedance
IDM = –5 µA
24
30
40
VDP_1.2V
DP output voltage
VIN = 5 V
1.12
1.2
1.28
VDM_1.2V
DM output voltage
VIN = 5 V
1.12
1.2
1.28
V
RDP_PAD2
DP output impedance
IDP = –5 uA
80
105
130
kΩ
RDM_PAD2
DM output impedance
IDM = –5 uA
80
105
130
kΩ
V
kΩ
1.2 V / 1.2 V MODE
V
6.6 Switching Characteristics
Conditions are –40°C ≤ (TJ = TA) ≤ 125°C, 4.5 V ≤ VIN ≤ 5.5 V, VEN = VIN and RILIM_SET = 22.1 kΩ. Positive current are into
pins. Typical values are at 25°C. All voltages are with respect to GND (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
1
1.5
0.35
0.5
UNIT
POWER SWITCH
tr
OUT voltage rise time
CL = 1 µF, RL = 100 Ω, VIN = 5 V
see Figure 1, Figure 3
tf
OUT voltage fall time
CL = 1 µF, RL = 100 Ω, VIN = 5 V
see Figure 1, Figure 3
ms
0.2
CURRENT LIMIT
Short circuit response time (1)
tIOS
VIN = 5 V, RL = 50 mΩ, 2 inches
lead length, See Figure 4
1.5
µs
VIN = 5 V, RL = 0
16
ms
VIN = 5 V, RL = 0
12
s
8
ms
HICCUP MODE
tOS_DEG
ON-time of hiccup mode (1)
tSC_TURN_OFF OFF-time of hiccup mode (1)
OUT CURRENT DETECTION
tCS_EN
CS deglitch time during turning on (1) ICS = 1 mA
ENABLE INPUT (EN)
ton
OUT voltage turnon time
toff
OUT voltage turnoff time
(1)
6
CL = 1 µF, RL = 100 Ω,
see Figure 1, Figure 2
2.6
5
1.7
3
ms
Specified by design. Not production tested.
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OUT
RL
CL
Figure 1. Output Rise and Fall Test Load
50%
VEN
50%
ton
toff
90%
VOUT
10%
Figure 2. Enable Timing, Active High Enable
90%
VOUT
tf
tr
10%
Figure 3. Power On and Power Off
IOS
IOUT
tIOS
Figure 4. Output Short-Circuit Parameters
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6.7 Typical Characteristics
2.4
3.2
V IN = 5 V, R ILIM_SET = 16.9 k W
V IN = 5 V
VDP
Supply Current, Disabled - mA
DP and DM Output Voltage - V
VDM
2.8
2.4
2
1.6
-40
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
1.6
0.8
0
-2
-40
120
Figure 5. DP and DM Output Voltage vs Temperature
0
20
40
60
80
TJ - Junction Temperature - °C
100
120
Figure 6. Supply Current Disabled vs Temperature
230
3
V IN = 5 V
V IN = 5 V
R ILIM_SET = 20 k W
R ILIM_SET = 22.1 k W
2.8
210
ICC - Current Limit - A
Supply Current, Enabled - mA
-20
190
2.6
2.4
170
2.2
R ILIM = 16.9 k W
R ILIM = 210 k W
150
-40
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
120
2
-40
Figure 7. Supply Current Enabled vs Temperature
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
120
Figure 8. Current Limit vs Temperature
120
V IN = 5 V, I OUT = 2 A
RDS(ON) - mW
100
80
60
40
-40
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
120
Figure 9. Power Switch ON-Resistance (RDS(ON)) vs Temperature
8
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7 Detailed Description
7.1 Overview
The following overview references various industry standards. TI always recommends consulting the latest
standard to ensure the most recent and accurate information.
Rechargeable portable equipment requires an external power source to charge its batteries. USB ports are
convenient locations for charging because of an available 5-V power source. Universally accepted standards are
required to ensure host and client-side devices meet the power management requirements. Traditionally, USB
host ports following the USB 2.0 Specification must provide at least 500 mA to downstream client-side devices.
Because multiple USB devices can be attached to a single USB port through a bus-powered hub, it is the
responsibility of the client-side device to negotiate the power allotment from the host to ensure the total current
draw does not exceed 500 mA. The TPS2511 provides 100 mA of current to each USB device. Each USB device
can subsequently request more current, which is granted in steps of 100 mA up 500 mA total. The host may
grant or deny the request based on the available current.
Additionally, the success of the USB technology makes the micro-USB connector a popular choice for wall
adapter cables. This allows a portable device to charge from both a wall adapter and USB port with only one
connector.
One common difficulty has resulted from this. As USB charging has gained popularity, the 500-mA minimum
defined by the USB 2.0 Specification or 900 mA defined in the USB 3.0 Specification, has become insufficient for
many handsets, tablets, and personal media players (PMP), which have a higher-rated charging current. Wall
adapters and car chargers can provide much more current than 500 mA or 900 mA to fast charge portable
devices. Several new standards have been introduced defining protocol handshaking methods that allow host
and client devices to acknowledge and draw additional current beyond the 500 mA (defined in the USB 2.0
Specification) or 900 mA (defined in the USB 3.0 Specification) minimum while using a single micro-USB input
connector.
The TPS2511 supports three of the most common protocols:
• USB Battery Charging Specification, Revision 1.2 (BC1.2)
• Chinese Telecommunications Industry Standard YD/T 1591-2009
• Divider Mode
In these protocols there are three types of charging ports defined to provide different charging current to clientside devices. These charging ports are defined as:
• Standard downstream port (SDP)
• Charging downstream port (CDP)
• Dedicated charging port (DCP)
The BC1.2 Specification defines a charging port as a downstream facing USB port that provides power for
charging portable equipment.
Table 1 lists different port operating modes according to the BC1.2 Specification.
Table 1. Operating Modes Table
SUPPORTS USB 2.0
COMMUNICATION
MAXIMUM ALLOWABLE CURRENT
DRAWN
BY PORTABLE EQUIPMENT (A)
SDP (USB 2.0)
Yes
0.5
SDP (USB 3.0)
Yes
0.9
CDP
Yes
1.5
DCP
No
1.5
PORT TYPE
The BC1.2 Specification defines the protocol necessary to allow portable equipment to determine what type of
port it is connected to so that it can allot its maximum allowable current drawn. The hand-shaking process is two
steps. During step one, the primary detection, the portable equipment outputs a nominal 0.6-V output on its D+
line and reads the voltage input on its D– line. The portable device concludes it is connected to a SDP if the
voltage is less than the nominal data detect voltage of 0.3 V. The portable device concludes that it is connected
to a Charging Port if the D– voltage is greater than the nominal data detect voltage of 0.3 V and less than 0.8 V.
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The second step, the secondary detection, is necessary for portable equipment to determine between a CDP and
a DCP. The portable device outputs a nominal 0.6-V output on its D– line and reads the voltage input on its D+
line. The portable device concludes it is connected to a CDP if the data line being remains is less than the
nominal data detect voltage of 0.3 V. The portable device concludes it is connected to a DCP if the data line
being read is greater than the nominal data detect voltage of 0.3 V and less than 0.8 V.
7.2 Functional Block Diagram
Current Sense
IN
CS
OUT
Current
Limit
ILIM_SET
Disable+UVLO
GND
8-ms
Deglitch
Charge
Pump
EN
Driver
UVLO
Thermal
Sense
Hiccup
CS
REF
+
S1
DP
S2
S4
Auto
Detect
S3
+
–
+
–
2.0 V
+
–
2.7 V
DM
+
–
1.2 V
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7.3 Feature Description
7.3.1 Overcurrent Protection
During an overload condition, the TPS2511 maintains a constant output current and reduces the output voltage
accordingly. If the output voltage falls to less than 3.8 V for 16 ms, the TPS2511 turns off the output for a period
of 12 seconds as shown in Figure 10. This operation is referred to as hiccup mode. The device stays in hiccup
mode (power cycling) until the overload condition is removed. Therefore the average output current is
significantly reduced to greatly improve the thermal stress of the device while the OUT pin is shorted.
ON
OFF
tSC_TURN_OFF
IOC
tOS_DEG
IOUT(av)
0A
UDG-12108
Figure 10. OUT Pin Short-Circuit Current in Hiccup Mode
Two possible overload conditions can occur. In the first condition, the output has been shorted before the device
is enabled or before the voltage of IN has been applied. The TPS2511 senses the short and immediately
switches into hiccup mode of constant-current limiting. In the second condition, a short or an overload occurs
while the device is enabled. At the instant the overload occurs, high currents may flow for several microseconds
before the current limit circuit can react. The device operates in constant-current mode for a period of 16 ms after
the current limit circuit has responded, then switches into hiccup mode (power cycling).
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Feature Description (continued)
7.3.2 Current Limit Threshold
The TPS2511 has a current limiting threshold that is externally programmed with a resistor. Equation 1 and
Figure 11 help determine the typical current limit threshold.
51228
IOS_ TYP =
RILIM
where
•
•
IOS_TYP is in mA and RILIM is in kΩ
IOS_TYP has a better accuracy if RILIM is less than 210 kΩ
3.5
(1)
IOS_TYP
VIN = 5 V
OUT Short Circuit Current Limit - A
3
2.5
2
1.5
1
0.5
0
10
60
110 160 210 260 310 360 410 460 510 560 610 660 700
Current-Limit Programming Resistor of ILIM_SET - kW
Figure 11. Typical Current Limit vs Programming Resistor
7.3.3 Current-Sensing Report (CS)
The CS open-drain output is asserted immediately when the OUT pin current is more than about half of the
current limit set by a resistor on ILIM_SET pin. Built-in hysteresis improves the ability to resist current noise on
the OUT pin. The CS output is active low. The recommended operating sink current is less than 2 mA and
maximum sink current is 10 mA.
7.3.4 Undervoltage Lockout (UVLO) and Enable (EN)
The undervoltage lockout (UVLO) circuit disables the power switch and other functional circuits until the input
voltage reaches the UVLO turnon threshold. Built-in hysteresis prevents unwanted oscillations on the output due
to input voltage drop from large current surges.
The logic input of the EN pin disables all of the internal circuitry while maintaining the power switch off. A logichigh input on the EN pin enables the driver, control circuits, and power switch. The EN input voltage is
compatible with both TTL and CMOS logic levels.
7.3.5 Soft Start, Reverse Blocking, and Discharge Output
The power MOSFET driver incorporates circuitry that controls the rise and fall times of the output voltage to limit
large current and voltage surges on the input supply, and provides built-in soft-start functionality. The TPS2511
power switch blocks current from the OUT pin to the IN pin when turned off by the UVLO or disabled. The
TPS2511 includes an output discharge function. A 500-Ω (typical) discharge resistor dissipates stored charge
and leakage current on the OUT pin when the device is in UVLO or disabled. However as this circuit is biased
from the IN pin, the output discharge is not active when the input approaches 0 V.
12
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Feature Description (continued)
7.3.6 Thermal Sense
The TPS2511 provides thermal protection from two independent thermal-sensing circuits that monitor the
operating temperature of the power distribution switch and turnoff for 12 s (typical) if the temperature exceeds
recommended operating conditions. The device operates in constant-current mode during an overcurrent
condition and OUT pin voltage is greater than 3.8 V (typical), which has a relatively large voltage drop across
power switch. The power dissipation in the package is proportional to the voltage drop across the power switch,
so the junction temperature rises during the overcurrent condition. The first thermal sensor turns off the power
switch when the die temperature exceeds 135°C and the device is within the current limit. The second thermal
sensor turns off the power switch when the die temperature exceeds 155°C regardless of whether the power
switch is in current limit. Hysteresis is built into both thermal sensors, and the switch turns on after the device
has cooled approximately 10°C. The switch continues to cycle off and on until the fault is removed.
7.3.7 VBUS Voltage Drop Compensation
Figure 12 shows a USB charging design using the TPS2511. In general, VBUS has some voltage loss due to USB
cable resistance and TPS2511 power switch ON-state resistance. The sum of voltage loss is likely several
hundred millivolts from 5-VOUT to VPD_IN that is the input voltage of PD while the high charging current charges
the PD. For example, in Figure 13, assuming that the loss resistance is 170 mΩ (includes 100 mΩ of USB cable
resistance and 70 mΩ of power switch resistance) and 5 VOUT is 5 V, the input voltage of PD (VPD_IN) is about
4.66 V at 2 A (see Figure 13).
5VOUT
5.0 V
VPD_IN
100 kW
R1
TPS2511
AC-to-DC Converter
or
Buck DC -to-DC
Converter
C OUT
R2
GND
OUT
8
2
ILIM_SET
DM
7
3
IN
DP
6
4
CS
EN
5
D−
R4
FB
PAD
VBUS
D+
GND
USB Connector
IOUT
1
IOUT
Portable Device
Cable
CUSB
0.1 mF
R3
R ILIM
GND
Power Supply
Copyright © 2016, Texas Instruments Incorporated
Figure 12. TPS2511 Charging System Schematic Diagram
The charging current of most portable devices is less than their maximum charging current while VPD_IN is less
than the certain voltage value. Furthermore, actual charging current of PD decreases with input voltage falling.
Therefore, a portable devices cannot accomplish a fast charge with its maximum charging rated current if VBUS
voltage drop across the power path is not compensated at the high charging current. The TPS2511 provides CS
pin to report the high charging current for USB chargers to increase the 5-VOUT voltage. This is shown by the
solid lines of Figure 13.
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Feature Description (continued)
Output Voltage (V)
5.25
5.15
5.00
4.75
4.66
5 VOUT with compensation
VPD_IN with compensation
5 VOUT without compensation
VPD_IN without compensation
0
0.5
1.5
1.0
Output Current (A)
2.0
2.5
UDG-12109
Figure 13. TPS2511 CS Function
Equation 2 through Equation 5 refer to Figure 12.
The power supply output voltage is calculated in Equation 2.
(R1 + R 2 + R 3 )´ VFB
5 VOUT =
R3
(2)
5 VOUT and VFB are known. If R3 is given and R1 is fixed, R2 can be calculated. The 5 VOUT voltage change with
compensation is shown in Equation 3 and Equation 4.
(R 2 + R 3 )´ R1 ´ VFB
DV =
R3 ´ R4
(3)
æ 5V
R öR ´V
ΔV = ç OUT - 1 ÷ 1 FB
R3 ø R4
è VFB
(4)
If R1 is less than R3, then Equation 4 can be simplified as Equation 5.
5VOUT ´ R1
DV »
R4
(5)
7.3.8 Divide Mode Selection of 5-W and 10-W USB Chargers
The TPS2511 provides two types of connections between the DP pin and the DM pin and between the D+ data
line and the D– data line of the USB connector for a 5-W USB charger and a 10-W USB charger with a single
USB port. For a 5-W USB charger, the DP pin is connectd to the D– line and the DM pin is connected to the D+
line. This is shown in Figure 16 and Figure 17. It is necessary to apply DP and DM to D+ and D– of USB
connector for 10-W USB chargers. See Figure 14 and Figure 15. Table 2 shows different charging schemes for
both 5-W and 10-W USB charger solutions
Table 2. Charging Schemes for 5-W and 10-W USB Chargers
USB CHARGER TYPE
14
CONTAINING CHARGING SCHEMES
5-W
Divider1
1.2 V on both D+ and D– Lines
BC1.2 DCP
10-W
Divider2
1.2 V on both D+ and D– Lines
BC1.2 DCP
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TPS2511
5
4
2
IN
OUT
DM
EN
CS
DP
ILIM_SET
GND
8
7
6
1
VBUS
DD+
GND
TPS2511
5.0 V
Power
Supply
PAD
3
IN
OUT
8
5
EN
DM
7
4
CS
DP
6
2
ILIM_SET
GND
1
RILIM
VBUS
DD+
GND
USB Connector
3
USB Connector
5.0 V
Power
Supply
PAD
RILIM
UDG-12104
UDG-12105
Figure 14. 10-W USB Charger Application With
Power Switch
Figure 15. 10-W USB Charger Application Without
Power Switch
TPS2511
5
4
2
IN
OUT
DM
EN
CS
DP
ILIM_SET
GND
8
7
6
1
VBUS
DD+
GND
TPS2511
5.0 V
Power
Supply
PAD
RILIM
3
IN
OUT
8
5
EN
DM
7
4
CS
DP
6
2
ILIM_SET
GND
1
VBUS
DD+
GND
USB Connector
3
USB Connector
5.0 V
Power
Supply
PAD
RILIM
UDG-12106
UDG-12107
Figure 16. 5-W USB Charger Application With
Power Switch
Figure 17. 5-W USB Charger Application Without
Power Switch
7.4 Device Functional Modes
7.4.1 Dedicated Charging Port (DCP)
A dedicated charging port (DCP) is a downstream port on a device that outputs power through a USB connector,
but is not capable of enumerating a downstream device, which generally allows portable devices to fast charge at
their maximum rated current. A USB charger is a device with a DCP, such as a wall adapter or car power
adapter. A DCP is identified by the electrical characteristics of its data lines. The following DCP identification
circuits are usually used to meet the handshaking detections of different portable devices.
7.4.1.1 Short the D+ Line to the D– Line
The USB BC1.2 Specification and the Chinese Telecommunications Industry Standard YD/T 1591-2009 define
that the D+ and D– data lines must be shorted together with a maximum series impedance of 200 Ω. This is
shown in Figure 18.
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Device Functional Modes (continued)
5.0 V
VBUS
USB Connector
VBUS
D−
200 W (max )
D+
GND
GND
UDG-12100
Figure 18. DCP Short Mode
7.4.1.2 Divider1 (DCP Applying 2 V on D+ Line and 2.7 V on D– Line) or Divider2 (DCP Applying 2.7 V on
D+ Line and 2 V on D– Line)
There are two charging schemes for divider DCP. They are named after Divider1 and Divider2 DCPs that are
shown in Figure 19 and Figure 20. The Divider1 charging scheme is used for 5-W adapters, Divider1 applies 2 V
to the D+ line and 2.7 V to the D– data line. The Divider2 charging scheme is used for 10-W adapters and
applies 2.7 V on the D+ line and 2 V is applied on the D– line.
VBUS
VBUS
VBUS
VBUS
D−
D+
2.7 V 2.0 V
+
+
–
–
GND
GND
D−
D+
2.0 V 2.7 V
+
+
–
–
UDG-12101
Figure 19. Divider1 DCP
GND
GND
USB Connector
5.0 V
USB Connector
5.0 V
UDG-12102
Figure 20. Divider2 DCP
7.4.1.3 Applying 1.2 V to the D+ Line and 1.2 V to the D– Line
As shown in Figure 21, 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.
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Device Functional Modes (continued)
VBUS
D−
200 W (max)
D+
GND
+
–
USB Connector
VBUS
5.0 V
1.2 V
GND
UDG-12103
Figure 21. 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 (typical) or an overtemperature protection occurs under an overload condition. Hiccup mode operation can reduce the output shortcircuit current down to several milliamperes. The TPS2511 provides a logic-level enable EN pin to control the
device turnon and turnoff and an open-drain output CS for compensating VBUS to account for cable I × R voltage
loss.
7.4.2 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 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 22.
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Device Functional Modes (continued)
OUT
8
VBUS
DM
S1
D–
6
D+
S2
S4
GND
USB Connector
5V
Short Mode
S4: ON
S1, S2, S3: OFF
1.2 V on DP and DM
S3, S4: ON
S1, S2: OFF
DP
S3
Divider 2
S1, S2: ON
S3, S4: OFF
7
+
–
2V
+
–
2.7 V
+
–
1.2 V
GND
1
TPS2511
GND
UDG-12099
Figure 22. TPS2511 DCP Auto-Detect Functional Diagram
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8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The TPS2511 is a USB-dedicated charging-port controller and power switch with cable compensation. It is
typically used for wall adapter or power bank as a USB charging controller and overcurrent protector.
8.2 Typical Application
VIN
IOUT
100 kW
100 kW
TPS2511
3
IN
OUT
8
EN
5
EN
DM
7
CS
4
CS
DP
6
2
ILIM_SET
GND
1
PAD
VBUS
D–
D+
GND
USB Connector
0.1 mF
R LOAD
22 uF
22.1 kW
Figure 23. Test Circuit for System Operation
8.2.1 Design Requirements
For this design example, request IOS; Minimum must exceed 2100 mA.
When choosing the power switch, TI recommends following these general steps:
1. Determine the voltage of the power rail, 3.3 V or 5 V, and then choose the operation range of power switch
can cove power rail.
2. Determine the normal operation current; for example, the maximum allowable current drawn by portable
equipment for USB 2.0 port is 500 mA, so the normal operation current is 500 mA and the minimum current
limit of power switch must exceed 500 mA to avoid false trigger during normal operation.
3. Determine the maximum allowable current provided by up-stream power, and then decide the maximum
current limit of power switch that must lower it to ensure power switch can protect the up-stream power when
overload is encountered at the output of power switch.
NOTE
Choosing power switch with tighter current limit tolerance can loosen the up-stream power
supply design.
8.2.2 Detailed Design Procedure
The user-programmable RILIM resistor on the ILIMIT_SET pin sets the current limit. The TPS2511 uses an
internal regulation loop to provide a regulated voltage on the ILIM_SET pin. The current limiting threshold is
proportional to the current sourced out of the ILIM_SET pin. The recommended 1% resistor range for RILIM is
from 16.9 kΩ to 750 kΩ to ensure stability of the internal regulation loop, although not exceeding 210 kΩ results
in a better accuracy. Many applications require that the minimum current limit remain above a certain current
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Typical Application (continued)
level or that the maximum current limit remain below a certain current level, so it is important to consider the
tolerance of the overcurrent threshold when selecting a value for RILIM. Equation 6 and Equation 7 calculate the
resulting overcurrent thresholds for a given external resistor value (RILIM). The traces routing the RILIM resistor to
the TPS2511 must be as short as possible to reduce parasitic effects on the current limit accuracy. The
equations along with Figure 24 and Figure 25 can be used to estimate the minimum and maximum variation of
the current limit threshold for a predefined resistor value. This variation disregards the inaccuracy of the resistor
itself.
51228
IOS_ MIN =
1.0 30
RILIM
where
•
•
IOS_MIN is in mA
RILIM is in kΩ
(6)
xxxxxx
IOS_MAX =
51228
0.967
RILIM
where
•
•
IOS_MAX is in mA
RILIM is in kΩ
(7)
600m
VIN = 5 V
3
OUT Short Circuit Current Limit - A
OUT Short Circuit Current Limit - A
3.6
2.4
1.8
1.2
0.6
IOS_TYP
IOS_MIN
IOS_MAX
0
10
20
30
40
50
60 70
80
90 100
Current Limit Programming Resistor of ILIM_SET - kW
Figure 24. Current Limit Threshold vs Current Limit
Resistance
VIN = 5 V
æ 51228
÷
RILIM = ç
ç IOS _ MIN ÷
è
ø
20
1
æ 51228 ö1.03
=ç
÷
è 2100 ø
IOS_MIN
IOS_MAX
500m
400m
300m
200m
100m
0
100
200
300
400
500
600
700
Current Limit Programming Resistor of ILIM_SET - kW
Figure 25. Current Limit Threshold vs Current Limit
Resistance
For this example design, as shown in Equation 8, IOS_MIN = 2100 mA.
51228
IOS _ MIN =
= 2100 mA
RILIM1.03
1
ö1.03
IOS_TYP
(8)
= 22.227 kW
(9)
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Typical Application (continued)
Including resistor tolerance, target nominal resistance value given by Equation 10.
22.227 kW
RILIM =
= 22.007 kW
1.01 kW
(10)
Choose Equation 11.
RILIM = 22 kΩ
(11)
8.2.2.1 Input and Output Capacitance
Input and output capacitance improves the performance of the device; the actual capacitance must be optimized
for the particular application. For all applications, TI recommends placing a 0.1-µF or greater ceramic bypass
capacitor between IN and GND, as close to the device as possible for local noise decoupling. This precaution
reduces ringing on the input due to power-supply transients. Additional input capacitance may be needed on the
input to reduce voltage undershoot from exceeding the UVLO of other load share one power rail with TPS2511
or overshoot from exceeding the absolute-maximum voltage of the device during heavy transient conditions. This
is especially important during bench testing when long, inductive cables are used to connect the evaluation board
to the bench power supply.
TI recommends placing at least a 22-µF ceramic capacitor or higher-value electrolytic capacitor on the output pin
when large transient currents are expected on the output to reduce the undershoot, which is caused by the
inductance of the output power bus just after a short has occurred and the TPS2511 has abruptly reduced OUT
current. Energy stored in the inductance drives the OUT voltage down and potentially negative as it discharges.
8.2.3 Application Curves
4
8
3.2
6
4
4
2.4
4
3.2
2
1.6
2
2.4
0
0.8
0
1.6
0
-2
0.8
-0.8
-4
-2
-4
22 mF
222 mF
OUT
EN
-6
-6m
-4m
-2m
0
2m
4m
6m
Time - s
882 mF
1542 mF
8m
10m
12m
-1.6
14m
OUT, EN, CS - V
6
-6
-10m
0
10m
20m
0
CS
IOUT
OUT
EN
30m
IOUT - A
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 1.83 W
IOUT - A
OUT, EN - V
4.8
8
V IN = 5 V, R ILIM_SET = 22.1 k W , R L = 2.5 W
-0.8
40m
Time - s
Figure 26. Inrush Current With Different Capacitance Load
Figure 27. Enable into 1.83-Ω Load
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Typical Application (continued)
8
2.4
2
1.6
0
0.8
-2
0
NE
OUT
-15m
-10m
-5m
0
5m
IOUT
CS
10m
Time - s
15m
25m
20m
6
2.5
4
1.5
2
0.5
0
-0.5
IOUT
-0.8
30m
-10m
-5m
5m
0
Figure 28. Enable into 1-Ω Load
10m
DP
15m 20m
Time - s
25m
DM
30m
35m
-1.5
40m
Figure 29. Enable into Short
7.5
10
9
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 1 W
3
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 1 W
7.5
6
8
2
6
1
4
0
2
-1
3
1.5
1.5
0
-1.5
VIN
IOUT
OUT
CS
-3
-0.0004
0
0
-0.0002
0
Time - s
0.0002
-2
-2
-7
0.0004
IOUT
VIN
OUT
-0.8
IOUT - A
3
OUT, EN - V
4.5
IOUT - A
6
4.5
VIN, OUT, CS - V
EN
-2
IOUT - A
4
EN, DP, DM - V
3.2
IOUT - A
OUT, EN, CS - V
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 0 W
6
-4
3
7
4
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 1 W
-3
1
5
-3
9
13
Time - s
Figure 30. 1-Ω Load Applied
Figure 31. Hiccup Mode While Enabled into 1-Ω Load
6
3
4
2
2
1
0
0
IOUT
CS
-2
-220m
-120m
-20m
80m
IOUT - A
CS - V
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W
180m
-1
280m
Time - s
Figure 32. Output Current-Sensing Report
9 Power Supply Recommendations
Design of the devices is for operation from an input voltage supply range of 4.5 V to 5.5 V. The current capability
of the power supply must exceed the maximum current limit of the power switch.
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10 Layout
10.1 Layout Guidelines
•
•
•
•
TPS2511 placement. Place the TPS2511 near the USB output connector and at least 22-µF OUT pin filter
capacitor. Connect the exposed PowerPAD to the GND pin and to the system ground plane using a via array.
IN pin bypass capacitance. Place the 0.1-µF bypass capacitor near the IN pin and make the connection
using a low-inductance trace.
ILIM_SET pin connection. Current limit setpoint accuracy can be compromised by stray leakage from a
higher voltage source to the ILIM_SET pin. Ensure that there is adequate spacing between IN pin copper or
trace and ILIM_SET pin trace to prevent contaminant buildup during the PCB assembly process. The traces
routing the RILIM resistor to the device must be as short as possible to reduce parasitic effects on the current
limit accuracy.
DP and DM consideration. Route these traces as differential micro-strips. For DP and DM, there is no
internal IEC ESD cell, refer to application note Effective System ESD Protection Guidelines:TPS251x USB
Charging Port Controllers for these 2 pins' IEC ESD design guideline.
10.2 Layout Example
For the trace routing of DP and DM, no strictly request must route these traces as micro-strips with nominal
differential impedance of 90 Ω because no USB 2.0 high-speed data transmission on these data line. But
because there is no internal IEC ESD cell, TI recommends placing IEC ESD cell on DP and DM trace close to
USB connector.
Via to Bottom Layer Signal Ground Plane
Via to Bottom Layer Signal
1
8
2
7
3
6
4
5
Figure 33. Layout Recommendation
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11 Device and Documentation Support
11.1 Documentation Support
11.1.1 Related Documentation
For related documentation see the following:
Effective System ESD Protection Guidelines:TPS251x USB Charging Port Controllers (SLVA800)
11.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
11.3 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
11.4 Trademarks
PowerPAD, E2E are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
11.5 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
11.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
12 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
24
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Copyright © 2012–2016, Texas Instruments Incorporated
Product Folder Links: TPS2511
PACKAGE OPTION ADDENDUM
www.ti.com
17-Apr-2021
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
TPS2511DGN
ACTIVE
HVSSOP
DGN
8
80
RoHS & Green
NIPDAUAG
Level-2-260C-1 YEAR
-40 to 125
2511
TPS2511DGNR
ACTIVE
HVSSOP
DGN
8
2500
RoHS & Green
NIPDAUAG
Level-2-260C-1 YEAR
-40 to 125
2511
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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