UCD7201
www.ti.com
SLUS645B–FEBRUARY 2005–REVISED JULY 2005
Digital Control Compatible Dual Low-Side ±4 Amp MOSFET Drivers with Programmable
Common Current Sense
FEATURES
DESCRIPTION
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Adjustable Current Limit Protection
The UCD7201 is a member of the UCD7K family of
digital control compatible drivers for applications
utilizing digital control techniques or applications re-
quiring fast local peak current limit protection.
3.3-V, 10-mA Internal Regulator
DSP/µC Compatible Inputs
Dual ±4-A TrueDrive™ High Current Drivers
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
10-ns Typical Rise and Fall Times with 2.2-nF
Loads
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20-ns Input-to-Output Propagation Delay
25-ns Current Sense-to-Output Propagation
Delay
limit function for both driver channels,
a
programmable threshold and a digital output current
limit flag which can be monitored by the host control-
ler. With a fast cycle-by-cycle current limit protection,
the driver can turn off the power stage in the event of
an overcurrent condition.
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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
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 control-
ler.
Lead(Pb)-Free Packaging
APPLICATIONS
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Digitally Controlled Power Supplies
DC/DC Converters
Motor Controllers
Line Drivers
TYPICAL APPLICATION DIAGRAM (Push-Pull Converter)
VIN
Bias Winding
Bias Supply
VOUT
UCD7201PWP
DIGITAL
1
2
NC
NC 14
CONTROLLER
VDD
ADC1
VCC
3V3
13
PVDD 12
GND
PWMA
PWMB
4
3
5
6
7
AGND
IN1
OUT1 11
OUT2 10
ADC2
IN2
INTERRUPT or CCR
PWM or GPIO
ADC3
CLF
ILIM
PGND
CS
9
8
ADC4
Isolation
Amplifier
COMMUNICATION
(Programming & Status Reporting)
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.
is a registered 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 © 2005, Texas Instruments Incorporated