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Gate Driver. UCD7230A Datasheet

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Gate Driver. UCD7230A Datasheet
















UCD7230A Driver. Datasheet pdf. Equivalent













Part

UCD7230A

Description

Digital Control Compatible Synchronous Buck Gate Driver



Feature


UCD7230A www.ti.com SLUS995 – NOVEMB ER 2009 Digital Control Compatible Sync hronous Buck Gate Driver with Current S ense Conditioning Amplifier Check for S amples: UCD7230A FEATURES 1 •2 Input from Digital Controller Sets Operating Frequency and Duty Cycle • Up to 2-M Hz Switching Frequency • Dual Current Limit Protection with Independently Ad justable Thresholds • Fast.
Manufacture

Texas Instruments

Datasheet
Download UCD7230A Datasheet


Texas Instruments UCD7230A

UCD7230A; Current Sense Circuit with Adjustable B lanking Interval Prevents Catastrophic Current Levels • Digital Output Curre nt Limit Flag • Low Offset, Gain of 4 8, Differential Current Sense Amplifier • 3.3-V, 10-mA Internal Regulator Dual TrueDrive™ High-Current Driver s • 10-ns Typical Rise/Fall Times wit h 2.2-nF Loads • 4.5-V to 15.5-V Supp ly Voltage Range APPLICATIONS •.


Texas Instruments UCD7230A

Digitally-Controlled Synchronous-Buck P ower Stages for Single and Multi-Phase Applications • Especially Suited for Use with UCD91xx or UCD92xx Contollers • High-Current Multi-Phase VRM/EVRD R egulators for Desktop, Server, Telecom and Notebook Processors • Digitally-C ontrolled Synchronous-Buck Power Suppli es Using μCs or the TMS320™ DSP Fami ly DESCRIPTION The UCD7230A.


Texas Instruments UCD7230A

is one in the UCD7k family of digital c ontrol compatible drivers for applicati ons utilizing digital control technique s or applications requiring fast local peak current limit protection. The UCD7 230A is a MOSFET gate driver specifical ly designed for synchronous buck applic ations. It is ideally suited to provide the bridge between digital controllers such as the UCD91.





Part

UCD7230A

Description

Digital Control Compatible Synchronous Buck Gate Driver



Feature


UCD7230A www.ti.com SLUS995 – NOVEMB ER 2009 Digital Control Compatible Sync hronous Buck Gate Driver with Current S ense Conditioning Amplifier Check for S amples: UCD7230A FEATURES 1 •2 Input from Digital Controller Sets Operating Frequency and Duty Cycle • Up to 2-M Hz Switching Frequency • Dual Current Limit Protection with Independently Ad justable Thresholds • Fast.
Manufacture

Texas Instruments

Datasheet
Download UCD7230A Datasheet




 UCD7230A
UCD7230A
www.ti.com
SLUS995 – NOVEMBER 2009
Digital Control Compatible Synchronous Buck Gate Driver
with Current Sense Conditioning Amplifier
Check for Samples: UCD7230A
FEATURES
1
2 Input from Digital Controller Sets Operating
Frequency and Duty Cycle
• Up to 2-MHz Switching Frequency
• Dual Current Limit Protection with
Independently Adjustable Thresholds
• Fast Current Sense Circuit with Adjustable
Blanking Interval Prevents Catastrophic
Current Levels
• Digital Output Current Limit Flag
• Low Offset, Gain of 48, Differential Current
Sense Amplifier
• 3.3-V, 10-mA Internal Regulator
• Dual TrueDrive™ High-Current Drivers
• 10-ns Typical Rise/Fall Times with 2.2-nF
Loads
• 4.5-V to 15.5-V Supply Voltage Range
APPLICATIONS
• Digitally-Controlled Synchronous-Buck Power
Stages for Single and Multi-Phase
Applications
• Especially Suited for Use with UCD91xx or
UCD92xx Contollers
• High-Current Multi-Phase VRM/EVRD
Regulators for Desktop, Server, Telecom and
Notebook Processors
• Digitally-Controlled Synchronous-Buck Power
Supplies Using μCs or the TMS320™ DSP
Family
DESCRIPTION
The UCD7230A is one in the UCD7k family of digital
control compatible drivers for applications utilizing
digital control techniques or applications requiring fast
local peak current limit protection.
The UCD7230A is a MOSFET gate driver specifically
designed for synchronous buck applications. It is
ideally suited to provide the bridge between digital
controllers such as the UCD91xx or the UCD92xx
and the power stage. With cycle-by-cycle current limit
protection, the UCD7230A device protects the power
stage from faulty input signals or excessive load
currents.
V
V
IN
OUT
BIAS
I
MAX
CLF
18 16 17
VDD CSBIAS CS+
1 3V3
13 14 15 12 11 10
BST OUT1 SW PVDD OUT2 PGND
POS 8
NEG 9
2 AGND
UCD7230A
AO 7
IN 20
4 ILIM
5 CLF
SRE 19
IO 6
I
DLY
DLY 3
ILOAD
PWM
SRE
UDG-09162
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.
TMS320, TrueDrive are trademarks of Texas Instruments.
2
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 © 2009, Texas Instruments Incorporated




 UCD7230A
UCD7230A
SLUS995 – NOVEMBER 2009
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 (CONTINUED)
The UCD7230A includes high-side and low-side gate drivers which utilize Texas Instrument’s TrueDrive™ output
architecture. This architecture delivers rated current into the gate capacitance of a MOSFET during the Miller
plateau region of the switching. Furthermore, the UCD7230A offers a low offset differential amplifier with a fixed
gain of 48. This amplifier greatly simplifies the task of conditioning small current sense signals inherent in high
efficiency buck converters.
The UCD7230A includes a 3.3-V, 10-mA linear regulator to provide power to digital controllers such as the
UCD91xx. The UCD7230A is compatible with standard 3.3-V I/O ports of the UCD91xx, the TMS320™ family
DSPs, microprocessors, or ASICs.
The UCD7230A is offered in the space-saving QFN package. Package pin out has been carefully designed for
optimal board layout
TEMPERATURE RANGE
-40°C to + 125°C
ORDERING INFORMATION(1) (2)
PACKAGED DEVICES PACKAGE QUANTITY
DELIVERY MEDIA
QFN-20 (RGW)
250
3000
Small tape and reel
Large tape and reel
DEVICE NUMBER
UCD7230ARGWT
UCD7230ARGWR
(1) These products are packaged in Pb-Free and green lead finish of Pd-Ni-Au which is compatible with MSL level 1 between 255°C and
260°C peak reflow temperature to be compatible with either lead free or Sn/Pb soldering operations.
(2) QFN-20 (RGW) package is available taped and reeled only.
2
Submit Documentation Feedback
Product Folder Link(s): UCD7230A
Copyright © 2009, Texas Instruments Incorporated




 UCD7230A
UCD7230A
www.ti.com
SLUS995 – NOVEMBER 2009
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
Input voltage
VDD
BST
Supply current
VDD
OUT1
Output gate drive voltage
OUT1, BST
OUT2
OUT1 (sink)
Output gate drive current
OUT1 (source)
OUT2 (sink)
OUT2 (source)
SW
CS+
Analog input voltage
CSBIAS
POS, NEG
ILIM, DLY, I0
Analog output
A0
Digital I/O’s
IN, SRE, CLF
Electrostatic discharge, human body model(HBM)
Electrostatic discharge, charged device model (CDM)
Operating junction temperature, TJ
Storage temperature, Tstg
Lead temperature (soldering, 10 sec)
MIN
MAX
UNIT
16
V
VSW+16 V
20
mA
200
-1
36
V
-1
VVDD+0.3
4.0
-2.0
A
4.0
-4.0
-1
20
-0.3
20
-0.3
16
V
-0.3
5.6
-0.3
3.6
-0.3
3.6
V
-0.3
3.6
V
2
kV
500
V
-55
150
°C
-65
150
300
°C
(1) Stresses beyond those listed in this table may cause permanent damage to the device. These are stress ratings only and functional
operation of the device at these or any other condition beyond those indicated is not implied. Exposure to absolute maximum rated
conditions for extended periods may affect device reliability. All voltages are with respect to GND. Currents are positive into, negative
out of the specified terminal. Consult company packaging information for thermal limitations and considerations of packages.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
Input voltage
VDD
Switching Frequency
TA
Operating ambient temperature
MIN
TYP
MAX UNIT
4.75
12
15 V
200
500
2000 kHz
-40
85 °C
DISSIPATION RATINGS TABLE (2 OZ. TRACE AND COPPER PAD WITH SOLDER)(1)
PACKAGE
TA < 25°C
POWER RATING (W)
DERATING FACTOR
ABOVE TA = 25°C (mW/°C)
θJA
(°C/W)
20-pin RGW
2.4
24.0
41.7
(1) For more information on the RGW package and the test method, refer to TI technical brief, literature number SZZA017.
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): UCD7230A
Submit Documentation Feedback
3




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