UNISONIC TECHNOLOGIES CO., LTD
UH378
COMPLEMENTARY OUTPUTS
HALL EFFECT LATCH IC
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC
UH378
is a Latch-Type Hall Effect sensor with built-in
complementary output drivers. It’s composed of internal
temperature compensation circuit and built-in protection diode to
prevent reverse power fault. It is aimed for brush-less DC Fan.
The outputs of the
UH378
operate as the Hysteresis
Characteristics. The Outputs alternately switch between ON and
OFF when either the magnetic flux density is larger than threshold
B
OP
or the magnetic flux density is lower than B
RP
.
FEATURES
* Widen Power Supply range from 3V ~ 20V.
* On-chip Hall sensor with excellent hysteresis.
* Build-in reverse protection diode.
* TTL and MOS IC are directly drivable by the output
* The life is semi permanent because it employs contact-less parts
ORDERING INFORMATION
Ordering Number
UH378G-G04-K
Package
SIP-4
Packing
Bulk
MARKING
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UH378
PIN DESCRIPTION
PIN NO.
1
2
3
4
PIN NAME
V
CC
DO
DOB
V
SS
P/I/O
P
O
O
P
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
Positive Power Supply
Output Pin
Output Pin
Ground
BLOCK DIAGRAM
1
V
CC
DO
2
REG.
Hall
Sensor
DOB
3
V
SS
4
SENSOR LOCATIONS
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QW-R118-012.C
UH378
PARAMETER
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
(T
A
= 25°C, unless otherwise specified)
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
20
V
Reverse V
CC
Polarity Voltage
V
RCC
-25
V
Circuit Current
I
O
20
mA
Magnetic flux density
B
Unlimited
Power Dissipation
P
D
500
mW
Junction Temperature
T
J
+150
°C
Operating Temperature
T
OPR
-20 ~ +85
°C
Storage Temperature
T
STG
-65 ~ +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
(T
A
= 25°C, unless otherwise specified)
PARAMETER
SYMBOL
V
OL
ICEX
I
CC
t
R
t
F
TEST CONDITIONS
V
CC
= 14V, I
OUT
=5mA
V
CC
= 3.6V, I
OUT
=5mA
V
CC
=14V
V
CC
=14V
V
CC
=3.6V
V
CC
=14V, R
L
=10KΩ, C
L
=10pF
V
CC
=14V, R
L
=10KΩ, C
L
=10pF
MIN
TYP MAX UNIT
0.5 0.7
V
0.4 0.7
1
10
μA
4.7
10
mA
4.6
10
5
us
2
Low-Level Output Voltage
Output Leakage Current
Supply Current
Output Switching Time
MAGNETIC CHARACTERISTICS
PARAMETR
SYMBOL
B
OP
B
RP
B
HYS
SYMBOL
B
OP
B
RP
B
HYS
SYMBOL
B
OP
B
RP
B
HYS
MIN
5
-50
20
MIN
5
-70
20
MIN
-100
20
TYP
MAX
50
-5
100
MAX
70
-5
140
MAX
100
200
UNIT
G
G
G
UNIT
G
G
G
UNIT
G
G
G
A grade
Operate Point
Release Point
Hysteresis
B grade
PARAMETR
Operate Point
Release Point
Hysteresis
TYP
C grade
PARAMETR
Operate Point
Release Point
Hysteresis
TYP
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QW-R118-012.C
UH378
TEST CIRCUIT
14V
UTC UH378
LINEAR INTEGRATED CIRCUIT
DO
R
L1
10kΩ
R
L2
10kΩ C
L1
10pF
C
L2
10pF
DOB
CHYSTERESIS CHARACTERISTICS
Output Voltage in Volts
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Output Voltage in Volts
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UH378
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
4.7u/400V
1K 2W
10K
680
4.7u/400V
1N45
220
V
UH378
15V
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10K
1N45
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