TI UCC27523

UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
Dual 5-A High-Speed Low-Side Gate Driver
Check for Samples: UCC27523, UCC27524, UCC27525, UCC27526
FEATURES
APPLICATIONS
•
•
•
•
•
•
•
•
•
1
Industry-Standard Pin Out
Two Independent Gate-Drive Channels
5-A Peak Source and Sink Drive Current
Independent Enable Function for Each Output
TTL and CMOS Compatible Logic Threshold
Independent of Supply Voltage
Hysteretic Logic Thresholds for High Noise
Immunity
Inputs and Enable Pin Voltage Levels Not
Restricted by VDD Pin Bias Supply Voltage
4.5-V to 18-V Single Supply Range
Outputs Held Low During VDD UVLO, (ensures
glitch-free operation at power-up and powerdown)
Fast Propagation Delays (13-ns typical)
Fast Rise and Fall Times (7-ns and 6-ns
typical)
1-ns Typical Delay Matching Between 2Channels
Two Outputs can be Paralleled for Higher
Drive Current
Outputs Held in LOW When Inputs Floating
PDIP-8, SOIC-8, MSOP-8 PowerPAD™ and 3mm x 3-mm WSON-8 Package Options
Operating Temperature Range of -40°C to
140°C
2
•
•
•
•
•
•
•
•
•
•
•
Switch-Mode Power Supplies
DC-to-DC Converters
Motor Control, Solar Power
Gate Drive for Emerging Wide Band Gap
Power Devices such as GaN
DESCRIPTION
The UCC2752x family of devices are dual-channel,
high-speed, low-side gate driver devices capable of
effectively driving MOSFET and IGBT power
switches. Using a design that inherently minimizes
shoot-through current, UCC2752x is capable of
delivering high-peak current pulses of up to 5-A
source and 5-A sink into capacitive loads along with
rail-to-rail drive capability and extremely small
propagation delay typically 13 ns. In addition, the
drivers feature matched internal propagation delays
between the two channels which are very well suited
for applications requiring dual-gate drives with critical
timing, such as synchronous rectifiers. This also
enables connecting two channels in parallel to
effectively increase current drive capability or driving
two switches in parallel with a single input signal. The
input pin thresholds are based on TTL and CMOS
compatible low-voltage logic, which is fixed and
independent of the VDD supply voltage. Wide
hysteresis between the high and low thresholds offers
excellent noise immunity.
Product Matrix
Dual Inverting Inputs
Dual Non-Inverting Inputs
One Inverting and One
Non-Inverting Input
UCC27523
UCC27524
UCC27525
Dual Input Configuration
UCC27526
8
ENB
INA
2
7
OUTA
GND
3
6
VDD
INB
4
5
OUTB
ENA
1
8
ENB
INA
2
7
OUTA
GND
3
6
VDD
INB
4
5
OUTB
INA-
1
OUTA
INB-
2
6
VDD
GND
5
OUTB
OUTB
ENA
1
8
ENB
INA
2
7
GND
3
INB
4
8
INA+
7
INB+
3
6
OUTA
4
5
VDD
+
1
+
ENA
1
2
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.
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
UCC27523, UCC27524, UCC27525, UCC27526
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
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.
DESCRIPTION (CONT.)
The UCC2752x family provide the combination of three standard logic options - dual-inverting, dual-non inverting,
one inverting and one non-inverting driver. UCC27526 features a dual input design which offers flexibility of both
inverting (IN- pin) and non-inverting (IN+ pin) configuration for each channel. Either IN+ or IN- pin can be used to
control the state of the driver output. The unused input pin can be used for enable and disable functions. For
safety purpose, internal pull-up and Pull-down resistors on the input pins of all the devices in UCC2752x family in
order to ensure that outputs are held LOW when input pins are in floating condition. UCC27323, UCC27324 and
UCC27325 feature an Enable pins (ENA and ENB) to have better control of the operation of the driver
applications. The pins are internally pulled up to VDD for active high logic and can be left open for standard
operation.
UCC2752x family of devices are available in SOIC-8 (D), MSOP-8 with exposed pad (DGN) and 3-mm x 3-mm
WSON-8 with exposed pad (DSD) packages. UCC27524 is also offered in PDIP-8 (P) package. UCC27526 is
only offered in 3-mm x 3-mm WSON (DSD) package.
ORDERING INFORMATION (1) (2)
(1)
(2)
PART NUMBER
PACKAGE
UCC27523
SOIC 8-Pin (D), MSOP 8-pin (DGN),
WSON 8-pin (DSD)
UCC27524
SOIC 8-Pin (D), MSOP 8-pin (DGN),
WSON 8-pin (DSD), PDIP 8-pin (P)
UCC27525
SOIC 8-Pin (D), MSOP 8-pin (DGN),
WSON 8-pin (DSD)
UCC27526
WSON 8-pin (DSD)
OPERATING TEMPERATURE RANGE, TA
-40°C to 140°C
For the most current package and ordering information, see Package Option Addendum at the end of this document.
All packages use Pb-Free lead finish of Pd-Ni-Au which is compatible with MSL level 1 at 255°C to 260°C peak reflow temperature to be
compatible with either lead free or Sn/Pb soldering operations. DSD package is rated MSL level 2.
TOPSIDE MARKING INFORMATION
2
PART NUMBER WITH PACKAGE DESIGNATOR
TOP MARKINGS
UCC27524D
27524
UCC27524DGN
27524
UCC27524DSD
SBA
UCC27524P
27524
UCC27523D
27523
UCC27523DGN
27523
UCC27523DSD
27523
UCC27525D
27525
UCC27525DGN
27525
UCC27525DSD
27525
UCC27526DSD
SCB
Copyright © 2011–2012, Texas Instruments Incorporated
UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
ABSOLUTE MAXIMUM RATINGS (1) (2)
over operating free-air temperature range (unless otherwise noted)
MIN
Supply voltage range
OUTA, OUTB voltage
UNIT
VDD
-0.3 to
20.0
DC
-0.3 to
VDD + 0.3
Repetitive pulse < 200 ns (3)
-2.0 to
VDD + 0.3
Output continuous source/sink
current
IOUT_DC
Output pulsed source/sink current
(0.5 µs)
IOUT_pulsed
A
5
-0.3
20
Human body model, HBM
4000
Charge device model, CDM
1000
Operating virtual junction temperature, TJ range
-40
150
Storage temperature range, Tstg
-65
150
Lead temperature
(1)
(2)
(3)
(4)
(5)
V
0.3
INA, INB, INA+, INA-, INB+, INB-, ENA, ENB voltage (4)
ESD (5)
MAX
Soldering, 10 sec.
300
Reflow
260
V
°C
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.
All voltages are with respect to GND unless otherwise noted. Currents are positive into, negative out of the specified terminal. See
Packaging Section of the datasheet for thermal limitations and considerations of packages.
Values are verified by characterization on bench.
The maximum voltage on the Input and Enable pins is not restricted by the voltage on the VDD pin.
These devices are sensitive to electrostatic discharge; follow proper device handling procedures.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
TYP
MAX
Supply voltage range, VDD
4.5
12
18
UNIT
V
Operating junction temperature range
-40
140
°C
Input voltage, INA, INB, INA+, INA-, INB+, INB-
0
18
V
Enable voltage, ENA and ENB
0
18
Copyright © 2011–2012, Texas Instruments Incorporated
3
UCC27523, UCC27524, UCC27525, UCC27526
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
www.ti.com
THERMAL INFORMATION
THERMAL METRIC
UCC27523,
UCC27524,
UCC27525
UCC27523,
UCC27524,
UCC27525
SOIC (D)
MSOP (DGN) (1)
8 PINS
8 PINS
θJA
Junction-to-ambient thermal resistance (2)
130.9
71.8
θJCtop
Junction-to-case (top) thermal resistance (3)
80.0
65.6
(4)
θJB
Junction-to-board thermal resistance
71.4
7.4
ψJT
Junction-to-top characterization parameter (5)
21.9
7.4
ψJB
Junction-to-board characterization parameter (6)
70.9
31.5
θJCbot
Junction-to-case (bottom) thermal resistance (7)
n/a
19.6
(1)
(2)
(3)
(4)
(5)
(6)
(7)
UNITS
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as
specified in JESD51-7, in an environment described in JESD51-2a.
The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB
temperature, as described in JESD51-8.
The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θJA, using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θJA , using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific
JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
THERMAL INFORMATION
UCC27524
THERMAL METRIC
PDIP (P)
Junction-to-ambient thermal resistance (2)
θJA
(3)
UCC27523,
UCC27524,
UCC27525,
UCC27526
WSON (DSD)
8 PINS
8 PINS
62.1
46.7
θJCtop
Junction-to-case (top) thermal resistance
52.7
46.7
θJB
Junction-to-board thermal resistance (4)
39.1
22.4
ψJT
Junction-to-top characterization parameter (5)
31.0
0.7
ψJB
Junction-to-board characterization parameter (6)
39.1
22.6
θJCbot
Junction-to-case (bottom) thermal resistance (7)
n/a
9.5
(1)
(2)
(3)
(4)
(5)
(6)
(7)
4
UNITS
(1)
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as
specified in JESD51-7, in an environment described in JESD51-2a.
The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB
temperature, as described in JESD51-8.
The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θJA, using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining θJA , using a procedure described in JESD51-2a (sections 6 and 7).
The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific
JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
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Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): UCC27523, UCC27524, UCC27525, UCC27526
UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
ELECTRICAL CHARACTERISTICS
VDD = 12 V, TA = TJ = -40°C to 140°C, 1-µF capacitor from VDD to GND. Currents are positive into, negative out of the
specified terminal (unless otherwise noted,)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNITS
Bias Currents
IDD(off)
Startup current,
(based on UCC27524 Input
configuration)
VDD = 3.4 V,
INA=VDD,
INB=VDD
55
VDD = 3.4 V,
INA=GND,
INB=GND
25
75
145
TJ = 25°C
3.91
4.20
4.50
TJ = -40°C to 140°C
110
175
μA
Under Voltage LockOut (UVLO)
VON
Supply start threshold
3.70
4.20
4.65
VOFF
Minimum operating voltage
after supply start
3.40
3.90
4.40
VDD_H
Supply voltage hysteresis
0.20
0.30
0.50
V
Inputs (INA, INB, INA+, INA-, INB+, INB-), UCC2752X (D, DGN, DSD)
VIN_H
Input signal high threshold
Output high for non-inverting input pins
Output low for inverting input pins
1.9
2.1
2.3
VIN_L
Input signal low threshold
Output low for non-inverting input pins
Output high for inverting input pins
1.0
1.2
1.4
VIN_HYS
Input hysteresis
0.70
0.90
1.10
V
INPUTS (INA, INB, INA+, INA-, INB+, INB-) UCC27524P ONLY
VIN_H
Input signal high threshold
Output high for non-inverting input pins
Output low for inverting input pins
VIN_L
Input signal low threshold
Output low for non-inverting input pins
Output high for inverting input pins
VIN_HYS
Input hysteresis
2.3
V
1.0
0.9
Enable (ENA, ENB) UCC2752X (D, DGN, DSD)
VEN_H
Enable signal high threshold
Output enabled
1.9
2.1
2.3
VEN_L
Enable signal low threshold
Output disabled
0.95
1.15
1.35
VEN_HYS
Enable hysteresis
0.70
0.95
1.10
V
ENABLE (ENA, ENB) UCC27524P ONLY
VEN_H
Enable signal high threshold
Output enabled
VEN_L
Enable signal low threshold
Output disabled
VEN_HYS
Enable hysteresis
2.3
0.95
V
0.95
Outputs (OUTA, OUTB)
ISNK/SRC
Sink/source peak current (1)
CLOAD = 0.22 µF, FSW = 1 kHz
VDD-VOH
High output voltage
IOUT = -10 mA
0.075
VOL
Low output voltage
IOUT = 10 mA
0.01
ROH
Output pull-up resistance (2)
IOUT = -10 mA
2.5
5
7.5
Ω
ROL
Output pull-down resistance
IOUT = 10 mA
0.15
0.5
1
Ω
±5
A
V
Switching Time
(1)
(2)
Ensured by design.
ROH represents on-resistance of only the P-Channel MOSFET device in pull-up structure of UCC2752X output stage.
Copyright © 2011–2012, Texas Instruments Incorporated
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SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
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ELECTRICAL CHARACTERISTICS (continued)
VDD = 12 V, TA = TJ = -40°C to 140°C, 1-µF capacitor from VDD to GND. Currents are positive into, negative out of the
specified terminal (unless otherwise noted,)
PARAMETER
tR
Rise time
tF
TEST CONDITION
(3)
MIN
TYP
MAX
UNITS
CLOAD = 1.8 nF
7
18
Fall time (3)
CLOAD = 1.8 nF
6
10
tM
Delay matching between 2
channels
INA = INB, OUTA and OUTB at 50% transition
point
1
4
tPW
Minimum input pulse width
that changes the output state
15
25
tD1, tD2
Input to output propagation
delay (3)
CLOAD = 1.8 nF, 5-V input pulse
6
13
23
tD3, tD4
EN to output propagation
delay (3)
CLOAD = 1.8 nF, 5-V enable pulse
6
13
23
(3)
ns
See timing diagrams in Figure 1, Figure 2, Figure 3 and Figure 4
Timing Diagrams
High
High
Input
Input
Low
Low
High
High
Enable
Enable
Low
Low
90%
90%
Output
Output
10%
10%
tD3
tD4
Figure 1. Enable Function
(for non-inverting input driver operation)
tD4
UDG-11218
Figure 2. Enable Function
(for inverting input driver operation)
High
High
Input
Input
Low
Low
High
High
Enable
Enable
Low
Low
90%
90%
Output
Output
10%
10%
tD1
tD2
UDG-11219
Figure 3. Non-Inverting Input Driver Operation
6
tD3
UDG-11217
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tD1
tD2
UDG-11220
Figure 4. Inverting Input Driver Operation
Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): UCC27523, UCC27524, UCC27525, UCC27526
UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
DEVICE INFORMATION
UCC27523,4,5(D,DGN) &
UCC27524P
(TOP VIEW)
UCC2752(3,4,5)DSD
(TOP VIEW)
ENA 1
8
ENB
INA 2
7
OUTA
GND 3
6
VDD
INB 4
5
OUTB
UCC27526 DSD
(TOP VIEW)
ENA
1
8
ENB
INA-
1
8
INA+
INA
2
7
OUTA
INB-
2
7
INB+
GND
3
6
VDD
GND
3
6
OUTA
INB
4
5
OUTB
OUTB
4
5
VDD
Figure 5.
TERMINAL FUNCTIONS (UCC27523/UCC27524/UCC27525)
TERMINAL
I/O
FUNCTION
NUMBER
NAME
1
ENA
I
Enable input for Channel A: ENA biased LOW Disables Channel A output
regardless of INA state, ENA biased HIGH or floating Enables Channel A output,
ENA allowed to float hence it is pin-to-pin compatible with UCC2732X N/C pin.
2
INA
I
Input to Channel A: Inverting Input in UCC27523, Non-Inverting Input in UCC27524,
Inverting Input in UCC27525, OUTA held LOW if INA is unbiased or floating.
3
GND
-
Ground: All signals referenced to this pin.
4
INB
I
Input to Channel B: Inverting Input in UCC27523, Non-Inverting Input in UCC27524,
Non-Inverting Input in UCC27525, OUTB held LOW if INB is unbiased or floating.
5
OUTB
O
Output of Channel B
6
VDD
I
Bias supply input
7
OUTA
O
Output of Channel A
8
ENB
I
Enable input for Channel B: ENB biased LOW Disables Channel B output
regardless of INB state, ENB biased HIGH or floating Enables Channel B output,
ENB allowed to float hence it is pin-to-pin compatible with UCC2732X N/C pin.
TERMINAL FUNCTIONS (UCC27526)
TERMINAL
I/O
FUNCTION
NUMBER
NAME
1
INA-
I
Inverting Input to Channel A: when Channel A is used in Non-Inverting
configuration connect INA- to GND in order to Enable Channel A output, OUTA held
LOW if INA- is unbiased or floating.
2
INB-
I
Inverting Input to Channel B: when Channel B is used in Non-Inverting
configuration connect INB- to GND in order to Enable Channel B output, OUTB held
LOW if INB- is unbiased or floating.
3
GND
-
Ground: All signals referenced to this pin.
4
OUTB
I
Output of Channel B
5
VDD
O
Bias Supply Input
6
OUTA
I
Output of Channel A
7
INB+
O
Non-Inverting Input to Channel B: When Channel B is used in Inverting
configuration connect INB+ to VDD in order to Enable Channel B output, OUTB held
LOW if INB+ is unbiased or floating.
8
INA+
I
Non-Inverting Input to Channel A: When Channel A is used in Inverting
configuration connect INA+ to VDD in order to Enable Channel A output, OUTA held
LOW if INA+ is unbiased or floating.
Copyright © 2011–2012, Texas Instruments Incorporated
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Table 1. Device Logic Table (UCC27523/UCC27524/UCC27525)
UCC27523
ENA
ENB
INA
H
H
H
H
H
H
H
H
OUTA
OUTB
OUTA
L
L
H
H
L
H
H
L
H
L
L
H
H
H
L
L
UCC27525
OUTB
OUTA
OUTB
L
L
H
L
L
H
H
H
H
L
L
L
H
H
L
H
L
L
Any
Any
L
L
L
L
L
L
Any
Any
x (1)
x (1)
L
L
L
L
L
L
x (1)
x (1)
L
L
H
H
L
L
H
L
(1)
(1)
L
H
H
L
L
H
H
H
x (1)
x (1)
H
L
L
H
H
L
L
L
x (1)
x (1)
H
H
L
L
H
H
L
H
x
(1)
UCC27524
INB
x
Floating condition.
Table 2. Device Logic Table (UCC27526)
(1)
8
INx+ (x = A or B)
INx- (x = A or B)
OUTx (x = A or B)
L
L
L
L
H
L
H
L
H
H
H
L
x (1)
Any
L
Any
(1)
L
x
x = Floating condition.
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Product Folder Link(s): UCC27523, UCC27524, UCC27525, UCC27526
UCC27523, UCC27524, UCC27525, UCC27526
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SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
Functional Block Diagrams
VDD
VDD
200 kW
ENA
200 kW
1
8
ENB
7
OUTA
6
VDD
5
OUTB
VDD
VDD
200 kW
INA
2
VDD
GND
3
VDD
VDD
UVLO
VDD
200 kW
INB
4
UDG-11221
Figure 6. UCC27523 Block Diagram
VDD
VDD
200 kW
ENA
200 kW
1
8
ENB
VDD
INA
OUTA
2
7
400 kW
VDD
VDD
VDD
UVLO
GND
6
3
VDD
INB
OUTB
4
5
400 kW
Figure 7. UCC27524 Block Diagram
Copyright © 2011–2012, Texas Instruments Incorporated
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VDD
VDD
200 kW
ENA
200 kW
1
8
ENB
7
OUTA
6
VDD
5
OUTB
VDD
VDD
200 kW
INA
2
VDD
VDD
GND
UVLO
3
VDD
INB
4
400 kW
UDG-11223
Figure 8. UCC27525 Block Diagram
INA+
8
VDD
400 kW
5
VDD
6
OUTA
4
OUTB
VDD
VDD
200 kW
INA-
1
VDD
GND
3
UVLO
INB+
7
VDD
VDD
400 kW
200 kW
INB-
2
UDG-11222
Figure 9. UCC27526 Block Diagram
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TYPICAL CHARACTERISTICS
START-UP CURRENT
vs
TEMPERATURE
OPERATING SUPPLY CURRENT
vs
TEMPERATURE (Outputs switching)
4
Input=VDD
Input=GND
Operating Supply Current (mA)
Startup Current (mA)
0.14
0.12
0.1
0.08
3.5
3
VDD = 12 V
fSW = 500 kHz
CL = 500 pF
VDD=3.4V
0.06
−50
0
50
Temperature (°C)
100
2.5
−50
150
Figure 11.
SUPPLY CURRENT
vs
TEMPERATURE (Outputs in DC on/off condition)
UVLO THRESHOLD
vs
TEMPERATURE
UVLO Threshold (V)
0.4
0.3
G002
Enable=12 V
VDD = 12 V
0
50
Temperature (°C)
100
4.5
4
3.5
3
−50
150
0
G012
50
Temperature (°C)
Figure 12.
Figure 13.
INPUT THRESHOLD
vs
TEMPERATURE
ENABLE THRESHOLD
vs
TEMPERATURE
2.5
2
2
Enable Threshold (V)
2.5
VDD = 12 V
1.5
1
0
50
Temperature (°C)
Figure 14.
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100
100
150
G003
VDD = 12 V
1.5
1
Input High Threshold
Input Low Threshold
0.5
−50
150
UVLO Rising
UVLO Falling
0.5
0.2
−50
100
5
Input=GND
Input=VDD
Supply Current (mA)
50
Temperature (°C)
Figure 10.
0.6
Input Threshold (V)
0
G001
Enable High Threshold
Enable Low Threshold
150
G004
0.5
−50
0
50
Temperature (°C)
100
150
G005
Figure 15.
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TYPICAL CHARACTERISTICS (continued)
OUTPUT PULL-UP RESISTANCE
vs
TEMPERATURE
OUTPUT PULL-DOWN RESISTANCE
vs
TEMPERATURE
1
VDD = 12 V
IOUT = −10 mA
Output Pull−down Resistance (Ω)
Output Pull−up Resistance (Ω)
7
6
5
4
3
−50
0
50
Temperature (°C)
100
VDD = 12 V
IOUT = 10 mA
0.8
0.6
0.4
0.2
−50
150
Figure 17.
RISE TIME
vs
TEMPERATURE
FALL TIME
vs
TEMPERATURE
150
G007
VDD = 12 V
CLOAD = 1.8 nF
9
8
Fall Time (ns)
Rise Time (ns)
100
9
VDD = 12 V
CLOAD = 1.8 nF
8
7
7
6
6
5
−50
0
50
Temperature (°C)
100
5
−50
150
0
G008
50
Temperature (°C)
100
Figure 19.
INPUT TO OUTPUT PROPAGATION DELAY
vs
TEMPERATURE
EN TO OUTPUT PROPAGATION DELAY
vs
TEMPERATURE
18
18
Turn−on
Turn−off
16
14
12
10
VDD = 12 V
CLOAD = 1.8 nF
8
−50
150
G009
Figure 18.
EN to Output Propagation Delay (ns)
Input to Output Propagation Delay (ns)
50
Temperature (°C)
Figure 16.
10
0
50
Temperature (°C)
Figure 20.
12
0
G006
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100
150
G010
EN to Output High
EN to Output Low
16
14
12
10
VDD = 12 V
CLOAD = 1.8 nF
8
−50
0
50
Temperature (°C)
100
150
G011
Figure 21.
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TYPICAL CHARACTERISTICS (continued)
OPERATING SUPPLY CURRENT
vs
FREQUENCY
PROPAGATION DELAYS
vs
SUPPLY VOLTAGE
22
VDD = 4.5 V
VDD = 12 V
VDD = 15 V
50
Propagation Delays (ns)
Operating Supply Current (mA)
60
40
CLOAD = 1.8 nF
Both channels switching
30
20
Input to Output On delay
Input to Ouptut Off Delay
EN to Output On Delay
EN to Output Off Delay
18
14
10
10
0
CLOAD = 1.8 nF
0
6
100 200 300 400 500 600 700 800 900 1000
Frequency (kHz)
G013
4
8
12
Supply Voltage (V)
Figure 22.
Figure 23.
RISE TIME
vs
SUPPLY VOLTAGE
FALL TIME
vs
SUPPLY VOLTAGE
18
G014
CLOAD = 1.8 nF
14
Fall Time (ns)
Rise Time (ns)
20
10
CLOAD = 1.8 nF
10
6
16
4
8
12
Supply Voltage (V)
16
8
6
4
20
4
8
12
Supply Voltage (V)
G015
Figure 24.
16
20
G016
Figure 25.
ENABLE THRESHOLD
vs
TEMPERATURE
2.5
VDD = 4.5 V
Enable Threshold (V)
Enable High Threshold
Enable Low Threshold
2
1.5
1
0.5
−50
0
50
Temperature (°C)
100
150
G017
Figure 26.
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APPLICATION INFORMATION
High-current gate-driver devices are required in switching power applications for a variety of reasons. In order to
effect fast switching of power devices and reduce associated switching power losses, a powerful gate driver
device can be employed between the PWM output of control devices and the gates of the power semiconductor
devices. Further, gate driver devices are indispensable when sometimes it is just not feasible to have the PWM
controller device directly drive the gates of the switching devices. With advent of digital power, this situation will
be often encountered since the PWM signal from the digital controller is often a 3.3-V logic signal which is not
capable of effectively turning on a power switch. A level shifting circuitry is needed to boost the 3.3-V signal to
the gate-drive voltage (such as 12 V) in order to fully turn on the power device and minimize conduction losses.
Traditional buffer drive circuits based on NPN/PNP bipolar transistors in totem-pole arrangement, being emitter
follower configurations, prove inadequate with digital power since they lack level-shifting capability. Gate driver
devices effectively combine both the level-shifting and buffer drive functions. Gate driver devices also find other
needs such as minimizing the effect of high-frequency switching noise by locating the high-current driver
physically close to the power switch, driving gate drive transformers and controlling floating power device gates,
reducing power dissipation and thermal stress in controller devices by moving gate charge power losses into
itself etc. Finally, emerging wide band-gap power device technologies such as GaN based switches, which are
capable of supporting very high switching frequency operation, are driving special requirements in terms of gate
drive capability. These requirements include operation at low VDD voltages (5 V or lower), low propagation
delays, tight delay matching and availability in compact, low-inductance packages with good thermal capability. In
summary Gate-driver devices are an extremely important component in switching power combining benefits of
high performance, low cost, component count, board-space reduction and simplified system design.
ENB
UCC2752x
ENA
1
ENA
INA
2
INA
3
GND
4
INB
ENB
8
OUTA
7
VDD
6
OUTB
5
V+
GND
INB
GND
GND
UDG-11225
Figure 27. UCC2752x Typical Application Diagram (x = 3, 4 or 5)
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UCC27526
INA-
1
INA-
INA+
8
2
INB-
INB+
7
3
GND
OUTA
6
INB+
V+
GND
GND
4
OUTB
VDD
5
GND
UDG-11226
Figure 28. UCC27526 Channel A in Inverting and Channel B in Non-Inverting Configuration,
(enable function not used)
OUTA is
ENABLED when
ENA is HIGH
UCC27526
INA-
1
INA-
INA+
8
ENA
ENB
2
INB-
INB+
7
INB+
3
GND
OUTA
6
OUTB is
ENABLED when
ENB is LOW
V+
GND
GND
4
OUTB
VDD
5
GND
UDG-11227
Figure 29. UCC27526 Channel A in Inverting and Channel B in Non-Inverting Configuration,
(enable function implemented)
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Introduction
The UCC2752x family of products represent Texas Instruments’ latest generation of dual-channel, low-side highspeed gate driver devices featuring 5-A source/sink current capability, industry best-in-class switching
characteristics and a host of other features listed in table below all of which combine to guarantee efficient,
robust and reliable operation in high-frequency switching power circuits.
Table 3. UCC2752x Family of Features and Benefits
FEATURE
BENEFIT
Best-in-class 13-ns (typ) propagation delay
Extremely low pulse transmission distortion
1-ns (typ) delay matching between channels
Ease of paralleling outputs for higher (2x) current capability, ease of
driving parallel power switches
Expanded VDD Operating range of 4.5 V to 18 V
Flexibility in system design
Expanded operating temperature range of -40°C to 140°C
(See ELECTRICAL CHARACTERISTICS table)
VDD UVLO Protection
Outputs are held Low in UVLO condition, which ensures predictable,
glitch-free operation at power-up and power-down
Outputs held Low when input pins (INx) in floating condition
Safety feature, especially useful in passing abnormal condition tests
during safety certification
Outputs enabled when enable pins (ENx) in floating condition
Pin-to-pin compatibility with UCC2732X family of products from TI, in
designs where pin #1, 8 are in floating condition
CMOS/TTL compatible input and enable threshold with wide
hysteresis
Enhanced noise immunity, while retaining compatibility with
microcontroller logic level input signals (3.3V, 5V) optimized for
digital power
Ability of input and enable pins to handle voltage levels not restricted System simplification, especially related to auxiliary bias supply
by VDD pin bias voltage
architecture
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VDD and Under Voltage Lockout
The UCC2752x devices have internal under voltage lockout (UVLO) protection feature on the VDD pin supply
circuit blocks. When VDD is rising and the level is still below UVLO threshold, this circuit holds the output LOW,
regardless of the status of the inputs. The UVLO is typically 4.25 V with 350-mV typical hysteresis. This
hysteresis helps prevent chatter when low VDD supply voltages have noise from the power supply and also
when there are droops in the VDD bias voltage when the system commences switching and there is a sudden
increase in IDD. The capability to operate at low voltage levels such as below 5 V, along with best in class
switching characteristics, is especially suited for driving emerging GaN power semiconductor devices.
For example, at power-up, the UCC2752x driver-device output remains LOW until the VDD voltage reaches the
UVLO threshold if Enable pin is active or floating. The magnitude of the OUT signal rises with VDD until steadystate VDD is reached. The non-inverting operation in Figure 30 shows that the output remains LOW until the
UVLO threshold is reached, and then the output is in-phase with the input. The inverting operation in Figure 31
shows that the output remains LOW until the UVLO threshold is reached, and then the output is out-phase with
the input. With UCC27526 the output turns to high state only if INX+ is high and INX- is low after the UVLO
threshold is reached.
Since the device draws current from the VDD pin to bias all internal circuits, for the best high-speed circuit
performance, two VDD bypass capacitors are recommended to prevent noise problems. The use of surface
mount components is highly recommended. A 0.1-μF ceramic capacitor should be located as close as possible to
the VDD to GND pins of the gate-driver device. In addition, a larger capacitor (such as 1-μF) with relatively low
ESR should be connected in parallel and close proximity, in order to help deliver the high-current peaks required
by the load. The parallel combination of capacitors should present a low impedance characteristic for the
expected current levels and switching frequencies in the application.
VDD Threshold
VDD Threshold
VDD
VDD
EN
EN
IN
IN
OUT
OUT
UDG-11229
UDG-11228
Figure 30. Power-Up Non-Inverting Driver
Figure 31. Power-Up Inverting Driver
Operating Supply Current
The UCC2752x products feature very low quiescent IDD currents. The typical operating supply current in Under
Voltage Lock-Out (UVLO) state and fully-on state (under static and switching conditions) are summarized in
Figure 10, Figure 11 and Figure 12. The IDD current when the device is fully on and outputs are in a static state
(DC high or DC low, refer Figure 11) represents lowest quiescent IDD current when all the internal logic circuits of
the device are fully operational. The total supply current is the sum of the quiescent IDD current, the average IOUT
current due to switching and finally any current related to pull-up resistors on the enable pins and inverting input
pins. For example when the inverting Input pins are pulled low additional current is drawn from VDD supply
through the pull-up resistors (refer to Figure 6 though Figure 9). Knowing the operating frequency (fSW) and the
MOSFET gate (QG) charge at the drive voltage being used, the average IOUT current can be calculated as
product of QG and fSW.
A complete characterization of the IDD current as a function of switching frequency at different VDD bias voltages
under 1.8-nF switching load in both channels is provided in Figure 22. The strikingly linear variation and close
correlation with theoretical value of average IOUT indicates negligible shoot-through inside the gate-driver device
attesting to its high-speed characteristics.
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Input Stage
The input pins of UCC2752x gate-driver devices are based on a TTL/CMOS compatible input threshold logic that
is independent of the VDD supply voltage. With typically high threshold = 2.1 V and typically low threshold = 1.2
V, the logic level thresholds can be conveniently driven with PWM control signals derived from 3.3-V and 5-V
digital power controller devices. Wider hysteresis (typ 0.9 V) offers enhanced noise immunity compared to
traditional TTL logic implementations, where the hysteresis is typically less than 0.5 V. UCC2752x devices also
feature tight control of the input pin threshold voltage levels which eases system design considerations and
ensures stable operation across temperature (refer to Figure 14). The very low input capacitance on these pins
reduces loading and increases switching speed.
The UCC2752x devices feature an important safety feature wherein, whenever any of the input pins is in a
floating condition, the output of the respective channel is held in the low state. This is achieved using VDD pull-up
resistors on all the Inverting inputs (INA, INB in UCC27523, INA in UCC27525 and INA-, INB- in UCC27526) or
GND pull-down resistors on all the non-inverting input pins (INA, INB in UCC27524, INB in UCC27525 and INA+,
INB+ in UCC27526), as shown in the device block diagrams.
While UCC27523/4/5 devices feature one input pin per channel, the UCC27526 features a dual input
configuration with two input pins available to control the output state of each channel. With the UCC27526 device
the user has the flexibility to drive each channel using either a non-inverting input pin (INx+) or an inverting input
pin (INx-). The state of the output pin is dependent on the bias on both the INx+ and INx- pins (where x = A, B).
Once an Input pin has been chosen to drive a channel, the other input pin of that channel (the unused input pin)
must be properly biased in order to enable the output of the channel. The unused input pin cannot remain in a
floating condition because, as mentioned earlier, whenever any input pin is left in a floating condition, the output
of that channel is disabled using the internal pull-up/down resistors for safety purposes. Alternatively, the unused
input pin can effectively be used to implement an enable/disable function, as explained below.
• In order to drive the channel x (x = A or B) in a non-inverting configuration, apply the PWM control input
signal to INx+ pin. In this case, the unused input pin, INx-, must be biased low (eg. tied to GND) in order to
enable the output of this channel.
– Alternately, the INx- pin can be used to implement the enable/disable function using an external logic
signal. OUTx is disabled when INx- is biased High and OUTx is enabled when INX- is biased low.
• In order to drive the channel x (x = A or B) in an Inverting configuration, apply the PWM control input signal to
INX- pin. In this case, the unused input pin, INX+, must be biased high (eg. tied to VDD) in order to enable
the output of the channel.
– Alternately, the INX+ pin can be used to implement the enable/disable function using an external logic
signal. OUTX is disabled when INX+ is biased low and OUTX is enabled when INX+ is biased high.
• Finally, it is worth noting that the UCC27526 output pin can be driven into high state only when INx+ pin is
biased high and INx- input is biased low.
Refer to the input/output logic truth table and typical application diagram, (Figure 28 and Figure 29), for additional
clarification.
The input stage of each driver should be driven by a signal with a short rise or fall time. This condition is satisfied
in typical power supply applications, where the input signals are provided by a PWM controller or logic gates with
fast transition times (<200 ns) with a slow changing input voltage, the output of the driver may switch repeatedly
at a high frequency. While the wide hysteresis offered in UCC2752x definitely alleviates this concern over most
other TTL input threshold devices, extra care is necessary in these implementations. If limiting the rise or fall
times to the power device is the primary goal, then an external resistance is highly recommended between the
output of the driver and the power device. This external resistor has the additional benefit of reducing part of the
gate charge related power dissipation in the gate driver device package and transferring it into the external
resistor itself.
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Enable Function
The enable function is an extremely beneficial feature in gate driver devices especially for certain applications
such as synchronous rectification where the driver outputs can be disabled in light-load conditions to prevent
negative current circulation and to improve light-load efficiency.
UCC27523/4/5 devices are provided with independent enable pins ENx for exclusive control of each driver
channel operation. The enable pins are based on a non-inverting configuration (active high operation). Thus
when ENx pins are driven high the drivers are enabled and when ENx pins are driven low the drivers are
disabled. Like the input pins, the enable pins are also based on a TTL/CMOS compatible input threshold logic
that is independent of the supply voltage and can be effectively controlled using logic signals from 3.3-V and 5-V
microcontrollers. The UCC2752X devices also feature tight control of the Enable function threshold voltage levels
which eases system design considerations and ensures stable operation across temperature (refer to Figure 15).
The ENx pins are internally pulled up to VDD using pull-up resistors as a result of which the outputs of the device
are enabled in the default state. Hence the ENx pins can be left floating or Not Connected (N/C) for standard
operation, where the enable feature is not needed. Essentially, this allows the UCC27523/4/5 devices to be pinto-pin compatible with TI’s previous generation drivers UCC27323/4/5 respectively, where pins #1, 8 are N/C
pins. If the channel A and Channel B inputs and outputs are connected in parallel to increase the driver current
capacity, ENA and ENB should be connected and driven together.
The UCC27526 device does not feature dedicated enable pins. However, as mentioned earlier, an
enable/disable function can be easily implemented in UCC27526 using the unused input pin. When INx+ is
pulled-down to GND or INx- is pulled-down to VDD, the output is disabled. Thus INx+ pin can be used like an
enable pin that is based on active high logic, while INx- can be used like an enable pin that is based on active
low logic. It is important to note that while the ENA, ENB pins in UCC27523/4/5 are allowed to be in floating
condition during standard operation and the outputs will be enabled, the INx+, INx- pins in UCC27526 are not
allowed to be floating since this will disable the outputs.
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Output Stage
The UCC2752x device output stage features a unique architecture on the pull-up structure which delivers the
highest peak Source current when it is most needed during the Miller plateau region of the power switch turn-on
transition (when the power switch drain/collector voltage experiences dV/dt). The output stage pull-up structure
features a P-Channel MOSFET and an additional N-Channel MOSFET in parallel. The function of the N-Channel
MOSFET is to provide a brief boost in the peak sourcing current enabling fast turn-on. This is accomplished by
briefly turning-on on the N-Channel MOSFET during a narrow instant when the output is changing state from Low
to High.
VCC
ROH
RNMOS, Pull Up
Input Signal Anti ShootThrough
Circuitry
Gate
Voltage
Boost
OUT
Narrow Pulse at
each Turn On
ROL
Figure 32. UCC2752X Gate Driver Output Structure
The ROH parameter (see ELECTRICAL CHARACTERISTICS) is a DC measurement and it is representative of
the on-resistance of the P-Channel device only. This is because the N-Channel device is held in the off state in
DC condition and is turned-on only for a narrow instant when output changes state from low to high. Thus it
should be noted that effective resistance of UCC2752x pull-up stage during turn-on instant is much lower than
what is represented by ROH parameter.
The pull-down structure in UCC2752x is simply composed of a N-Channel MOSFET. The ROL parameter (see
ELECTRICAL CHARACTERISTICS), which is also a DC measurement, is representative of the impedance of the
pull-down stage in the device. In UCC2752x, the effective resistance of the hybrid pull-up structure during turn-on
is estimated to be approximately 1.5 x ROL, estimated based on design considerations.
Each output stage in UCC2752x is capable of supplying 5-A peak source and 5-A peak sink current pulses. The
output voltage swings between VDD and GND providing rail-to-rail operation, thanks to the MOS output stage
which delivers very low drop-out. The presence of the MOSFET body diodes also offers low impedance to
switching overshoots and undershoots. This means that in many cases, external Schottky diode clamps may be
eliminated. The outputs of these drivers are designed to withstand 500-mA reverse current without either
damage to the device or logic malfunction.
The UCC2752x devices are particularly suited for dual-polarity, symmetrical drive gate transformer applications
where the primary winding of transformer driven by OUTA and OUTB, with inputs INA and INB being driven
complementary to each other. This is due to the extremely low drop-out offered by the MOS output stage of
these devices, both during high (VOH) and low (VOL) states along with the low impedance of the driver output
stage, all of which allow alleviate concerns regarding transformer demagnetization and flux imbalance. The low
propagation delays also ensure accurate reset for high-frequency applications.
For applications that have zero voltage switching during power MOSFET turn-on or turn-off interval, the driver
supplies high-peak current for fast switching even though the miller plateau is not present. This situation often
occurs in synchronous rectifier applications because the body diode is generally conducting before power
MOSFET is switched on.
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Low Propagation Delays and Tightly Matched Outputs
The UCC2752x driver devices feature a best in class, 13-ns (typical) propagation delay between input and output
which goes to offer the lowest level of pulse transmission distortion available in the industry for high frequency
switching applications. For example in synchronous rectifier applications, the SR MOSFETs can be driven with
very low distortion when a single driver device is used to drive both the SR MOSFETs. Further, the driver
devices also feature an extremely accurate, 1-ns (typ) matched internal propagation delays between the two
channels which is beneficial for applications requiring dual gate drives with critical timing. For example in a PFC
application, a pair of paralleled MOSFETs may be driven independently using each output channel, which the
inputs of both channels are driven by a common control signal from the PFC controller device. In this case the
1ns delay matching ensures that the paralleled MOSFETs are driven in a simultaneous fashion with the minimum
of turn-on delay difference. Yet another benefit of the tight matching between the two channels is that the two
channels can be connected together to effectively increase current drive capability i.e. A and B channels may be
combined into a single driver by connecting the INA and INB inputs together and the OUTA and OUTB outputs
together. Then, a single signal can control the paralleled combination.
Caution must be exercised when directly connecting OUTA and OUTB pins together since there is the possibility
that any delay between the two channels during turn-on or turn-off may result in shoot-through current
conduction as shown in Figure 33. While the two channels are inherently very well matched (4-ns Max
propagation delay), it should be noted that there may be differences in the input threshold voltage level between
the two channels which can cause the delay between the two outputs especially when slow dV/dt input signals
are employed. The following guidelines are recommended whenever the two driver channels are paralleled using
direct connections between OUTA and OUTB along with INA and INB:
• Use very fast dV/dt input signals (20 V/µs or greater) on INA and INB pins to minimize impact of differences
in input thresholds causing delays between the channels.
• INA and INB connections must be made as close to the device pins as possible.
Wherever possible, a safe practice would be to add an option in the design to have gate resistors in series with
OUTA and OUTB. This allows the option to use 0-Ω resistors for paralleling outputs directly or to add appropriate
series resistances to limit shoot-through current, should it become necessary.
VDD
VDD
200 kW
ENA
200 kW
1
8
ISHOOT-THROUGH
VDD
Slow Input Signal
INA
2
VIN_H
(Channel B)
7
400 kW
VIN_H
(Channel A)
VDD
INB
3
OUTA
VDD
UVLO
GND
ENB
VDD
6
VDD
4
5
OUTB
400 kW
Figure 33. Slow Input Signal May Cause Shoot-Through Between Channels During Paralleling
(recommended dV/dt is 20 V/µs or higher)
Copyright © 2011–2012, Texas Instruments Incorporated
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21
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SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
22
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Figure 34. Turn-On Propagation Delay
(CL = 1.8 nF, VDD = 12 V)
Figure 35. Turn-On Rise Time
(CL = 1.8 nF, VDD = 12 V)
Figure 36. . Turn-Off Propagation Delay
(CL = 1.8 nF, VDD = 12 V)
Figure 37. Turn-Off Fall Time
(CL = 1.8 nF, VDD = 12 V)
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UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
Drive Current and Power Dissipation
The UCC27523/4/5/6 family of drivers are capable of delivering 5-A of current to a MOSFET gate for a period of
several hundred nanoseconds at VDD = 12 V. High peak current is required to turn the device ON quickly. Then,
to turn the device OFF, the driver is required to sink a similar amount of current to ground. This repeats at the
operating frequency of the power device. The power dissipated in the gate driver device package depends on the
following factors:
• Gate charge required of the power MOSFET (usually a function of the drive voltage VGS, which is very close
to input bias supply voltage VDD due to low VOH drop-out)
• Switching frequency
• Use of external gate resistors
Since UCC2752x features very low quiescent currents and internal logic to eliminate any shoot-through in the
output driver stage, their effect on the power dissipation within the gate driver can be safely assumed to be
negligible.
When a driver device is tested with a discrete, capacitive load it is a fairly simple matter to calculate the power
that is required from the bias supply. The energy that must be transferred from the bias supply to charge the
capacitor is given by:
1
EG = CLOAD VDD2
2
(1)
where is load capacitor and is bias voltage feeding the driver.
There is an equal amount of energy dissipated when the capacitor is charged. This leads to a total power loss
given by the following:
PG = CLOAD VDD2 fSW
(2)
where fSW is the switching frequency.
With VDD = 12 V, CLOAD = 10 nF and ƒSW = 300 kHz the power loss can be calculated as:
PG = 10nF ´ 12 V 2 ´ 300kHz = 0.432 W
Copyright © 2011–2012, Texas Instruments Incorporated
(3)
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23
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SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
www.ti.com
The switching load presented by a power MOSFET can be converted to an equivalent capacitance by examining
the gate charge required to switch the device. This gate charge includes the effects of the input capacitance plus
the added charge needed to swing the drain voltage of the power device as it switches between the ON and OFF
states. Most manufacturers provide specifications that provide the typical and maximum gate charge, in nC, to
switch the device under specified conditions. Using the gate charge Qg, one can determine the power that must
be dissipated when charging a capacitor. This is done by using the equivalence Qg = CLOADVDD to provide the
following equation for power:
PG = CLOAD VDD2 fSW = Qg VDD fSW
(4)
Assuming that UCC2752x is driving power MOSFET with 60 nC of gate charge (Qg = 60 nC at VDD = 12 V) on
each output, the gate charge related power loss can be calculated as:
PG = 2 x 60nC ´ 12 V ´ 300kHz = 0.432 W
(5)
This power PG is dissipated in the resistive elements of the circuit when the MOSFET is being turned-on or off.
Half of the total power is dissipated when the load capacitor is charged during turn-on, and the other half is
dissipated when the load capacitor is discharged during turn-off. When no external gate resistor is employed
between the driver and MOSFET/IGBT, this power is completely dissipated inside the driver package. With the
use of external gate drive resistors, the power dissipation is shared between the internal resistance of driver and
external gate resistor in accordance to the ratio of the resistances (more power dissipated in the higher
resistance component). Based on this simplified analysis, the driver power dissipation during switching is
calculated as follows:
æ
ö
ROFF
RON
PSW = QG ´ VDD ´ fSW ´ ç
+
÷
è ROFF + RGATE RON + RGATE ø
(6)
where ROFF = ROL and RON (effective resistance of pull-up structure) = 1.5 x ROL.
In addition to the above gate charge related power dissipation, additional dissipation in the driver is related to the
power associated with the quiescent bias current consumed by the device to bias all internal circuits such as
input stage (with pull-up and pull-down resistors), enable, and UVLO sections. Referring to the Figure 11 it can
be seen that the quiescent current is less than 0.6 mA even in the highest case. The quiescent power dissipation
can be simply calculated as:
PQ = IDD VDD
(7)
Assuming , IDD = 6 mA, the power loss is:
PQ = 0.6 mA ´ 12 V = 7.2mW
(8)
Clearly, this is insignificant compared to gate charge related power dissipation calculated earlier.
With a 12-V supply, the bias current can be estimated as follows, with an additional 0.6-mA overhead for the
quiescent consumption:
P
0.432 W
IDD ~ G =
= 0.036 A
VDD
12 V
(9)
24
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Product Folder Link(s): UCC27523, UCC27524, UCC27525, UCC27526
UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
Thermal Information
The useful range of a driver is greatly affected by the drive power requirements of the load and the thermal
characteristics of the device package. In order for a gate driver device to be useful over a particular temperature
range the package must allow for the efficient removal of the heat produced while keeping the junction
temperature within rated limits. The UCC27523/4/5/6 family of drivers is available in four different packages to
cover a range of application requirements. The thermal metrics for each of these packages are summarized in
the Thermal Information section of the datasheet. For detailed information regarding the thermal information
table, please refer to Application Note from Texas Instruments entitled, "IC Package Thermal Metrics" (Texas
Instrument's Literature Number SPRA953A).
Among the different package options available in the UCC2752x family, of particular mention are the DSD &
DGN packages when it comes to power dissipation capability. The MSOP PowerPAD-8 (DGN) package and 3mm x 3-mm WSON (DSD) package offer a means of removing the heat from the semiconductor junction through
the bottom of the package. Both these packages offer an exposed thermal pad at the base of the package. This
pad is soldered to the copper on the printed circuit board directly underneath the device package, reducing the
thermal resistance to a very low value. This allows a significant improvement in heat-sinking over that available in
the D or P packages. The printed circuit board must be designed with thermal lands and thermal vias to complete
the heat removal subsystem. Note that the exposed pads in the MSOP-8 (PowerPAD™) and WSON-8 packages
are not directly connected to any leads of the package. However, it is electrically and thermally connected to the
substrate of the device which is the ground of the device. It is recommended to externally connect the exposed
pads to GND in PCB layout for better EMI immunity.
Copyright © 2011–2012, Texas Instruments Incorporated
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25
UCC27523, UCC27524, UCC27525, UCC27526
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
www.ti.com
PCB Layout
Proper PCB layout is extremely important in a high current, fast switching circuit to provide appropriate device
operation and design robustness. The UCC27523/4/5/6 family of gate drivers incorporates short propagation
delays and powerful output stages capable of delivering large current peaks with very fast rise and fall times at
the gate of power MOSFET to facilitate voltage transitions very quickly. At higher VDD voltages, the peak current
capability is even higher (5-A peak current is at VDD = 12 V). Very high di/dt can cause unacceptable ringing if
the trace lengths and impedances are not well controlled. The following circuit layout guidelines are strongly
recommended when designing with these high-speed drivers.
• Locate the driver device as close as possible to power device in order to minimize the length of high-current
traces between the Output pins and the Gate of the power device.
• Locate the VDD bypass capacitors between VDD and GND as close as possible to the driver with minimal
trace length to improve the noise filtering. These capacitors support high peak current being drawn from VDD
during turn-on of power MOSFET. The use of low inductance SMD components such as chip resistors and
chip capacitors is highly recommended.
• The turn-on and turn-off current loop paths (driver device, power MOSFET and VDD bypass capacitor) should
be minimized as much as possible in order to keep the stray inductance to a minimum. High dI/dt is
established in these loops at 2 instances – during turn-on and turn-off transients, which will induce significant
voltage transients on the output pin of the driver device and Gate of the power MOSFET.
• Wherever possible parallel the source and return traces, taking advantage of flux cancellation
• Separate power traces and signal traces, such as output and input signals.
• Star-point grounding is a good way to minimize noise coupling from one current loop to another. The GND of
the driver should be connected to the other circuit nodes such as source of power MOSFET, ground of PWM
controller etc at one, single point. The connected paths should be as short as possible to reduce inductance
and be as wide as possible to reduce resistance.
• Use a ground plane to provide noise shielding. Fast rise and fall times at OUT may corrupt the input signals
during transition. The ground plane must not be a conduction path for any current loop. Instead the ground
plane must be connected to the star-point with one single trace to establish the ground potential. In addition
to noise shielding, the ground plane can help in power dissipation as well
• In noisy environments, it may be necessary to tie inputs of an unused channel of UCC27526 to VDD (in case
of INx+) or GND (in case of INX-) using short traces in order to ensure that the output is enabled and to
prevent noise from causing malfunction in the output.
• Exercise caution when replacing the UCC2732x/UCC2742x devices with the UCC2752x:
– UCC2752x is a much stronger gate driver (5-A peak current versus 4-A peak current).
– UCC2752x is a much faster gate driver (13-ns/13-ns rise/fall propagation delay versus 25-ns/35-ns rise/fall
propagation delay).
26
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Product Folder Link(s): UCC27523, UCC27524, UCC27525, UCC27526
UCC27523, UCC27524, UCC27525, UCC27526
www.ti.com
SLUSAQ3E – NOVEMBER 2011 – REVISED JUNE 2012
Revision History
Changes from Original (November 2011) to Revision A
•
Page
Changed datasheet status to Production Data. .................................................................................................................... 1
Changes from Revision A (November 2011) to Revision B
Page
•
Added note to packaging section, "DSD package is rated MSL level 2". ............................................................................. 2
•
Changed Supply start threshold row to include two temperature ranges. ............................................................................ 5
•
Changed Minimum operating voltage after supply start min and max values from 3.6 V to 4.2 V to 3.40 V and 4.40
V. ........................................................................................................................................................................................... 5
•
Changed Supply voltage hysteresis typ value from 0.35 to 0.30. ........................................................................................ 5
•
Changed UCC27526 Block Diagram drawing. ................................................................................................................... 10
•
Changed UCC27526 Channel A in Inverting and Channel B in Non-Inverting Configuration drawing. ............................. 15
Changes from Revision B ( December 2011) to Revision C
Page
•
Added ROH note in the Outputs (OUTA, OUTB) section. ...................................................................................................... 5
•
Added an updated Output Stage section. ........................................................................................................................... 20
•
Added UCC2752X Gate Driver Output Structure image .................................................................................................... 20
•
Added an updated Low Propagation Delays and Tightly Matched Outputs section. ......................................................... 21
•
Added Slow Input Signal Combined with Differences in Input Threshold Voltage image. ................................................. 21
•
Added updated Drive Current and Power Dissipation section. ........................................................................................... 23
•
Added a PSW... equation. .................................................................................................................................................. 24
Changes from Revision C (March 2012) to Revision D
Page
•
Changed Inputs (INA, INB, INA+, INA-, INB+, INB-) section to include UCC2752X (D, DGN, DSD) information. .............. 5
•
Added Inputs (INA, INB, INA+, INA-, INB+, INB-) UCC27524P ONLY section. ................................................................... 5
•
Changed Enable (ENA, ENB) section to include UCC2752X (D, DGN, DSD) information. ................................................. 5
•
Added ENABLE (ENA, ENB) UCC27524P ONLY section. .................................................................................................. 5
Changes from Revision D (April 2012) to Revision E
Page
•
Added OUTA, OUTB voltage field and values. ..................................................................................................................... 3
•
Changed table note from "Values are verified by characterization and are not production tested." to "Values are
verified by characterization on bench." ................................................................................................................................. 3
•
Added note, "Values are verified by characterization and are not production tested." ........................................................ 3
•
Changed Switching Time tPW values from 10 ns and 25 ns to 15 ns and 25 ns ns. ............................................................ 5
•
Changed Functional Block Diagrams images. ...................................................................................................................... 9
•
Changed Slow Input Signal Figure 33. ............................................................................................................................... 21
Copyright © 2011–2012, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): UCC27523, UCC27524, UCC27525, UCC27526
27
PACKAGE OPTION ADDENDUM
www.ti.com
22-Jun-2012
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
(Requires Login)
UCC27523D
PREVIEW
SOIC
D
8
75
Green (RoHS
& no Sb/Br)
UCC27523DGN
PREVIEW
MSOPPowerPAD
DGN
8
80
TBD
Call TI
Call TI
UCC27523DGNR
PREVIEW
MSOPPowerPAD
DGN
8
2500
TBD
Call TI
Call TI
UCC27523DR
PREVIEW
SOIC
D
8
2500
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
UCC27523DSDR
PREVIEW
SON
DSD
8
3000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27523DSDT
PREVIEW
SON
DSD
8
250
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27524D
ACTIVE
SOIC
D
8
75
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
UCC27524DGN
ACTIVE
MSOPPowerPAD
DGN
8
80
Green (RoHS
& no Sb/Br)
CU NIPDAUAGLevel-1-260C-UNLIM
UCC27524DGNR
ACTIVE
MSOPPowerPAD
DGN
8
2500
Green (RoHS
& no Sb/Br)
CU NIPDAUAGLevel-1-260C-UNLIM
UCC27524DR
ACTIVE
SOIC
D
8
2500
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
UCC27524DSDR
ACTIVE
SON
DSD
8
3000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27524DSDT
ACTIVE
SON
DSD
8
250
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27524P
ACTIVE
PDIP
P
8
50
Green (RoHS
& no Sb/Br)
CU NIPDAU N / A for Pkg Type
UCC27525D
PREVIEW
SOIC
D
8
75
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
UCC27525DGN
PREVIEW
MSOPPowerPAD
DGN
8
80
TBD
Call TI
Call TI
UCC27525DGNR
PREVIEW
MSOPPowerPAD
DGN
8
2500
TBD
Call TI
Call TI
UCC27525DR
PREVIEW
SOIC
D
8
2500
Green (RoHS
& no Sb/Br)
Addendum-Page 1
Samples
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
22-Jun-2012
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
UCC27525DSDR
PREVIEW
SON
DSD
8
3000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27525DSDT
PREVIEW
SON
DSD
8
250
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27526DSDR
ACTIVE
SON
DSD
8
3000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UCC27526DSDT
ACTIVE
SON
DSD
8
250
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
Samples
(Requires Login)
(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.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
20-Jun-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
UCC27524DGNR
MSOPPower
PAD
DGN
8
2500
330.0
12.4
5.3
3.4
1.4
8.0
12.0
Q1
UCC27524DSDR
SON
DSD
8
3000
330.0
12.4
3.3
3.3
1.1
8.0
12.0
Q2
UCC27524DSDT
SON
DSD
8
250
180.0
12.4
3.3
3.3
1.1
8.0
12.0
Q2
UCC27526DSDR
SON
DSD
8
3000
330.0
12.4
3.3
3.3
1.1
8.0
12.0
Q2
UCC27526DSDT
SON
DSD
8
250
180.0
12.4
3.3
3.3
1.1
8.0
12.0
Q2
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
20-Jun-2012
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
UCC27524DGNR
MSOP-PowerPAD
DGN
8
2500
364.0
364.0
27.0
UCC27524DSDR
SON
DSD
8
3000
346.0
346.0
29.0
UCC27524DSDT
SON
DSD
8
250
210.0
185.0
35.0
UCC27526DSDR
SON
DSD
8
3000
346.0
346.0
29.0
UCC27526DSDT
SON
DSD
8
250
210.0
185.0
35.0
Pack Materials-Page 2
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