TPS2511-Q1
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SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
USB Dedicated Charging Port Controller and Current Limiting Power Switch
Check for Samples: TPS2511-Q1
FEATURES
APPLICATIONS
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Qualified for Automotive Application
AEC-Q100 Qualified with the Following
Results:
– Device Temperature Grade 1: –40°C to
125°C Ambient Operating Temperature
Range
– Device HMB ESD Classification Level H2
– Device CDM ESD Classification Level C3B
Supports a DCP Shorting D+ to D–
Supports a DCP Applying 2.0 V on D+ and 2.7
V on D– (or 2.7 V on D+ and 2.0 V on D–)
Supports a DCP Applying 1.2 V on Data Lines
Automatically Switch D+ and D– Lines
Connections for an Attached Device
Hiccup Mode for Short-Circuit Protection
Provides CS Pin for USB Cable Compensation
Programmable Current Limit (ILIM_SET Pin)
80-mΩ typical High-Side MOSFET
Accurate ±10% Current-Limit at 2.3 A typical
Meets USB Power Switch Requirements
Drop-In and List of materials Compatible with
TPS2511
Operating Range: 4.5 V to 5.5 V
Available in MSOP, 8-Pin Package
UL Listed and CB File Number E169910
Vehicle USB Power Charger
AC-DC Wall Adapter with USB Port
Other USB Charger
Automotive Infotainment Systems
DESCRIPTION
The TPS2511-Q1 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 charging schemes:
• Divider DCP, required to apply 2.7 V on D+ and
2.0 V on D– or 2.0 V on D+ and 2.7 V on D–;
• BC1.2 DCP, required to short D+ to D–;
• 1.2 V on both D+ and D–.
The TPS2511-Q1 is a 80-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 3.80 V
typical or when an over-temperature protection
occurs during an overload condition. Accurate and
programmable current limit provides flexibility and
convenience for applications. The TPS2511-Q1
provides a CS pin for USB cable resistance
compensation and a EN pin to turn on and turn off
the device.
SIMPLIFIED APPLICATION
5.0 VOUT
5.0 V
TPS2511-Q1
GND
OUT
8
2
ILIM_SET
DM
7
3
IN
DP
6
4
CS
EN
5
VBUS
COUT
FB
PAD
DD+
GND
USB Connector
AC-to-DC Converter
or
Buck DC-to-DC
Converter
1
CUSB
RILIM
GND
Power Supply
UDG-13098
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated
TPS2511-Q1
SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ORDERING INFORMATION (1)
TA = TJ
PACKAGE
PINS
–40°C to 125°C
MSOP (DGN)
8
(1)
TRANSPORT
MEDIA
MINIMUM
QUANTITY
ORDERABLE
DEVICE
NUMBER
TOP-SIDE
MARKING
Tube
80
TPS2511QDGNQ1
2511Q
Tape and Reel
2500
TPS2511QDGNRQ1
2511Q
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
Over recommended junction temperature range, voltages are referenced to GND (unless otherwise noted)
MIN
MAX
Supply voltage range
IN
–0.3
7
Input voltage range
EN, ILIM_SET
–0.3
7
Voltage range
OUT, CS
–0.3
7
–7
7
DP output voltage, DM output voltage
–0.3
IN+0.3 or 5.7
DP input voltage, DM input voltage
–0.3
IN+0.3 or 5.7
IN to OUT
Continuous output sink current DP input current, DM input current
35
Continuous output source
current
35
DP output current, DM output current
Continuous output sink current CS
Continuous output source
current
10
ILIM_SET
V
mA
Internally limited
Human Body Model (HBM) QSS 009-105 (JESD22-A114A) and AECQ100 Classification Level H2
ESD rating
UNIT
2
Charging Device Model (CDM) QSS 009-147 (JESD22-C101B.01)
and AEC-Q100 500V Classification Level C3B
kV
750
Operating junction temperature, TJ
V
Internally limited
Storage temperature range, Tstg
–65
150
°C
THERMAL INFORMATION
THERMAL METRIC (1)
TPS2511-Q1
DGN (8 PINS)
θJA
Junction-to-ambient thermal resistance
65.2
θJCtop
Junction-to-case (top) thermal resistance
53.3
θJB
Junction-to-board thermal resistance
36.9
ψJT
Junction-to-top characterization parameter
3.9
ψJB
Junction-to-board characterization parameter
36.6
θJCbot
Junction-to-case (bottom) thermal resistance
13.4
(1)
2
UNITS
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
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SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
RECOMMENDED OPERATING CONDITIONS
voltages are referenced to GND (unless otherwise noted), positive current are into pins.
MIN
MAX
VIN
Input voltage of IN
4.5
5.5
V CS
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
I CS
Continuous sink current
IOUT
Continuous output current of OUT
RILIM_SET
A resistor of current-limit, ILIM_SET to GND
TJ
Operating junction temperature
UNIT
V
5.5
mA
2
2.2
A
16.9
750
kΩ
-40
125
ºC
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
80
125
IOUT = 2 A, –40ºC ≤ (TJ =TA) ≤ 85ºC
80
110
IOUT = 2 A, TJ =TA = 25ºC
80
89
1.0
1.5
0.35
0.5
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
POWER SWITCH
RDS(on)
Static drain-source on-state
resistance
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
IREV
Reverse leakage current
VOUT = 5.5 V, VIN = VEN = 0 V
Discharge resistance
VOUT = 4 V
mΩ
ms
0.2
DISCHARGE
RDCHG
CURRENT LIMIT
IOS
OUT short-circuit current limit
mA
Short-circuit response time (1)
VIN = 5.0 V, RL = 50 mΩ, 2 inches lead
length, See Figure 4
VOUT_SHORT
OUT voltage threshold of going
into hiccup mode
VIN = 5.0 V, RILIIM_SET = 210 kΩ
tOS_DEG
On time of hiccup mode (1)
VIN = 5.0 V, RL = 0
16
ms
tSC_TURN_OFF
Off time of hiccup mode (1)
VIN = 5.0 V, RL = 0
12
s
tIOS
1.5
µs
HICCUP MODE
3.6
3.8
4.1
V
UNDERVOLTAGE LOCKOUT
VUVLO
IN UVLO threshold voltage, rising
3.9
Hysteresis (1)
4.1
4.3
100
V
mV
SUPPLY CURRENT
IIN_OFF
Disabled, IN supply current
VEN = 0 V, VIN = 5.5 V,
–40ºC ≤ TJ ≤ 85ºC
0.1
5
IIN_ON
Enabled, IN supply current
VEN = VIN, RILIM_SET = 210 kΩ
180
230
(1)
µA
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
THERMAL SHUTDOWN
Temperature rising threshold (2)
Hysteresis
Not in current limit
155
In current limit
135
ºC
(2)
10
OUT CURRENT DETECTION
IHCC_TH
Load detection current threshold,
rising (2)
RILIM_SET = 22.1 kΩ
1060
RILIM_SET = 44.2 kΩ
560
IHCC_TH_HYS
Load detection current
Hysteresis (2)
RILIM_SET = 22.1 kΩ
230
RILIM_SET = 44.2 kΩ
120
V CS
CS output active low voltage (2)
I CS = 1 mA
CS deglitch time during turning on
tCS_EN
(2)
0
80
I CS = 1 mA
mA
mA
140
8
mV
ms
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
ton
OUT voltage turn-on time
toff
OUT voltage turn-off time
VEN = 0 V or VEN = 5.5 V
–0.5
CL = 1 µF, RL = 100 Ω, see Figure 1,
Figure 2
2.6
5
1.7
3
125
200
Ω
400
700
1300
kΩ
310
330
350
mV
ms
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
(2)
mV
DIVIDER MODE
VDP_2.7V
DP output voltage
VIN = 5.0 V
2.57
2.7
2.84
VDM_2.0V
DM output voltage
VIN = 5.0 V
1.9
2.0
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 = 5.0 V
1.12
1.2
1.28
VDM_1.2V
DM output voltage
VIN = 5.0 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
(2)
4
V
Specified by design. Not production tested.
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SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
OUT
50%
VEN
RL
50%
ton
CL
toff
90%
VOUT
Figure 1. Output Rise and Fall Test Load
10%
Figure 2. Enable Timing, Active High Enable
90%
IOS
VOUT
tr
IOUT
tf
10%
Figure 3. Power-On and Off
tIOS
Figure 4. Output Short-Circuit Parameters
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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
UDG-12097
6
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SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
DEVICE INFORMATION
DGN PACKAGE (MSOP)
8 PINS
(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, recommended 16.9 kΩ ≤ RILIM_SET ≤ 750 kΩ.
IN
3
P
Power supply. Input voltage connected to 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.
OUT
8
O
Power-switch output. Connect to VBUS of USB
G
Ground connection.
PowerPAD
(1)
G = Ground, I = Input, O = Output, P = Power
SPACER
SPACER
VIN
IOUT
TPS2511-Q1
100 kW
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
100 kW
RLOAD
CUSB
RILIM_SET
UDG-13100
Figure 5. Test Circuit for System Operation in Typical Characteristics Section
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TYPICAL CHARACTERISTICS
4.8
8
8
4
3.2
2
2.4
0
1.6
-2
0.8
0
-7m
-5m
Time - s
-3m
3.2
4
2.4
2
1.6
0
0.8
-2
CS
IOUT
OUT
EN
-6
-9m
6
-0.8
1m
-1m
-4
-4m
-2m
0
-0.8
3m
6
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 2.5 W
V IN = 5 V, C OUT = 22 m F, R L = 2.5 W
4
OUT, EN, DP, DM - V
4
2
0
2
0
DM
EN
OUT
DP
-2m
0
2m
4m
OUT
-2
-4m
6m
DP
-2m
DM
0
EN
2m
4m
Figure 8. Enable into 2.5-Ω Load
Figure 9. Disable with 2.5-Ω Load
8
4.8
8
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 2.5 W
4
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 2.5 W
6
3.2
2
2.4
0
1.6
-2
0.8
0
-4
OUT
-4m
-2m
0
-2m
-4m -6m
Time - s
6
3.2
4
2.4
2
1.6
0
0.8
-2
IOUT
VIN
-8m
VIN, OUT - V
4
IOUT - A
4
-6
-6m
6m
Time - s
Time - s
-10m -12m
0
OUT
-0.8
-14m
-4
-2m
IOUT - A
-2
-4m
VIN, OUT - V
4m
Figure 7. Turn off Delay and Fall Time With 22-µF Load
6
-1m
IOUT
VIN
0
1m
2m
-0.8
3m
Time - s
Figure 10. Power Up – Enabled
8
2m
Time - s
Figure 6. Turn on Delay and Rise Time With 22-µF Load
OUT, EN, DP, DM - V
0
CS
IOUT
OUT
EN
IOUT - A
4
OUT, EN, CS - V
6
-4
4
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 2.5 W
IOUT - A
OUT, EN, CS - V
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 2.5 W
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Figure 11. Power Down – Enabled
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TYPICAL CHARACTERISTICS (continued)
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
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
-6
-10m
0
8
-0.8
40m
30m
Figure 13. Enable into 1.83-ΩLoad
3
7
4
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 1 W
6
3.2
4
2.4
2
1.6
EN, DP, DM - V
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W , R L = 0 W
IOUT - A
6
2.5
4
1.5
2
0.5
0
-0.5
0.8
0
-2
0
NE
OUT
-4
-15m
-10m
-5m
0
5m
10m
Time - s
IOUT
CS
15m
25m
20m
IOUT
-0.8
-10m
30m
-5m
0
Figure 14. Enable into 1-Ω Load
DP
DM
5m
10m
15m 20m
Time - s
25m
30m
35m
-1.5
40m
Figure 15. 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
0
0
Time - s
0.0002
0.0004
0
-2
-2
-7
-3
IOUT
VIN
OUT
-0.8
-0.0002
OUT, EN - V
4.5
3
IOUT - A
6
4.5
-3
-0.0004
EN
-2
IOUT - A
OUT, EN, CS - V
20m
Time - s
Figure 12. Inrush Current with Different Capacitance Load
VIN, OUT, CS - V
10m
0
CS
IOUT
OUT
EN
IOUT - A
-4
OUT, EN, CS - V
6
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
1
5
-3
9
13
Time - s
Figure 16. 1-Ω Load Applied
Figure 17. Hiccup Mode While Enabled into 1-Ω Load
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TYPICAL CHARACTERISTICS (continued)
6
3
3.2
VDM
2
2
1
0
0
IOUT
CS
-2
-220m
-120m
-20m
80m
DP and DM Output Voltage - V
4
IOUT - A
CS - V
V IN = 5 V, C OUT = 22 m F, R ILIM_SET = 22.1 k W
2.4
2
-20
0
Time - s
Figure 18. Output Current Sensing Report
20
40
60
80
TJ - Junction Temperature - °C
100
120
Figure 19. DP and DM Output Voltage vs Temperature
230
2.4
V IN = 5 V, R ILIM_SET = 16.9 k W
V IN = 5 V
Supply Current, Enabled - mA
Supply Current, Disabled - mA
V IN = 5 V
2.8
1.6
-40
-1
280m
180m
VDP
1.6
0.8
0
210
190
170
R ILIM = 16.9 k W
R ILIM = 210 k W
-2
-40
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
150
-40
120
Figure 20. Supply Current Disabled vs Temperature
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
120
Figure 21. Supply Current Enabled vs Temperature
3
120
V IN = 5 V
R ILIM_SET = 20 k W
R ILIM_SET = 22.1 k W
V IN = 5 V, I OUT = 2 A
2.8
RDS(ON) - mW
ICC - Current Limit - A
100
2.6
2.4
80
60
2.2
2
-40
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
Figure 22. Current Limit vs Temperature
10
120
40
-40
-20
0
20
40
60
80
TJ - Junction Temperature - °C
100
120
Figure 23. Power Switch On-Resistance (RDS(ON)) vs
Temperature
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TPS2511-Q1
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SLUSBK5A – JUNE 2013 – REVISED JUNE 2013
DETAILED DESCRIPTION
Overview
The following overview references various industry standards. It is always recommended to consult 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 guarantee the total
current draw does not exceed 500 mA. The TPS2511-Q1 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-Q1 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 shows different port operating modes according to the BC1.2 Specification.
Table 1. Operating Modes Table
PORT TYPE
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
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 0.3V 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 0.3V and less than 0.8 V.
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.
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 should be shorted together with a maximum series impedance of 200 Ω. This is
shown in Figure 24.
VBUS
USB Connector
VBUS
5.0 V
D−
200 W (max )
D+
GND
GND
UDG-12100
Figure 24. DCP Short Mode
Divider1 (DCP Applying 2.0 V on D+ Line and 2.7 V on D– Line) or Divider2 (DCP Applying 2.7 V on D+
Line and 2.0 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 25 and Figure 26. The Divider1 charging scheme is used for 5-W adapters, Divider1 applies 2.0
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 2.0 V is applied on the D– line.
VBUS
VBUS
VBUS
D+
2.7 V 2.0 V
+
+
–
–
GND
GND
D−
D+
2.0 V 2.7 V
+
+
–
–
UDG-12101
Figure 25. Divider1 DCP
GND
GND
USB Connector
D−
12
VBUS
5.0 V
USB Connector
5.0 V
UDG-12102
Figure 26. Divider2 DCP
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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.
VBUS
D−
200 W (max)
D+
GND
+
–
USB Connector
VBUS
5.0 V
1.2 V
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 shortcircuits 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 shortcircuit 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 VBUS 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 BC1.2compliant 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.
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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-Q1
GND
UDG-13101
Figure 28. TPS2511-Q1 DCP Auto-Detect Functional Diagram
Overcurrent Protection
During an overload condition, the TPS2511-Q1 maintains a constant output current and reduces the output
voltage accordingly. If the output voltage falls below 3.8 V for 16 ms, the TPS2511-Q1 turns off the output for a
period of 12 seconds as shown in Figure 29. 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 29. 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-Q1 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).
14
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Current-Limit Threshold
The TPS2511-Q1 has a current-limiting threshold that is externally programmed with a resistor. Equation 1 and
Figure 30 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 30. Typical Current Limit vs Programming Resistor
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.
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 turn-on 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.
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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 TPS2511Q1 power switch blocks current from the OUT pin to the IN pin when turned off by the UVLO or disabled. The
TPS2511-Q1 includes an output discharge function. A 500-Ω (typ.) 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.
Thermal Sense
The TPS2511-Q1 provides thermal protection from two independent thermal sensing circuits that monitor the
operating temperature of the power distribution switch and turn off for 12 seconds (typ) if the temperature
exceeds recommended operating conditions. The device operates in constant-current mode during an overcurrent condition and OUT pin voltage is above 3.8 V (typ), 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 over-current 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.
16
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APPLICATION INFORMATION
Programming the Current Limit Threshold
The user-programmable RILIM resistor on the ILIMIT_SET pin sets the current limit. The TPS2511-Q1 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
between 16.9 kΩ and 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 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. The Equation 2 and Equation 3
calculate the resulting overcurrent thresholds for a given external resistor value (RILIM). The traces routing the
RILIM resistor to the TPS2511-Q1 should be as short as possible to reduce parasitic effects on the current limit
accuracy. The equations and the graph below 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
(2)
xxxxxx
IOS_MAX =
51228
0.967
RILIM
where
•
•
IOS_MAX is in mA
RILIM is in kΩ
600m
VIN = 5 V
3
OUT Short Circuit Current Limit - A
OUT Short Circuit Current Limit - A
3.6
(3)
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 31. Current Limit Threshold vs Current
Limit Resistance
VIN = 5 V
IOS_TYP
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 32. Current Limit Threshold vs Current
Limit Resistance
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Current Limit Setpoint Example
In the following example, choose the ILIM_SET resistor to ensure that TPS2511-Q1 does not trip off under worst
case conditions of current limit and resistor tolerance (assume 1% resistor tolerance). For this example, IOS_MIN =
2100 mA.
51228
IOS _ MIN =
= 2100 mA
RILIM1.03
(4)
1
1
æ 51228 ö1.03 æ 51228 ö1.03
÷
=ç
= 22.227 kW
RILIM = ç
÷
ç IOS _ MIN ÷
è 2100 ø
è
ø
(5)
Including resistor tolerance, target nominal resistance value:
22.227 kW
RILIM =
= 22.007 kW
1.01 kW
(6)
Choose:
RILIM = 22.0 kΩ
(7)
VBUS Voltage Drop Compensation
Figure 33 shows a USB charging design using the TPS2511-Q1. In general VBUS has some voltage loss due to
USB cable resistance and TPS2511-Q1 power switch on-state resistance. The sum of voltage loss is likely
several hundred millivolts from 5VOUT to VPD_IN that is the input voltage of PD while the high charging current
charges the PD. For example, in Figure 34, assuming that the loss resistance is 170 mΩ (includes 100 mΩ of
USB cable resistance and 70 mΩ of power switch resistance) and 5VOUT is 5.0 V, the input voltage of PD (VPD_IN)
is about 4.66 V at 2.0 A. (see Figure 34)
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-Q1 provides
CS pin to report the high charging current for USB chargers to increase the 5VOUT voltage. This is shown by the
solid lines of Figure 34.
5VOUT
5.0 V
VPD_IN
100 kW
R1
TPS2511-Q1
IOUT
COUT
R2
GND
OUT
8
2
ILIM_SET
DM
7
3
IN
DP
6
4
CS
EN
5
VBUS
D-
R4
FB
PAD
D+
GND
USB Connector
AC-to-DC Converter
or
Buck DC-to-DC
Converter
1
IOUT
Portable Device
Cable
CUSB
0.1 mF
R3
RILIM
GND
Power Supply
UDG-13099
Figure 33. TPS2511-Q1 Charging System Schematic Diagram
18
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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 34. TPS2511-Q1 CS Function
Equation 8 through Equation 11 refer to Figure 33.
The power supply output voltage is calculated in Equation 8.
(R1 + R 2 + R 3 )´ VFB
5 VOUT =
R3
(8)
5VOUT and VFB are known. If R3 is given and R1 is fixed, R2 can be calculated. The 5VOUT voltage change with
compensation is shown in Equation 9 and Equation 10.
(R 2 + R 3 )´ R1 ´ VFB
DV =
R3 ´ R4
(9)
æ 5V
R öR ´V
ΔV = ç OUT - 1 ÷ 1 FB
R3 ø R4
è VFB
(10)
If R1 is less than R3, then Equation 10 can be simplified as Equation 11.
5VOUT ´ R1
DV »
R4
(11)
Divide Mode Selection of 5-W and 10-W USB Chargers
The TPS2511-Q1 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 37 and Figure 38. It is necessary to apply DP and DM to D+ and D– of USB
connector for 10-W USB chargers. See Figure 35 and Figure 36. 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
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-Q1
5
4
2
OUT
IN
EN
DM
CS
DP
ILIM_SET
GND
8
7
6
1
VBUS
DD+
GND
TPS2511-Q1
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-13102
UDG-13103
Figure 35. 10-W USB Charger Application
with Power Switch
Figure 36. 10-W USB Charger Application
without Power Switch
TPS2511-Q1
5
4
2
OUT
IN
EN
DM
CS
DP
ILIM_SET
GND
8
7
6
1
VBUS
DD+
GND
TPS2511-Q1
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-13104
UDG-13105
Figure 37. 5-W USB Charger Application
with Power Switch
Figure 38. 5-W USB Charger Application
without Power Switch
Layout Guidelines
•
•
•
20
TPS2511-Q1 placement. Place the TPS2511-Q1 near the USB output connector and at lest 22-µF OUT pin
filter capacitor. Connect the exposed Power PAD 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 set point 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/trace and ILIM_SET pin trace to prevent contaminant buildup during the PCB assembly process. The
traces routing the RILIM resistor to the device should be as short as possible to reduce parasitic effects on the
current-limit accuracy.
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PACKAGE OPTION ADDENDUM
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10-Dec-2020
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)
TPS2511QDGNQ1
ACTIVE
HVSSOP
DGN
8
80
RoHS & Green
NIPDAUAG
Level-2-260C-1 YEAR
-40 to 125
2511Q
TPS2511QDGNRQ1
ACTIVE
HVSSOP
DGN
8
2500
RoHS & Green
NIPDAUAG
Level-2-260C-1 YEAR
-40 to 125
2511Q
(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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