TMP814 Datasheet, PDF (1/12 Pages) Texas Instruments – VARIABLE SPEED SINGLE-PHASE FULL-WAVE FAN MOTOR PRE-DRIVER

TMP814
www.ti.com........................................................................................................................................................................................................ SLDS151 – MAY 2009
VARIABLE SPEED SINGLE-PHASE FULL-WAVE FAN MOTOR PRE-DRIVER
FEATURES
1
• 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
OUT2P
OUT2N
V
CC
VLIM
SENSE
RMI
VTH
CPWM
FG
RD
PW PACKAGE
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
OUT1P
OUT1N
VOVER
SGND
6VREG
ROFF
CT
IN+
HB
IN–
– Separately-Excited Upper Direct PWM (f =
25 kHz) Control Method, Enabling Highly
Silent Speed Control
• Compatible with 12-V, 24-V, and 48-V Power
Supplies
• Current Limiter Circuit Incorporated
– Chopper Type Current Limit at Start
• Reactive Current Cut Circuit Incorporated
– Reactive Current Before Phase Change is
Cut to Enable Silent and Low-Consumption
Drive
• Minimum Speed Setting Pin
– Minimum Speed Can Be Set With External
Resistor. Start Assistance Circuit Enables
Start at Extremely Low Speed.
DESCRIPTION/
ORDERING INFORMATION
The TFAN212D004 is a single-phase bipolar variable
speed fan motor predriver that works with an external
PWM signal. A highly efficient, quiet and low power
consumption motor driver circuit, with a large variable
speed, can be implemented by adding a small
number of external components.
This device is optimal for driving large scale fan
motors (with large air volume and large current) such
as those used in servers and consumer products.
<br/>
<br/>
<br/>
<br/>
• Constant-Voltage Output Pin for Hall Bias
<br/>
• Lock Protection and Automatic Reset
<br/>
<br/>
Functions Incorporated
<br/>
• FG (Rotation Speed Detection) and RD (Lock
<br/>
Detection) Output
ORDERING INFORMATION⁽¹⁾
T_A
-30°C to 95°C
TSSOP – PW
PACKAGE ⁽²⁾
Reel of 2000
ORDERABLE PART NUMBER
TMP814PWR
TOP-SIDE MARKING
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated