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MOSFET Drivers. UCD7201 Datasheet

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Part

UCD7201

Description

Amp MOSFET Drivers



Feature


Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCD7201 SLUS645F – FEBRUAR Y 2005 – REVISED DECEMBER 2014 UCD720 1 Digital Control Compatible Dual Low-S ide ±4 Amp MOSFET Drivers with Program mable Common Current Sense 1 Features •1 Adjustable Current Limit Protectio n • 3.3-V, 10-mA Internal Regulator DSP/μC Compatible Inputs •.
Manufacture

Texas Instruments

Datasheet
Download UCD7201 Datasheet


Texas Instruments UCD7201

UCD7201; Dual ±4-A TrueDrive™ High Current Dr ivers • 10-ns Typical Rise and Fall T imes with 2.2-nF Loads • 20-ns Input- to-Output Propagation Delay • 25-ns C urrent Sense-to-Output Propagation Dela y • Programmable Current Limit Thresh old • Digital Output Current Limit Fl ag • 4.5-V to 15-V Supply Voltage Ran ge • Rated from -40°C to 105°C 3 D escription The UCD7201 is a member of.


Texas Instruments UCD7201

the UCD7K family of digital control com patible drivers for applications utiliz ing digital control techniques or appli cations requiring fast local peak curre nt limit protection. The UCD7201 includ es dual low-side ±4-A highcurrent MOSF ET gate drivers. It allows the digital power controllers such as UCD9110 or UC D9501 to interface to the power stage i n double ended topo.


Texas Instruments UCD7201

logies. It provides a cycle-by-cycle cur rent limit function for both driver cha nnels, a programmable threshold and a d igital output current limit flag which can be monitored by the host controller . With a fast cycle-by-cycle current li mit protection, the driver can turn off the power stage in the event of an ove rcurrent condition. 2 Applications • Digitally Controlle.





Part

UCD7201

Description

Amp MOSFET Drivers



Feature


Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCD7201 SLUS645F – FEBRUAR Y 2005 – REVISED DECEMBER 2014 UCD720 1 Digital Control Compatible Dual Low-S ide ±4 Amp MOSFET Drivers with Program mable Common Current Sense 1 Features •1 Adjustable Current Limit Protectio n • 3.3-V, 10-mA Internal Regulator DSP/μC Compatible Inputs •.
Manufacture

Texas Instruments

Datasheet
Download UCD7201 Datasheet




 UCD7201
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
UCD7201
SLUS645F – FEBRUARY 2005 – REVISED DECEMBER 2014
UCD7201 Digital Control Compatible Dual Low-Side ±4 Amp MOSFET Drivers with
Programmable Common Current Sense
1 Features
1 Adjustable Current Limit Protection
• 3.3-V, 10-mA Internal Regulator
• DSP/μC Compatible Inputs
• Dual ±4-A TrueDrive™ High Current Drivers
• 10-ns Typical Rise and Fall Times with 2.2-nF
Loads
• 20-ns Input-to-Output Propagation Delay
• 25-ns Current Sense-to-Output Propagation Delay
• Programmable Current Limit Threshold
• Digital Output Current Limit Flag
• 4.5-V to 15-V Supply Voltage Range
• Rated from -40°C to 105°C
3 Description
The UCD7201 is a member of the UCD7K family of
digital control compatible drivers for applications
utilizing digital control techniques or applications
requiring fast local peak current limit protection.
The UCD7201 includes dual low-side ±4-A high-
current MOSFET gate drivers. It allows the digital
power controllers such as UCD9110 or UCD9501 to
interface to the power stage in double ended
topologies. It provides a cycle-by-cycle current limit
function for both driver channels, a programmable
threshold and a digital output current limit flag which
can be monitored by the host controller. With a fast
cycle-by-cycle current limit protection, the driver can
turn off the power stage in the event of an
overcurrent condition.
2 Applications
• Digitally Controlled Power Supplies
• DC/DC Converters
• Motor Controllers
• Line Drivers
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCD7201
HTSSOP (14)
4.40 mm x 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Diagram (Push-Pull Converter)
VIN
Bias Winding
Bias Supply
DIGITAL
CONTROLLER
UCD7201PWP
1 NC
NC 14
ADC1
VCC
2 3V3
VDD 13
VOUT
GND
ADC2
PWMA
PWMB
INTERRUPT or CCR
PWM or GPIO
ADC3
ADC4
4 AGND
PVDD 12
3 IN1
OUT1 11
5 IN2
OUT2 10
6 CLF
PGND 9
7 ILIM
CS 8
COMMUNICATION
(Programming & Status Reporting)
Isolation
Amplifier
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




 UCD7201
UCD7201
SLUS645F – FEBRUARY 2005 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (Continued) ........................................ 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 Handling Ratings....................................................... 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Typical Characteristics .............................................. 7
8 Detailed Description ............................................ 11
8.1 Overview ................................................................. 11
8.2 Functional Block Diagram ....................................... 11
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 13
9 Applications and Implementation ...................... 14
9.1 Application Information............................................ 14
9.2 Typical Applications ................................................ 14
10 Power Supply Recommendations ..................... 17
11 Layout................................................................... 18
11.1 Layout Guidelines ................................................. 18
11.2 Layout Example .................................................... 18
11.3 Thermal Considerations ........................................ 18
12 Device and Documentation Support ................. 19
12.1 Device Support .................................................... 19
12.2 Documentation Support ....................................... 19
12.3 Trademarks ........................................................... 19
12.4 Electrostatic Discharge Caution ............................ 19
12.5 Glossary ................................................................ 19
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
4 Revision History
DATE
March 2005
April 2005
July 2005
REVISION
SLUS645
SLUS645A
SLUS645B
October 2014 SLUS645F
CHANGE DESCRIPTION
Initial release of preliminary datasheet.
Updated packaging information.
Initial release of production datasheet. Updated specification and application information.
Added Handling Rating table, Feature Description section, Device Functional Modes, Application
and Implementation section, Power Supply Recommendations section, Layout section, Device and
Documentation Support section, and Mechanical, Packaging, and Orderable Information section.
2
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Product Folder Links: UCD7201
Copyright © 2005–2014, Texas Instruments Incorporated




 UCD7201
www.ti.com
UCD7201
SLUS645F – FEBRUARY 2005 – REVISED DECEMBER 2014
5 Description (Continued)
For fast switching speeds, the UCD7201 output stages use the TrueDrive™ output architecture, which delivers
rated current of ±4 A into the gate of a MOSFET during the Miller plateau region of the switching transition. It
also includes a 3.3-V, 10-mA linear regulator to provide power to the digital controller.
For similar applications requiring direct start-up capability from higher voltages such as the 48-V telecom input
line, the UCD7601 includes a 110-V high-voltage startup circuit.
The UCD7K driver family is compatible with standard 3.3-V I/O ports of DSPs, Microcontrollers, or ASICs.
UCD7201 is offered in a PowerPAD™ HTSSOP-14 package.
6 Pin Configuration and Functions
PIN
NO.
NAME
1
NC
2
3V3
3
IN1
4
AGND
5
IN2
6
CLF
7
ILIM
8
CS
9
PGND
10
OUT2
11
OUT1
12
PVDD
13
VDD
14
NC
PWP
14 PIN
Top View
NC
1
3V3
2
IN1
3
AGND
4
IN2
5
CLF
6
ILIM
7
14
NC
13
VDD
12
PVDD
11
OUT1
10
OUT2
9
PGND
8
CS
NC − No internal connection
Pin Functions
I/O
FUNCTION
-
No Connection
O
Regulated 3.3-V rail. The onboard linear voltage regulator is capable of sourcing up to 10 mA of
current. Place 0.22 μF of ceramic capacitance from this pin to ground.
The IN pin is a high impedance digital input capable of accepting 3.3-V logic level signals up to 2
I
MHz. There is an internal Schmitt trigger comparator which isolates the internal circuitry from any
external noise.
-
Analog ground return.
The IN pin is a high impedance digital input capable of accepting 3.3-V logic level signals up to 2
I
MHz. There is an internal Schmitt trigger comparator which isolates the internal circuitry from any
external noise.
Current limit flag. When the CS level is greater than the ILIM voltage minus 25 mV, the output of the
O
driver is forced low and the current limit flag (CLF) is set high. The CLF signal is latched high until the
device receives the next rising edge on the IN pin.
I
Current limit threshold set pin. The current limit threshold can be set to any value between 0.25 V
and 1.0 V. The default value while open is 0.5 V.
I
Current sense pin. Fast current limit comparator connected to the CS pin is used to protect the power
stage by implementing cycle-by-cycle current limiting.
-
Power ground return. The pin should be connected very closely to the source of the power MOSFET.
O
The high-current TrueDrive™ driver output.
O
The high-current TrueDrive™ driver output.
I
Supply pin provides power for the output drivers. It is not connected internally to the VDD supply rail.
The bypass capacitor for this pin should be returned to PGND.
I
Supply input pin to power the driver. The UCD7K devices accept an input range of 4.5 V to 15 V.
Bypass the pin with at least 4.7 μF of capacitance, returned to AGND.
-
No Connection.
Copyright © 2005–2014, Texas Instruments Incorporated
Product Folder Links: UCD7201
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