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FEATURES

PW PACKAGE

(TOP VIEW)

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OUT2P

OUT2N

V

CC

VLIM

SENSE

RMI

VTH

CPWM

FG

RD

OUT1P

OUT1N

VOVER

SGND

6VREG

ROFF

CT

IN+

HB

IN–

DESCRIPTION/

TMP814

VARIABLE SPEED SINGLE-PHASE FULL-WAVE FAN MOTOR PRE-DRIVER

• Pre-Driver for Single-Phase Full-Wave Drive

–

PNP-NMOS is Used as an External Power

TR, Enabling High-Efficiency

Low-Consumption Drive by Means of the

Low-Saturation Output and Single-Phase

Full-Wave Drive (PMOS-NMOS Also

Applicable)

• External PWM Input Enabling Variable Speed

Control

–

Separately-Excited Upper Direct PWM (f =

25 kHz) Control Method, Enabling Highly

Silent Speed Control

ORDERING INFORMATION

• Compatible with 12-V, 24-V, and 48-V Power

The TFAN212D004 is a single-phase bipolar variable

Supplies

speed fan motor predriver that works with an external

• Current Limiter Circuit Incorporated

PWM signal. A highly efficient, quiet and low power

–

Chopper Type Current Limit at Start

consumption motor driver circuit, with a large variable

speed, can be implemented by adding a small

• Reactive Current Cut Circuit Incorporated

number of external components.

–

Reactive Current Before Phase Change is

This device is optimal for driving large scale fan

Cut to Enable Silent and Low-Consumption

motors (with large air volume and large current) such

Drive

as those used in servers and consumer products.

• Minimum Speed Setting Pin

<br/>

–

Minimum Speed Can Be Set With External

<br/>

Resistor. Start Assistance Circuit Enables

<br/>

<br/>

Start at Extremely Low Speed.

<br/>

• Constant-Voltage Output Pin for Hall Bias

<br/>

• Lock Protection and Automatic Reset

<br/>

Functions Incorporated

<br/>

<br/>

• FG (Rotation Speed Detection) and RD (Lock

Detection) Output

ORDERABLE PART NUMBER

TOP-SIDE MARKING

-30°C to 95°C

TSSOP – PW

Reel of 2000

TMP814PWR

TMP814

(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, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/package.

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 © 2009, 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.