UCD7201_13 Datasheet, PDF (1/25 Pages) Texas Instruments – Digital Control Compatible Dual Low-Side ±4 Amp MOSFET Drivers with Programmable Common Current Sense

UCD7201
www.ti.com
SLUS645E – FEBRUARY 2005 – REVISED NOVEMBER 2009
Digital Control Compatible Dual Low-Side ±4 Amp MOSFET Drivers with Programmable
Common Current Sense
Check for Samples: UCD7201
FEATURES
1
DESCRIPTION
•2 Adjustable Current Limit Protection
The UCD7201 is a member of the UCD7K family of
• 3.3-V, 10-mA Internal Regulator
digital control compatible drivers for applications
• 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
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
• 25-ns Current Sense-to-Output Propagation
Delay
• Programmable Current Limit Threshold
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
• Digital Output Current Limit Flag
controller. With a fast cycle-by-cycle current limit
• 4.5-V to 15-V Supply Voltage Range
• Rated from -40°C to 105°C
protection, the driver can turn off the power stage in
the event of an overcurrent condition.
For fast switching speeds, the UCD7201 output
APPLICATIONS
stages use the TrueDrive™ output architecture, which
• Digitally Controlled Power Supplies
• DC/DC Converters
• Motor Controllers
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
• Line Drivers
controller.
TYPICAL APPLICATION DIAGRAM (Push-Pull Converter)
VIN
DIGITAL
CONTROLLER
Bias Supply
Bias Winding
UCD7201PWP
1 NC
NC 14
ADC1
VCC
2 3V3
VDD 13
GND
ADC2
PWMA
PWMB
INTERRUPT or CCR
PWM or GPIO
4 AGND
PVDD 12
3 IN1
OUT1 11
5 IN2
OUT2 10
6 CLF
PGND 9
7 ILIM
CS 8
ADC3
ADC4
COMMUNICATION
(Programming & Status Reporting)
VOUT
Isolation
Amplifier
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.
TrueDrive, PowerPAD 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 © 2005–2009, Texas Instruments Incorporated