UNISONIC TECHNOLOGIES CO., LTD
UM2640
Preliminary
CMOS IC
TWO-PHASE UNIPOLAR DC
BRUSHLESS MOTOR
PRE-DRIVER IC
DESCRIPTION
UTC
UM2640
is a 2-phase pre-driver IC for unipolar DC brushes
motors. It features high voltage bipolar technology so that the driver
works up to 48V. High voltage operation delivers more power and
improves power supply efficiency. Therefore, it is suitable for high
voltage fan motor applications.
FEATURES
* Wide supply voltage range of 4V~55V
* Absolute Maximum Voltage 60V
* Lock protection.
Auto-restart when the motor lock is undone.
* Lock Alarm Output Terminal
ORDERING INFORMATION
Ordering Number
Lead Free
UM2640L-SO8-R
UM2640L-SO8-T
Halogen Free
UM2640G-SO8-R
UM2640G-SO8-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
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UM2640
PIN CONFIGURATION
V
CC
1
Preliminary
CMOS IC
8 OUT2
H1 2
7 OUT1
LA 3
6 C
t
H2 4
5 GND
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
V
CC
H1
LA
H2
GND
C
t
OUT1
OUT2
DESCRIPTION
Supply voltage
Positive input for hall amplifiter
Lock alarm output
Negative input for hall amplifiter
Ground
Timing capacitance
Output voltage
Output voltage
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UM2640
BLOCK DIAGRAM
Preliminary
CMOS IC
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UM2640
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
(T
A
=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
60
V
Hall Input Voltage Range
V
IH
-0.3~V
CC
V
Output Current
I
OUT
30
mA
Lock Alarm Output Voltage
V
OLA
60
V
Hall Input Differential Voltage
V
IHD
2
V
Lock Alarm Output Current
I
OLA
20
mA
Power Dissipation
P
D
375
mW
Operating Temperature
T
OPR
-40~85
°C
Storage Temperature
T
STG
-55~150
°C
Note: 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.
ELECTRICAL CHARACTERISTICS
(V
CC
=48V, T
A
= 25°C)
PARAMETER
Operating Supply Voltage Range
Operating Current
Hall Input Hysterisis Range
Hall Amplifier Input Bias Current
Hall Input Common Mode Voltage
Output Voltage
Output Leak Current
Lock Alarm Output Voltage
Lock Alarm Leak Current
Ct Charge Current
Ct Discharge Current
Charge/Discharge Current Ratio
Ct H Level Cense Voltage
Ct L Level Cense Voltage
Auto Protection Release ON Time
Auto Protection Release OFF Time
SYMBOL
V
CC
I
CC
V
HYS
I
B
V
ICM
V
OUT
I
LEAK
V
LA
TEST CONDITIONS
V
CC
=24V
V
CC
=48V
8
1.5
I
OUT
=10mA
V
CC
=60V
Lock Alarm ON, I
LA
=5mA
V
LA
=60V
V
Ct
=1.5V
V
Ct
=1.5V
4.0
2.2
0.6
Vcc-1.5
5
0.5
10
3.8
0.75
5.5
2.5
0.7
0.25
1.25
MIN
4.0
TYP
48.0
3.0
3.8
20
0.5
MAX
55.0
4.0
4.8
32
1.0
Vcc-2
UNIT
V
mA
mV
µA
V
V
µA
V
µA
µA
µA
V
V
s
s
I
LA-LEAK
I
CHG
I
DCHG
I
CHG
/I
DCHG
V
CtH
V
CtL
T
ON
C
t
=0.47µF
T
OFF
C
t
=0.47µF
8.0
2.8
0.8
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UM2640
APPLICATION INFORMATION
Preliminary
CMOS IC
The UTC
UM2640
is a two-phase
unipolar DC brushes motor
pre-driver IC
that features high voltage process
technology so that the driver works up to 60V.
It is suitable for
high voltage fan motor applications
where 48V operation is required.
[example
of application circuit]
[Design Notes]
Above application example is designed for 48V operation with motor current of 300mA. It uses the following
components:
Hall Elements: HW101A (AKD)
TR1, TR2: 2SC4027A (UTC)
1. Design of R4 and R5
R
4
=
V
CC
- V
BE
- V
CE
I
B
Where; V
CC
is 48V, VCE of UTC
UM2640
is 1.5V, VBE of TR1 is 0.7V. IB is the base current of TR1.
The pull down resistance R5 (connected to TR1) influences turn-off time of TR1.
A typical R5 value is ranging from 1kΩ to 10kΩ. It is highly recommended to determine the value with actual
application for better noise performance.
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