1

FEATURES

DESCRIPTION

H+

A1

2

7

V

CC

A2

1

8

AL

LD

3

6

H–

GND

4

5

Logic

Regulator

+

–

+

–

Lock Detect/

Auto Restart

+

–

Hall

Amp

TMP821

SLDS152 – JANUARY 2008

www.ti.com

TWO-PHASE HALF-WAVE MOTOR PREDRIVER

BLOCK DIAGRAM

• Built-In Lock Detection and Rotational Speed

Sensing Mechanisms

• Compact 8-Pin Package Reduces Number of

External Components Required

• Automatic Restart When Motor Lock Is

Undone

• Hall Amplifier Inputs Have Hysteresis

The

TMP821

is

a

two-phase

half-wave

motor

predriver suited for fan motors.

ORDERABLE PART NUMBER

TOP-SIDE MARKING

–40

°C to 125°C

SOIC – D

Reel of 2500

TMP821DR

TMP821

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, 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.