TI TMP814

TMP814
www.ti.com........................................................................................................................................................................................................ SLDS151 – MAY 2009
VARIABLE SPEED SINGLE-PHASE FULL-WAVE FAN MOTOR PRE-DRIVER
FEATURES
1
•
•
•
•
•
•
PW PACKAGE
Pre-Driver for Single-Phase Full-Wave Drive
(TOP VIEW)
– PNP-NMOS is Used as an External Power
20
1
OUT1P
OUT2P
TR, Enabling High-Efficiency
19
2
OUT1N
OUT2N
VCC
18
3
VOVER
Low-Consumption Drive by Means of the
17
4
SGND
VLIM
Low-Saturation Output and Single-Phase
5
16
6VREG
SENSE
Full-Wave Drive (PMOS-NMOS Also
15
6
ROFF
RMI
7
14
CT
VTH
Applicable)
13
8
IN+
CPWM
External PWM Input Enabling Variable Speed
9
12
HB
FG
Control
10
11
IN–
RD
– Separately-Excited Upper Direct PWM (f =
25 kHz) Control Method, Enabling Highly
DESCRIPTION/
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
– Minimum Speed Can Be Set With External
Resistor. Start Assistance Circuit Enables
Start at Extremely Low Speed.
Constant-Voltage Output Pin for Hall Bias
Lock Protection and Automatic Reset
Functions Incorporated
FG (Rotation Speed Detection) and RD (Lock
Detection) Output
ORDERING INFORMATION (1)
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<br/>
<br/>
<br/>
•
•
<br/>
<br/>
<br/>
<br/>
•
<br/>
PACKAGE (2)
TA
-30°C to 95°C
(1)
(2)
TSSOP – PW
Reel of 2000
ORDERABLE PART NUMBER
TMP814PWR
TOP-SIDE MARKING
TMP814
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.
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
TMP814
SLDS151 – MAY 2009........................................................................................................................................................................................................ www.ti.com
BLOCK DIAGRAM
CT
Discharge Circuit
0.47 µF
to 1 µF
FG
RD
Discharge
Pulse
VCC
6VREG
6VREG
OUT1N
OUT1P
ROFF
Hall
Controller
Hall Bias
HB
Hysteresis
Amplifier
IN+
IN–
OUT2N
OUT2P
Thermal Shutdown
Oscillator
RMI VTH
VLIM SENSE
CPWM
SGND
TRUTH TABLE
During full-speed rotation
IN–
IN+
CT
OUT1P
OUT1N
OUT2P
OUT2N
FG
RD
MODE
H
L
L
L
–
–
H
L
L
OUT1 → 2 drive
L
H
–
H
L
–
OFF
H
L
L
H
VTH
2
H
CPWM
L
H
H
L
OFF
–
–
H
L
–
H
OFF
–
OFF
OUT2 → 1 drive
OFF
Lock protection
IN–
IN+
OUT1P
OUT1N
OUT2P
OUT2N
MODE
H
L
L
–
–
H
OUT1 → 2 Drive
L
H
–
H
L
–
OUT2 → 1 Drive
H
L
OFF
–
–
H
L
H
–
H
OFF
–
During rotation,
regeneration in lower TR
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Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TMP814
TMP814
www.ti.com........................................................................................................................................................................................................ SLDS151 – MAY 2009
TERMINAL FUNCTIONS
TERMINAL
NO.
NAME
I/O
DESCRIPTION
1
OUT2P
O
Upper-side driver output
2
OUT2N
O
Lower-side driver output
Power supply. For the CM capacitor that is a power stabilization capacitor for PWM drive and for
absorption of kickback, the capacitance of 0.1 µF to 1 µF is used. In this device, the lower TR
performs current regeneration by switching the upper TR. Connect CM between VCC and GND,
with the thick pattern and along the shortest route. Use a zener diode if kickback causes
excessive increase of the supply voltage, because such increase may damage the device.
3
VCC
4
VLIM
I
Activates the current limiter when SENSE voltage is higher than VLIM voltage. Connect to
6VREG when not used.
5
SENSE
I
Sense input. Connect to GND when not used.
6
RMI
I
Minimum speed setting. Connect to 6VREG when not used. If device power can be removed
before power is removed from RMI, insert a current limiting resistor to prevent inflow of large
current.
7
VTH
I
VTH voltage is generated by filtering the PWM-IN input. If device power can be removed before
power is removed from VTH, insert a current limiting resistor to prevent inflow of large current.
8
CPWM
O
Connect to capacitor CP to set the PWM oscillation frequency. With CP = 100 pF, oscillation
occurs at 25 kHz and provides the basic frequency of PWM.
9
FG
O
Open collector output, which can detect the rotation speed using the FG output according to the
phase shift. Leave open when not used.
10
RD
O
Open collector output. Outputs low during rotation and high at stop. Leave open when not used.
11
IN–
I
Hall input
12
HB
O
This is a Hall element bias, that is, the 1.5-V constant-voltage output.
13
IN+
I
Hall input. Make connecting traces as short as possible to prevent carrying of noise. To futher
limit noise, insert a capacitor between IN+ and IN–. The Hall input circuit is a comparator having
a hysteresis of 20 mV. The application should ensure that the Hall input level more than three
times (60 mVp-p) this hysteresis.
14
CT
O
Lock detection time setting. Capacitor CT is connected.
15
ROFF
I
Sets the soft switching time to cut the reactive current before phase change. Connect to 6VREG
when not used.
16
6VREG
O
6-V regulator output
17
SGND
18
VOVER
O
Constant-voltage bias and should be used for application of 24 V and 48 V (see Figure 2). A
current limiting resistor should be used. Leave open when not used.
19
OUT1N
O
Lower-side driver output
20
OUT1P
O
Upper-side driver output
Connected to the control circuit power supply system.
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Product Folder Link(s): TMP814
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TMP814
SLDS151 – MAY 2009........................................................................................................................................................................................................ www.ti.com
ABSOLUTE MAXIMUM RATINGS (1)
over operating free-air temperature range (unless otherwise noted)
VALUE
UNIT
18
V
OUT1P, OUT1N, OUT2P, OUT2N
18
V
Continuous output current
OUT1P, OUT1N, OUT2P, OUT2N
50
mA
Continuous output current
HB
10
mA
VTH
Input voltage
VTH
8
V
VRD
VFG
Output voltage
RD, FG
18
V
IRD
IFG
Continuous output current
RD, FG
10
mA
θJA
Package thermal impedance (2)
83
°C/W
Tstg
Storage temperature range
–65 to 150
°C
VCC
Supply voltage
VOUT
Output voltage
IOUT
IHB
(1)
(2)
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
RECOMMENDED OPERATING CONDITIONS
TA = 25°C
VCC
Supply voltage
VTH
VTH input voltage
VICM
Hall input common phase input voltage
TA
Operating free-air temperature
MIN
MAX
6
16
V
0
7
V
0.2
3
V
–30
95
°C
MIN
TYP
MAX
UNIT
5.8
6
6.15
V
Full-speed mode
UNIT
ELECTRICAL CHARACTERISTICS
VCC = 12 V, TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V6VREG
Output voltage
6VREG
VVOVER
Output voltage
VOVER
VCRH
High-level output voltage
VCRL
Low-level output voltage
fPWM
Oscillation frequency
18
25
32
kHz
VCTH
High-level output voltage
3.4
3.6
3.8
V
VCTL
Low-level output voltage
1.4
1.6
1.8
V
ICT1
Charge current
1.6
2
2.5
µA
ICT2
Discharge current
0.16
0.2
0.28
µA
RCT
Charge/discharge current ratio
8
10
12
VON
Output voltage
OUT_N
4
10
V
IOP
Sink current
OUT_P
15
20
mA
VHN
Hall input sensitivity
VRD
VFG
Low-level output voltage
IRDL
IFGL
Output leakage current
ICC
Supply current
4
IHB = 5 mA
CPWM
CP = 100 pF
CT
H+, H-
IO = 20 mA
12
12.8
13.6
V
4.35
4.55
4.75
V
1.45
1.65
1.85
V
Zero peak value
(including offset and hysteresis)
IRD = 5 mA or IFG = 5 mA
10
20
mV
0.15
0.3
V
30
µA
RD, FG
VRD = 16 V or VFG = 16 V
During drive
4
10
14
During lock protection
4
10
14
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mA
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TMP814
TMP814
www.ti.com........................................................................................................................................................................................................ SLDS151 – MAY 2009
APPLICATION INFORMATION
CB = ~ 0.022 µF
RB = 10 kW
ROUT = 100 W
SOP8901
RF
RFG, RRD = 10 kW to 100 W
VCC
6VREG
H
VOVER
RD
HB
FG
IN–
SENSE
IN+
VLIM
RMI
6VREG
VTH
OUT1P
ROFF
R = 0 to 5 kW
OUT1N
PWM-IN
CPWM
CP = 100 pF
25 kHz
OUT2P
CT
OUT2N
SGND
CT = 0.47 µF
Figure 1. 12-V Sample Application Circuit
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TMP814
SLDS151 – MAY 2009........................................................................................................................................................................................................ www.ti.com
RF
VCC
6VREG
H
VOVER
RD
HB
FG
IN–
SENSE
IN+
VLIM
RMI
6VREG
ROFF
VTH
OUT1P
OUT1N
PWM-IN
CP = 100 pF
CPWM
OUT2P
CT
OUT2N
SGND
CT = 0.47 µF
Figure 2. 24-V/48-V Sample Application Circuit
6
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Product Folder Link(s): TMP814
TMP814
www.ti.com........................................................................................................................................................................................................ SLDS151 – MAY 2009
f = 25 kHz (CP = 100 pF)
ON duty large
VTH voltage
4.55 V
RMI voltage
CPWM
1.65 V
ON duty small
PWM-IN disconnected
0V
Rotation set to
minimum speed
(stop mode)
PWM control
variable speed
Low speed
High speed
Full speed
12 V
VCC
0V
FG
A.
Minimum
speed
setting
(stop)
mode
PWM-IN input is filtered to generate the VTH voltage. At low speed, the fan rotates with the minimum speed set with
RMI during low speed. If the minimum speed is not set (RMI = 6VREG), the fan stops.
B.
Low
↔
high
speed
mode
PWM control is made through comparison of oscillation and VTH voltages with CPWM changing between 1.6 V ↔ 4.6
V.
Upper and lower TRs are turned ON when the VTH voltage is higher. The upper output TR is turned OFF when the
VTH voltage is lower, and the coil current is regenerated in the lower TR. Therefore, as the VTH voltage lowers, the
output ON duty increases, increasing the coil current and raising the motor speed. The rotation speed is fed back by
the FG output.
C.
Full
speed
mode
The full-speed mode becomes effective with the VTH voltage of 1.65 V or less. (VTH must be equal to GND when the
speed control is not used.)
D.
PWM-IN
input
disconnection
mode
When the PWM-IN input pin is disconnected, VTH becomes 1.65 V or less and the output enables full drive at 100%.
The fan runs at full speed (see Figure 1).
Figure 3. Control Timing
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PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jul-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
TMP814PWR
Package Package Pins
Type Drawing
TSSOP
PW
20
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
2000
330.0
16.4
Pack Materials-Page 1
6.95
B0
(mm)
K0
(mm)
P1
(mm)
7.1
1.6
8.0
W
Pin1
(mm) Quadrant
16.0
Q1
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jul-2012
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
TMP814PWR
TSSOP
PW
20
2000
367.0
367.0
38.0
Pack Materials-Page 2
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