TPS2065-Q1 [TI]
高电平有效且具有输出放电功能的汽车类 1A 负载、2.7-5.5V、70mΩ USB 电源开关;
| 型号： | TPS2065-Q1 |
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TEXAS INSTRUMENTS |
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TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
Check for Samples: TPS2062-Q1, TPS2065-Q1
1
FEATURES
2
•
•
•
•
•
Qualified for Automotive Applications
•
•
•
•
Bidirectional Switch
70-mΩ High-Side MOSFET
Ambient Temperature Range: -40°C to 125°C
Built-in Soft-Start
1-A Continuous Current
Thermal and Short-Circuit Protection
UL Listed - File No. E169910
Accurate Current Limit
(1.1 A min, 1.9 A max)
APPLICATIONS
•
•
Heavy Capacitive Loads
Short-Circuit Protections
•
•
•
•
•
•
Operating Range: 2.7 V to 5.5 V
0.6-ms Typical Rise Time
Undervoltage Lockout
TPS2062-Q1
DGN PACKAGE
(TOP VIEW)
TPS2065-Q1
DGN PACKAGE
(TOP VIEW)
Deglitched Fault Report (OC)
No OC Glitch During Power Up
1-μA Maximum Standby Supply Current
GND
IN
GND
IN
1
2
3
4
8
7
6
5
OC1
1
2
3
4
8
7
6
5
OUT
OUT
OUT
OUT1
OUT2
IN
EN1
EN2
OC2
OC
EN or EN
All enable inputs are active high or low.
DESCRIPTION
The TPS2062/5-Q1 power-distribution switch is intended for applications where heavy capacitive loads and
short-circuits are likely to be encountered. This device incorporates 70-mΩ N-channel MOSFET power switches
for power-distribution systems that require multiple power switches in a single package. Each switch is controlled
by a logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch
rise times and fall times to minimize current surges during switching. The charge pump requires no external
components and allows operation from supplies as low as 2.7 V.
When the output load exceeds the current-limit threshold or a short is present, the device limits the output current
to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When
continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction
temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal
shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains
off until valid input voltage is present. This power-distribution switch is designed to set current limit at 1.5 A
typically.
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.
2
PowerPAD is a trademark of Texas Instruments.
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 © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
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.
ORDERING INFORMATION(1)
TA
PACKAGE(2)
MSOP – DGN
VSSOP - DGN
ORDERABLE PART NUMBER
TOP-SIDE MARKING
Reel of 2500
Reel of 2500
TPS2062QDGNRQ1
PSOQ
PTLQ
–40°C to 125°C
TPS2065QDGNRQ1
(1) 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.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
(2)
Input voltage range, VI(IN)
-0.3 V to 6 V
-0.3 V to 6 V
-0.3 V to 6 V
-0.3 V to 6 V
Internally limited
See Dissipation Rating Table
-40°C to 150°C
-65°C to 150°C
2 kV
Output voltage range(2), VO(OUTx)
Input voltage range, VI(ENx)
Voltage range, VI(OCx)
Continuous output current, IO(OUTx)
Continuous total power dissipation
Operating virtual junction temperature range, TJ
Storage temperature range, Tstg
Human body model (HBM)
Electrostatic discharge (ESD) protection
Charge device model (CDM)
Machine model (MM)
1000 V
100 V
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to GND.
DISSIPATING RATING TABLE
T
A ≤ 25°C
DERATING FACTOR
ABOVE TA = 25°C
TA = 125°C
POWER RATING
PACKAGE
POWER RATING
DGN-8
2.14 W
17.123 mW/°C
428 mW
RECOMMENDED OPERATING CONDITIONS
MIN
2.7
0
MAX
5.5
5.5
1
UNIT
V
Input voltage, VI(IN)
Input voltage, VI(ENx)
V
Continuous output current, IO(OUTx)
Ambient temperature, TA
0
A
-40
-40
125
150
°C
°C
Operating virtual junction temperature, TJ
2
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
ELECTRICAL CHARACTERISTICS
over recommended operating junction temperature range, VI(IN) = 5.5 V, IO = 1 A, VI(ENx) = 0 V (unless otherwise noted)
PARAMETER
POWER SWITCH
Static drain-source on-state
TEST CONDITIONS(1)
MIN
TYP
MAX
UNIT
resistance, 5-V operation and 3.3- VI(IN) = 5 V or 3.3 V, IO = 1 A, -40°C ≤ TA ≤ 125°C
V operation
70
75
135
150
mΩ
rDS(on)
Static drain-source on-state
VI(IN) = 2.7 V, IO = 1 A, -40°C ≤ TA ≤ 125°C
resistance, 2.7-V operation(2)
mΩ
VI(IN) = 5.5 V
0.6
0.4
1.5
1
tr
tf
Rise time, output
Fall time, output
CL = 1 μF, RL = 5 Ω, TA = 25°C
CL = 1 μF, RL = 5 Ω, TA = 25°C
ms
VI(IN) = 2.7 V
VI(IN) = 5.5 V
VI(IN) = 2.7 V
0.05
0.05
0.5
0.5
ms
ENABLE INPUT EN OR EN
VIH
VIL
II
High-level input voltage
2.7 V ≤ VI(IN) ≤ 5.5 V
2.7 V ≤ VI(IN) ≤ 5.5 V
VI(ENx) = 0 V or 5.5 V
CL = 100 μF, RL = 5 Ω
CL = 100 μF, RL = 5 Ω
2
V
Low-level input voltage
Input current
0.8
1
-1
μA
ms
ton
toff
Turnon time
3
Turnoff time
10
CURRENT LIMIT
TA = 25°C
1.1
1.1
1.6
1.5
1.5
2.3
1.9
2.1
2.9
VI(IN) = 5 V, OUT connected to GND,
Device enabled into short-circuit
IOS
Short-circuit output current(1)
A
A
-40°C ≤ TA ≤ 125°C
IOC_TRIP
Overcurrent trip threshold
VI(IN) = 5 V, current ramp (≤ 100 A/s) on OUT
SUPPLY CURRENT (TPS2062-Q1)
TA = 25°C
0.5
0.5
50
50
1
1
5
Supply current, low-level output
No load on OUT, VI(ENx) = 5.5 V
No load on OUT, VI(ENx) = 0 V
μA
μA
-40°C ≤ TA ≤ 125°C
TA = 25°C
70
90
Supply current, high-level output
-40°C ≤ TA ≤ 125°C
-40°C ≤ TA ≤ 125°C
TA = 25°C
Leakage current
OUT connected to ground, VI(ENx) = 5.5 V
VI(OUTx) = 5.5 V, IN = ground
μA
μA
Reverse leakage current
SUPPLY CURRENT (TPS2065-Q1)
0.2
TA = 25°C
0.5
0.5
43
1
5
No load on OUT, VI(ENx) = 5.5 V,
or VI(ENx) = 0 V
Supply current, low-level output
μA
μA
-40°C ≤ TA ≤ 125°C
TA = 25°C
60
70
No load on OUT, VI(ENx) = 0 V,
or VI(ENx) = 5.5 V
Supply current, high-level output
Leakage current
-40°C ≤ TA ≤ 125°C
43
OUT connected to ground, VI(EN) = 5.5 V,
or VI(EN) = 0 V
-40°C ≤ TA ≤ 125°C
1
0
μA
μA
Reverse leakage current
UNDERVOLTAGE LOCKOUT
Low-level input voltage, IN
Hysteresis, IN
VI(OUTx) = 5.5 V, IN = ground
TA = 25°C
2
4
2.5
V
TA = 25°C
75
8
mV
OVERCURRENT OC1 and OC2
Output low voltage, VOL(OCx)
Off-state current
IO(OCx) = 5 mA
0.4
1
V
VO(OCx) = 5 V or 3.3 V
OCx assertion or deassertion
μA
ms
OC deglitch(2)
15
THERMAL SHUTDOWN(3)
Thermal shutdown threshold
Recovery from thermal shutdown
Hysteresis
135
125
°C
°C
°C
10
(1) Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account
separately.
(2) Not tested in production, specified by design.
(3) The thermal shutdown only reacts under overcurrent conditions.
Copyright © 2011–2012, Texas Instruments Incorporated
3
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
DEVICE INFORMATION
Pin Functions - TPS2062-Q1
PINS
DESCRIPTION
TPS2062-Q1
I/O
NAME
EN1
EN2
EN1
EN2
GND
IN
NO.
3
I
I
I
I
Enable input, logic low turns on power switch IN-OUT1
Enable input, logic low turns on power switch IN-OUT2
Enable input, logic high turns on power switch IN-OUT1
Enable input, logic high turns on power switch IN-OUT2
Ground
4
-
-
1
2
I
Input voltage
OC1
OC2
OUT1
OUT2
8
O
O
O
O
Overcurrent, open-drain output, active low, IN-OUT1
Overcurrent, open-drain output, active low, IN-OUT2
Power-switch output, IN-OUT1
5
7
6
Power-switch output, IN-OUT2
Internally connected to GND; used to heat-sink the part to the circuit board traces. Should be
connected to GND pin.
PowerPAD™
-
Functional Block Diagram - TPS2062-Q1
A. Current sense
B. Active low (EN) for TPS2062-Q1
4
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
Pin Functions - TPS2065-Q1
PINS
TPS2065-Q1
DESCRIPTION
I/O
NAME
EN
NO.
-
I
I
Enable input, logic low turns on power switch IN-OUT1
Enable input, logic high turns on power switch IN-OUT1
Ground
EN
4
GND
IN
1
2, 3
5
I
Input voltage
OC
O
O
Overcurrent, open-drain output, active low, IN-OUT1
Power-switch output, IN-OUT1
OUT
6, 7, 8
Internally connected to GND; used to heat-sink the part to the circuit board traces. Should be
connected to GND pin.
PowerPAD™
-
Functional Block Diagram - TPS2065-Q1
A. Current sense
B. Active high (EN) for TPS2065-Q1
Copyright © 2011–2012, Texas Instruments Incorporated
5
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
PARAMETER MEASUREMENT INFORMATION
OUT
t
f
t
r
R
L
C
L
V
90%
10%
O(OUT)
90%
10%
TEST CIRCUIT
50%
90%
50%
50%
50%
V
V
I(EN)
I(EN)
t
off
t
off
t
on
t
on
90%
V
V
O(OUT)
O(OUT)
10%
10%
VOLTAGE WAVEFORMS
Figure 1. Test Circuit and Voltage Waveforms
R
C
T
A
= 5 W,
= 1 mF
= 255C
L
L
V
V
I(EN)
I(EN)
5 V/div
5 V/div
R = 5 W,
L
V
O(OUT)
C = 1 mF
L
2 V/div
T
A
= 255C
V
O(OUT)
2 V/div
t − Time − 500 ms/div
t − Time − 500 ms/div
Figure 2. Turnon Delay and Rise Time With 1-μF
Figure 3. Turnoff Delay and Fall Time With 1-μF
Load
Load
6
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
PARAMETER MEASUREMENT INFORMATION (continued)
R = 5 W,
L
C = 100 mF
V
L
I(EN)
V
I(EN)
T
= 255C
5 V/div
A
5 V/div
R = 5 W,
L
V
O(OUT)
C = 100 mF
L
2 V/div
T
A
= 255C
V
O(OUT)
2 V/div
t − Time − 500 ms/div
t − Time − 500 ms/div
Figure 4. Turnon Delay and Rise Time With 100-μF Figure 5. Turnoff Delay and Fall Time With 100-μF
Load
Load
V
IN
= 5 V
R = 5 W,
L
V
I(EN)
V
T
= 255C
I(EN)
A
5 V/div
5 V/div
220 mF
470 mF
I
O(OUT)
I
O(OUT)
100 mF
500 mA/div
500 mA/div
t − Time − 500 ms/div
t − Time − 1 ms/div
Figure 6. Short-Circuit Current,
Device Enabled Into Short
Figure 7. Inrush Current With Different
Load Capacitance
Copyright © 2011–2012, Texas Instruments Incorporated
7
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
V
O(OC)
V
O(OC)
2 V/div
2 V/div
I
O(OUT)
I
O(OUT)
1 A/div
1 A/div
t − Time − 2 ms/div
t − Time − 2 ms/div
Figure 8. 2-Ω Load Connected to Enabled Device
Figure 9. 1-Ω Load Connected to Enabled Device
TYPICAL CHARACTERISTICS
TURNON TIME
vs
TURNOFF TIME
vs
INPUT VOLTAGE
INPUT VOLTAGE
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
2
C = 100 mF,
C = 100 mF,
L
L
R = 5 W,
R = 5 W,
L
L
T
A
= 255C
T
A
= 255C
1.9
1.8
1.7
1.6
1.5
0.1
0
2
3
4
5
6
2
3
4
5
6
V − Input Voltage − V
I
V − Input Voltage − V
I
Figure 10.
Figure 11.
8
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
TYPICAL CHARACTERISTICS (continued)
RISE TIME
vs
FALL TIME
vs
INPUT VOLTAGE
INPUT VOLTAGE
0.25
0.2
0.6
C
R
T
= 1 mF,
= 5 W,
= 255C
C
R
T
= 1 mF,
= 5 W,
= 255C
L
L
L
L
A
A
0.5
0.4
0.15
0.1
0.3
0.2
0.05
0
0.1
0
2
3
4
5
6
2
3
4
5
6
V − Input Voltage − V
I
V − Input Voltage − V
I
Figure 12.
Figure 13.
TPS2062-Q1
TPS2065-Q1
SUPPLY CURRENT, OUTPUT ENABLED
SUPPLY CURRENT, OUTPUT ENABLED
vs
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
60
50
40
30
20
70
V = 5.5 V
I
V = 5.5 V
I
60
50
40
30
20
10
0
V = 5 V
I
V = 5 V
I
V = 3.3 V
I
V = 2.7 V
I
V = 2.7 V
I
V = 3.3 V
I
10
0
−50
0
50
100
150
−50
0
50
100
150
T − Junction Temperature − 5C
J
T − Junction Temperature − 5C
J
Figure 14.
Figure 15.
Copyright © 2011–2012, Texas Instruments Incorporated
9
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
TYPICAL CHARACTERISTICS (continued)
TPS2062-Q1
SUPPLY CURRENT, OUTPUT DISABLED
vs
TPS2065-Q1
SUPPLY CURRENT, OUTPUT DISABLED
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
0.5
0.45
0.4
0.5
V = 5.5 V
I
V = 5.5 V
I
0.45
V = 5 V
I
0.4
0.35
0.3
V = 5 V
I
0.35
0.3
V = 3.3 V
I
V = 3.3 V
I
V = 2.7 V
I
V = 2.7 V
I
0.25
0.2
0.25
0.2
0.15
0.1
0.15
0.1
0.05
0.05
0
0
−50
0
50
100
150
−50
0
50
100
150
T − Junction Temperature − 5C
J
T − Junction Temperature − 5C
J
Figure 16.
Figure 17.
STATIC DRAIN-SOURCE ON-STATE RESISTANCE
SHORT-CIRCUIT OUTPUT CURRENT
vs
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
120
100
80
60
40
20
0
1.56
1.54
1.52
1.5
V = 2.7 V
I
I
O
= 0.5 A
Out1 = 5 V
V = 3.3 V
I
Out1 = 3.3 V
Out1 = 2.7 V
1.48
1.46
1.44
1.42
1.4
V = 5 V
I
V = 5.5 V
I
1.38
1.36
1.34
−50
0
50
100
150
−50
0
50
100
150
T − Junction Temperature − 5C
J
T − Junction Temperature − 5C
J
Figure 18.
Figure 19.
10
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
TYPICAL CHARACTERISTICS (continued)
THRESHOLD TRIP CURRENT
UNDERVOLTAGE LOCKOUT
vs
vs
INPUT VOLTAGE
JUNCTION TEMPERATURE
2.3
2.5
UVLO Rising
T
A
= 255C
Load Ramp = 1A/10 ms
2.26
2.3
2.1
1.9
1.7
1.5
2.22
2.18
UVLO Falling
2.14
2.1
−50
0
50
100
150
2.5
3
3.5
4
4.5
5
5.5
6
T − Junction Temperature − 5C
J
V − Input Voltage − V
I
Figure 20.
Figure 21.
CURRENT-LIMIT RESPONSE
vs
PEAK CURRENT
200
150
100
V = 5 V,
I
T
= 255C
A
50
0
0
2.5
5
7.5
10
12.5
Peak Current − A
Figure 22.
Copyright © 2011–2012, Texas Instruments Incorporated
11
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
APPLICATION INFORMATION
POWER-SUPPLY CONSIDERATIONS
TPS2062
2
Power Supply
2.7 V to 5.5 V
IN
7
6
Load
Load
OUT1
0.1 µF
0.1 µF
0.1 µF
22 µF
22 µF
8
OC1
EN1
OC2
3
5
OUT2
4
EN2
GND
1
Figure 23. Typical Application
A 0.01-μF to 0.1-μF ceramic bypass capacitor between IN and GND, close to the device, is recommended.
Placing a high-value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy.
This precaution reduces power-supply transients that may cause ringing on the input. Additionally, bypassing the
output with a 0.01-μF to 0.1-μF ceramic capacitor improves the immunity of the device to short-circuit transients.
OVERCURRENT
A sense FET is employed to check for overcurrent conditions. Unlike current-sense resistors, sense FETs do not
increase the series resistance of the current path. When an overcurrent condition is detected, the device
maintains a constant output current and reduces the output voltage accordingly. Complete shutdown occurs only
if the fault is present long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted before the
device is enabled or before VI(IN) has been applied (see Figure 14). The TPS206x-Q1 senses the short and
immediately switches into a constant-current output.
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 a short period of time before the current-limit circuit can react. After the
current-limit circuit has tripped (reached the overcurrent trip threshold), the device switches into constant-current
mode.
In the third condition, the load has been gradually increased beyond the recommended operating current. The
current is permitted to rise until the current-limit threshold is reached or until the thermal limit of the device is
exceeded (see Figure 16). The TPS2065-Q1 and TPS2062-Q1 are capable of delivering current up to the
current-limit threshold without damaging the device. Once the threshold has been reached, the device switches
into its constant-current mode.
OC RESPONSE
The OCx open-drain output is asserted (active low) when an overcurrent or overtemperature shutdown condition
is encountered after a 10-ms deglitch timeout. The output remains asserted until the overcurrent or
overtemperature condition is removed. Connecting a heavy capacitive load to an enabled device can cause a
momentary overcurrent condition; however, no false reporting on OCx occurs due to the 10-ms deglitch circuit.
The TPS2065-Q1 and TPS2062-Q1 are designed to eliminate false overcurrent reporting. The internal
overcurrent deglitch eliminates the need for external components to remove unwanted pulses. OCx is not
deglitched when the switch is turned off due to an overtemperature shutdown.
12
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
V+
R
pullup
TPS2062
GND
OC1
OUT1
OUT2
OC2
IN
EN1
EN2
Figure 24. Typical Circuit for the OC Pin
POWER DISSIPATION AND JUNCTION TEMPERATURE
The low on-resistance on the N-channel MOSFET allows the small surface-mount packages to pass large
currents. The thermal resistances of these packages are high compared to those of power packages; it is good
design practice to check power dissipation and junction temperature. Begin by determining the rDS(on) of the N-
channel MOSFET relative to the input voltage and operating temperature. As an initial estimate, use the highest
operating ambient temperature of interest and read rDS(on) from Figure 18. Using this value, the power dissipation
per switch can be calculated by:
•
PD = rDS(on)× I2
Multiply this number by the number of switches being used. This step renders the total power dissipation from
the N-channel MOSFETs.
The thermal resistance, RθJA = 1 / (DERATING FACTOR), where DERATING FACTOR is obtained from the
Dissipation Ratings Table. Thermal resistance is a strong function of the printed circuit board construction , and
the copper trace area connecting the integrated circuit.
Finally, calculate the junction temperature:
•
TJ = PD x RθJA + TA
Where:
•
•
•
TA= Ambient temperature °C
θJA = Thermal resistance
PD = Total power dissipation based on number of switches being used.
R
Compare the calculated junction temperature with the initial estimate. If they do not agree within a few degrees,
repeat the calculation, using the calculated value as the new estimate. Two or three iterations are generally
sufficient to get a reasonable answer.
THERMAL PROTECTION
Thermal protection prevents damage to the IC when heavy-overload or short-circuit faults are present for
extended periods of time. The TPS2065-Q1 and TPS2062-Q1 implement a thermal sensing to monitor the
operating junction temperature of the power distribution switch. In an overcurrent or short-circuit condition, the
junction temperature rises due to excessive power dissipation. Once the die temperature rises above a minimum
of 135°C due to overcurrent conditions, the internal thermal sense circuitry turns the power switch off, thus
preventing the power switch from damage. Hysteresis is built into the thermal sense circuit, and after the device
has cooled approximately 10°C, the switch turns back on. The switch continues to cycle in this manner until the
load fault or input power is removed. The OCx open-drain output is asserted (active low) when an
overtemperature shutdown or overcurrent occurs.
Copyright © 2011–2012, Texas Instruments Incorporated
13
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
UNDERVOLTAGE LOCKOUT (UVLO)
An undervoltage lockout ensures that the power switch is in the off state at power up. Whenever the input
voltage falls below approximately 2 V, the power switch is quickly turned off. This facilitates the design of hot-
insertion systems where it is not possible to turn off the power switch before input power is removed. The UVLO
also keeps the switch from being turned on until the power supply has reached at least 2 V, even if the switch is
enabled. On reinsertion, the power switch is turned on, with a controlled rise time to reduce EMI and voltage
overshoots.
UNIVERSAL SERIAL BUS (USB) APPLICATIONS
The universal serial bus (USB) interface is a 12-Mb/s, or 1.5-Mb/s, multiplexed serial bus designed for low-to-
medium bandwidth PC peripherals (e.g., keyboards, printers, scanners, and mice). The four-wire USB interface is
conceived for dynamic attach-detach (hot plug-unplug) of peripherals. Two lines are provided for differential data,
and two lines are provided for 5-V power distribution.
USB data is a 3.3-V level signal, but power is distributed at 5 V to allow for voltage drops in cases where power
is distributed through more than one hub across long cables. Each function must provide its own regulated 3.3 V
from the 5-V input or its own internal power supply.
The USB specification defines the following five classes of devices, each differentiated by power-consumption
requirements:
•
•
•
•
•
Hosts/self-powered hubs (SPH)
Bus-powered hubs (BPH)
Low-power, bus-powered functions
High-power, bus-powered functions
Self-powered functions
SPHs and BPHs distribute data and power to downstream functions. The TPS2065-Q1 and TPS2062-Q1 have
higher current capability than required by one USB port; so, it can be used on the host side and supplies power
to multiple downstream ports or functions.
HOST/SELF-POWERED AND BUS-POWERED HUBS
Hosts and SPHs have a local power supply that powers the embedded functions and the downstream ports (see
Figure 25). This power supply must provide from 5.25 V to 4.75 V to the board side of the downstream
connection under full-load and no-load conditions. Hosts and SPHs are required to have current-limit protection
and must report overcurrent conditions to the USB controller. Typical SPHs are desktop PCs, monitors, printers,
and stand-alone hubs.
14
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
Downstream
USB Ports
D+
D−
V
BUS
0.1 µF
33 µF
GND
Power Supply
3.3 V
5 V
D+
D−
TPS2062
2
8
IN
7
V
BUS
OUT1
0.1 µF
0.1 µF
33 µF
GND
OC1
EN1
OC2
EN2
3
5
USB
Controller
D+
D−
4
6
V
BUS
OUT2
0.1 µF
33 µF
GND
GND
1
D+
D−
V
BUS
0.1 µF
33 µF
GND
Figure 25. Typical Four-Port USB Host / Self-Powered Hub
BPHs obtain all power from upstream ports and often contain an embedded function. The hubs are required to
power up with less than one unit load. The BPH usually has one embedded function, and power is always
available to the controller of the hub. If the embedded function and hub require more than 100 mA on power up,
the power to the embedded function may need to be kept off until enumeration is completed. This can be
accomplished by removing power or by shutting off the clock to the embedded function. Power switching the
embedded function is not necessary if the aggregate power draw for the function and controller is less than one
unit load. The total current drawn by the bus-powered device is the sum of the current to the controller, the
embedded function, and the downstream ports, and it is limited to 500 mA from an upstream port.
LOW-POWER BUS-POWERED AND HIGH-POWER BUS-POWERED FUNCTIONS
Both low-power and high-power bus-powered functions obtain all power from upstream ports; low-power
functions always draw less than 100 mA; high-power functions must draw less than 100 mA at power up and can
draw up to 500 mA after enumeration. If the load of the function is more than the parallel combination of 44 Ω
and 10 μF at power up, the device must implement inrush current limiting (see Figure 26). With TPS2065-Q1 and
TPS2062-Q1, the internal functions could draw more than 500 mA, which fits the needs of some applications
such as motor driving circuits.
Copyright © 2011–2012, Texas Instruments Incorporated
15
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
Power Supply
3.3 V
D+
D−
TPS2062
2
8
IN
V
BUS
7
10 µF
0.1 µF
Internal
OUT1
GND
Function
0.1 µF
10 µF
OC1
EN1
OC2
EN2
3
5
USB
Control
6
4
OUT2
GND
Internal
Function
0.1 µF
10 µF
1
Figure 26. High-Power Bus-Powered Function
USB POWER-DISTRIBUTION REQUIREMENTS
USB can be implemented in several ways, and, regardless of the type of USB device being developed, several
power-distribution features must be implemented.
•
•
Hosts/SPHs must:
–
–
Current-limit downstream ports
Report overcurrent conditions on USB VBUS
BPHs must:
–
–
–
Enable/disable power to downstream ports
Power up at <100 mA
Limit inrush current (<44 Ω and 10 μF)
•
Functions must:
–
–
Limit inrush currents
Power up at <100 mA
The feature set of the TPS2065-Q1 and TPS2062-Q1 allows them to meet each of these requirements. The
integrated current-limiting and overcurrent reporting is required by hosts and self-powered hubs. The logic-level
enable and controlled rise times meet the need of both input and output ports on bus-powered hubs, as well as
the input ports for bus-powered functions (see Figure 27).
16
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
TUSB2040
Hub Controller
SN75240
BUSPWR
Tie to TPS2041 EN Input
Downstream
Ports
Upstream
Port
A
B
C
D
GANGED
DP1
DM1
D +
D −
DP0
DM0
D +
D −
Ferrite Beads
A
B
C
D
GND
5 V
†
GND
SN75240
DP2
DM2
TPS2041B
OC EN
IN OUT
1 µF
33 µF
5-V Power
Supply
DP3
DM3
5 V
D +
D −
A
B
C
D
Ferrite Beads
TPS76333
IN
SN75240
GND
DP4
DM4
0.1 µF
4.7 µF
V
CC
3.3 V
GND
5 V
†
4.7 µF
TPS2062
PWRON1
GND
EN1
OC1
OUT1
OUT2
33 µF
OVRCUR1
PWRON2
OVRCUR2
48-MHz
Crystal
EN2
OC2
XTAL1
XTAL2
D +
D −
IN
0.1 µF
Ferrite Beads
Tuning
Circuit
GND
5 V
†
OCSOFF
GND
33 µF
D +
D −
Ferrite Beads
GND
5 V
†
33 µF
†
USB rev 1.1 requires 120 µF per hub.
Figure 27. Hybrid Self / Bus-Powered Hub Implementation
GENERIC HOT-PLUG APPLICATIONS
In many applications it may be necessary to remove modules or pc boards while the main unit is still operating.
These are considered hot-plug applications. Such implementations require the control of current surges seen by
the main power supply and the card being inserted. The most effective way to control these surges is to limit and
slowly ramp the current and voltage being applied to the card, similar to the way in which a power supply
normally turns on. Due to the controlled rise times and fall times of the TPS2065-Q1 and TPS2062-Q1, these
devices can be used to provide a softer start-up to devices being hot-plugged into a powered system. The UVLO
feature of the TPS2065-Q1 and TPS2062-Q1 ensures that the switch is off after the card has been removed, and
that the switch is off during the next insertion. The UVLO feature insures a soft start with a controlled rise time for
every insertion of the card or module.
Copyright © 2011–2012, Texas Instruments Incorporated
17
TPS2062-Q1, TPS2065-Q1
SLVSA01B –MAY 2011–REVISED APRIL 2012
www.ti.com
PC Board
TPS2062
Power
Supply
Block of
Circuitry
OC1
GND
2.7 V to 5.5 V
IN
OUT1
OUT2
0.1 µF
EN1
EN2
1000 µF
Optimum
OC2
Block of
Circuitry
Overcurrent Response
Figure 28. Typical Hot-Plug Implementation
By placing the TPS2065-Q1 and TPS2062-Q1 are between the VCC input and the rest of the circuitry, the input
power reaches these devices first after insertion. The typical rise time of the switch is approximately 1 ms,
providing a slow voltage ramp at the output of the device. This implementation controls system surge currents
and provides a hot-plugging mechanism for any device.
DETAILED DESCRIPTION
Power Switch
The power switch is an N-channel MOSFET with a low on-state resistance. Configured as a high-side switch, the
power switch prevents current flow from OUT to IN and IN to OUT when disabled. The power switch supplies a
minimum current of 1 A.
Charge Pump
An internal charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate
of the MOSFET above the source. The charge pump operates from input voltages as low as 2.7 V and requires
little supply current.
Driver
The driver controls the gate voltage of the power switch. To limit large current surges and reduce the associated
electromagnetic interference (EMI) produced, the driver incorporates circuitry that controls the rise times and fall
times of the output voltage.
Enable (ENx)
The logic enable disables the power switch and the bias for the charge pump, driver, and other circuitry to reduce
the supply current. The supply current is reduced to less than 1 μA when a logic high is present on ENx. A logic
zero input on ENx restores bias to the drive and control circuits and turns the switch on. The enable input is
compatible with both TTL and CMOS logic levels.
Overcurrent (OCx)
The OCx open-drain output is asserted (active low) when an overcurrent or overtemperature condition is
encountered. The output remains asserted until the overcurrent or overtemperature condition is removed. A 10-
ms deglitch circuit prevents the OCx signal from oscillation or false triggering. If an overtemperature shutdown
occurs, the OCx is asserted instantaneously.
18
Copyright © 2011–2012, Texas Instruments Incorporated
TPS2062-Q1, TPS2065-Q1
www.ti.com
SLVSA01B –MAY 2011–REVISED APRIL 2012
Current Sense
A sense FET monitors the current supplied to the load. The sense FET measures current more efficiently than
conventional resistance methods. When an overload or short circuit is encountered, the current-sense circuitry
sends a control signal to the driver. The driver in turn reduces the gate voltage and drives the power FET into its
saturation region, which switches the output into a constant-current mode and holds the current constant while
varying the voltage on the load.
Thermal Sense
The TPS2065-Q1 and TPS2062-Q1 implement a thermal sensing to monitor the operating temperature of the
power distribution switch. In an overcurrent or short-circuit condition the junction temperature rises. When the die
temperature rises to approximately 140°C due to overcurrent conditions, the internal thermal sense circuitry turns
off the switch, thus preventing the device from damage. Hysteresis is built into the thermal sense, and after the
device has cooled approximately 10 degrees, the switch turns back on. The switch continues to cycle off and on
until the fault is removed. The open-drain false reporting output (OCx) is asserted (active low) when an
overtemperature shutdown or overcurrent occurs.
Undervoltage Lockout
A voltage sense circuit monitors the input voltage. When the input voltage is below approximately 2 V, a control
signal turns off the power switch.
SPACER
REVISION HISTORY
Changes from Revision A (November 2011) to Revision B
Page
•
•
Changed Pin Out drawing to include EN. ............................................................................................................................. 1
Added or EN to Electrical Characteristics table. ................................................................................................................... 3
Copyright © 2011–2012, Texas Instruments Incorporated
19
PACKAGE OPTION ADDENDUM
www.ti.com
14-Jun-2012
PACKAGING INFORMATION
Status (1)
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
TPS2062QDGNRQ1
TPS2065QDGNRQ1
ACTIVE
ACTIVE
MSOP-
PowerPAD
DGN
DGN
8
8
2500
2500
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
MSOP-
PowerPAD
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
(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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TPS2062-Q1, TPS2065-Q1 :
Catalog: TPS2062, TPS2065
•
NOTE: Qualified Version Definitions:
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
14-Jun-2012
Catalog - TI's standard catalog product
•
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jun-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
2500
2500
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
TPS2062QDGNRQ1
TPS2065QDGNRQ1
MSOP-
Power
PAD
DGN
DGN
8
8
330.0
330.0
12.4
12.4
5.3
5.3
3.3
3.3
1.3
1.3
8.0
8.0
12.0
12.0
Q1
Q1
MSOP-
Power
PAD
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jun-2012
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
TPS2062QDGNRQ1
TPS2065QDGNRQ1
MSOP-PowerPAD
MSOP-PowerPAD
DGN
DGN
8
8
2500
2500
370.0
370.0
355.0
355.0
55.0
55.0
Pack Materials-Page 2
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