Datasheet

UNISONIC TECHNOLOGIES CO., LTD
F2970
Preliminary
LINEAR INTEGRATED CIRCUIT
FOR FAN MOTOR
SINGLE-PHASE FULL-WAVE
DRIVER

DESCRIPTION
The UTC F2970 is a single-phase full-wave bipolar driver
control IC with excellent efficiency for fan motor.

SOP-18
FEATURES
* Single-phase full-wave drive (16V to 1.2A transistors are built in)
* Speed adjustment function by thermistor input and external
signal incorporated
→Enables silent and low-vibration variable speed control
through direct PWM control with separately-excited upper tR
* Kick-back absorption circuit are built in
* Current limiter function (The limiter value determined with Rf,
limit at IO=480mA with RL=1Ω connection,)
* Low-consumption, low-loss, and low-noise drive enabled by the
soft switching circuit during phase shift
* HB incorporated
* Lock protection and automatic reset functions incorporated
* FG (rotation detection) output
* Regeneration Di incorporated with less external parts
* Thermal shutdown circuit incorporated

ORDERING INFORMATION
Note:
Ordering Number
Lead Free
Halogen Free
F2970L-S18-T
F2970G-S18-T
F2970L-S18-R
F2970G-S18-R
xx: Output Voltage, refer to Marking Information.
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Copyright © 2013 Unisonic Technologies Co., Ltd
Package
Packing
SOP-18
SOP-18
Tube
Tape Reel
1 of 6
QW-R109-035.a
F2970

Preliminary
PIN CONFIGURATION
OUT2 1

LINEAR INTEGRATED CIRCUIT
18 P-GND
VM
2
17 OUT1
VCC
3
16 S-GND
WH
4
15 6VREG
WL
5
VTH
6
13 IN-
RMI
7
12 HB
P-IN
8
11
CPWM
9
10 FG
UTC
F2970
14 CT
IN+
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
PIN NAME
OUT2
VM
VCC
WH
WL
VTH
RMI
P-IN
CPWM
FG
IN+
HB
INCT
6VREG
S-GND
OUT1
P-GND
DESCRIPTION
Output2
Sense pin of current limiter
Power supply
OSC input
OSC output
Variable speed function input
Lowest speed setting voltage
Dricte PWM speed control pin
PWM oscillator frenquency setting capacitor
Speed detection output
The hall sensor input
Power the hall sensor 1.25V
The hall sensor input
Setting lock protection time
VREF 6V
Control system GND
Output1
Motor system GND
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F2970

Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
FG
Overheat
Protection
RMI
VTH
CPWM
P-IN
H: Rotation mode
Comparator
+
-
L: Regeneration
mode
Current
control
circuit
VCC
VM
OUT
Constant
voltage
Delay
circuit
6VREG
HB
+
Controller
1.25V
OUT
Delay
circuit
IN+
INHysteresis
AMP
S-GND
Oscillation
Charge/
discharge
CT
P-IN RMI VTH
WH WL CPWM
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P-GND
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
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Maximum supply Voltage VCC
VCC
17
V
Maximum supply Voltage VM
VM
17
V
OUT Pin Maximum Output Current
IOUT
1.2
A
OUT Pin Output Withstand Voltage
VOUT
18
V
Maximum Output Current of HB
IHB
10
mA
VTH, RMI Input Pin Withstand Voltage
VTH, RMI
7
V
P-IN Input Pin Withstand Voltage
VP-IN
VCC
V
FG Output Pin Output Withstand Voltage
VFG
18
V
FG Output Current
IFG
10
mA
Allowable Power Dissipation
Specified substrate (Note 1)
PD
0.8
W
Operating Temperature
TOPR
-30~90
°C
Storage Temperature
TSTG
-55~150
°C
Notes:
Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
1. Specified substrate: 30mm×30mm×0.8mm, paper phenol.

RECOMMENDED OPERATING RANGES (TA=25°C)
PARAMETER
VCC Supply Voltage
VM Supply Voltage
VTH, RMI Input Level Voltage Range
P-IN Input Level Voltage Range
Triangular Wave Input Range
Hall Input Common Phase Input Voltage Range

SYMBOL
VCC
VM
VTH, RMI
VP-IN
VRM
VICM
RATINGS
4.5~16
3.5~16
0~6
0~VCC
0.5~4
0.2~3
UNIT
V
V
V
V
V
V
ELECTRICAL CHARACTERISTICS (TA=25°C, VCC=12V, Rf=0Ω, unless otherwise specified.)
PARAMETER
Circuit Current
HB Voltage
6VREG Voltage
Pin-CT H Level Voltage
Pin-CT L Level Voltage
Pin-CT Charge Current
Pin-CT Discharge Current
CT Charge/Discharge Current Ratio
OUT Output L Saturation Voltage
OUT Output H Saturation Voltage
Current Limiter
SYMBOL
ICC1
ICC2
VHB
V6VREG
VCTH
VCTL
ICT1
ICT2
RCT
VOL
VOH
VRf
TEST CONDITIONS
During Drive
During Lock Protection
IHB=5mA
I6VREG=5mA
IO=200mA
IO=200mA, Rf=1Ω
Zero Peak Value (Including
Offset and Hysteresis)
FG Output Pin L Voltage
VFG
IFG=5mA
FG Output Pin Leak Current
IFGL
VFG=7V
Design Guarantee Value
Overheat Protection
THD
(Note 1)
Note: 1. Design target value and no measurement was made.
Sensitivity of Hall Input
VHN
UNISONIC TECHNOLOGIES CO., LTD
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MIN
12
11
1.12
5.85
3.4
1.4
TYP
15
14
1.22
5.95
3.6
1.6
2.2
0.22
6.8
0.1
0.6
480
MAX
18
17
1.32
6.10
3.8
1.8
UNIT
mA
mA
V
V
V
V
µA
µA
0.2
0.8
V
V
mV
10
20
mV
0.2
0.3
30
V
µA
180
°C
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
Preliminary
LINEAR INTEGRATED CIRCUIT
TRUTH TABLE
VTH
L
(OPEN)
PIN
ININ+
CT
L
H
L
L
L
H
L
L
H
L
H
L
L
H
H
H
L
L
H
L
H
H
L
H
L
H
H
Notes: 1.VTH, P-IN=L means VTH, P-IN<CPWM
2.VTH, P-IN=H means VTH, P-IN>CPWM
OUT1
H
L
OFF
L
OFF
L
OFF
L
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OUT2
L
H
L
OFF
L
OFF
L
OFF
FG
L
OFF
L
OFF
L
OFF
L
OFF
Mode
Running-Drive
Running-Regeneration
Output Regeneration Mode
with External Signal
Lock Protection
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
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
Rf
*4
CM
VCC
VCC
*8
Hall
IN-
*7
*5
FG
IN+
6VREG
*3-3
R6
OUT1
R4
PIN
*3-1
R5
*2
VM
HB
R1
C=2200~4700pF
R=20~50Ω
UTC
F2970
WH
PWM-IN
R7
R2
R3
WL
RTU
*3
*3-2
RMI
R8
CT
CT=0.47~1µF
R1
WH
R2
OUT2
VTH
PGND
TH
*1
WL
R3
CP=100pF
*f=25kHz
*6
CPWM
SGND
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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