14

12

8

OUT

CS

3

4

2

5

6

3V3

AGND

IN

CLF

ILIM

UCD7100PWP

Bias

Winding

VIN

VOUT

VDD

2

Isolation

Amplifier

PWMB

INT

Digital Controller

PWMA

VDD

AN2

AN3

AN1

AGND

Communication

UCD7100

www.ti.com

SLUS651C – MARCH 2005 – REVISED MAY 2010

Digital Control Compatible Single Low-Side ±4-A MOSFET Driver with Current Sense

Check for Samples: UCD7100

1

FEATURES

DESCRIPTION

2

•

Adjustable Current Limit Protection

The UCD7100 is a member of the UCD7K family of

digital control compatible drivers for applications

•

3.3-V, 10-mA Internal Regulator

utilizing digital control techniques or applications

•

DSP/µC Compatible Inputs

requiring fast local peak current limit protection.

•

Single ±4-A TrueDrive™ High Current Driver

The UCD7100 is a low-side ±4-A high-current

•

10-ns Typical Rise and Fall Times with 2.2-nF

MOSFET gate driver. It allows the digital power

Loads

controllers

such

as

UCD9110

or

UCD9501

to

•

25-ns Input-to-Output Propagation Delay

interface

to

the

power

stage

in

single

ended

topologies. It provides a cycle-by-cycle current limit

•

25-ns Current Sense to Output Delay

function with programmable threshold and a digital

•

Programmable Current Limit Threshold

output current limit flag which can be monitored by

•

Digital Output Current Limit Flag

the host controller. With a fast 25-ns cycle-by-cycle

current limit protection, the driver can turn off the

•

4.5-V to 15-V Supply Voltage Range

power stage in the unlikely event that the digital

•

Rated from -40°C to 105°C

system can not respond to a failure situation in time.

•

Lead(Pb)-Free Packaging

For fast switching speeds, the UCD7100 output stage

uses the TrueDrive™ output architecture, which

APPLICATIONS

delivers rated current of ±4 A into the gate of a

•

Digitally Controlled Power Supplies

MOSFET during the Miller plateau region of the

•

DC/DC Converters

switching transition. It also includes a 3.3-V, 10-mA

•

Motor Controllers

linear regulator to provide power to the digital

controller.

•

Line Drivers

TYPICAL APPLICATION DIAGRAMS

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.

2

TrueDrive, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.