UTC-IC UH378

UNISONIC TECHNOLOGIES CO., LTD
UH378
LINEAR INTEGRATED CIRCUIT
COMPLEMENTARY OUTPUTS
HALL EFFECT LATCH IC
„
DESCRIPTION
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
BOP or the magnetic flux density is lower than BRP.
„
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
Lead Free
Halogen Free
UH378L-G04-K
UH378G-G04-K
„
Package
Packing
SIP-4
Bulk
PIN DESCRIPTION
PIN NO.
1
2
3
4
PIN NAME
VCC
DO
DOB
VSS
P/I/O
P
O
O
P
DESCRIPTION
Positive Power Supply
Output Pin
Output Pin
Ground
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UH378
„
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
1
DO
VCC
2
REG.
Hall
Sensor
DOB
3
VSS
4
„
SENSOR LOCATIONS
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UH378
„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (Ta=25℃)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
20
V
Reverse VCC Polarity Voltage
VRCC
-25
V
Circuit Current
IO
20
mA
Magnetic flux density
B
Unlimited
Power Dissipation
PD
500
mW
Junction Temperature
TJ
+150
℃
Operating Temperature
TOPR
-20 ~ +85
℃
Storage Temperature
TSTG
-65 ~ +150
℃
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 (Ta =25℃, unless otherwise specified)
PARAMETER
SYMBOL
Low-Level Output Voltage
VOL
Output Leakage Current
ICEX
Supply Current
ICC
Output Switching Time
tR
tF
„
TEST CONDITIONS
VCC = 14V, IOUT=5mA
VCC = 3.6V, IOUT=5mA
VCC =14V
VCC =14V
MIN
-
VCC =3.6V
VCC =14V, RL=10KΩ, CL=10pF
VCC =14V, RL=10KΩ, CL=10pF
-
TYP MAX UNIT
0.5 0.7
V
0.4 0.7
1
10
uA
4.7
5
mA
4.6
5
-
5
2
us
MAGNETIC CHARACTERISTICS
A grade
PARAMETR
SYMBOL
BOP
BRP
BHYS
MIN
5
-50
20
TYP
MAX
50
-5
100
UNIT
G
G
G
PARAMETR
SYMBOL
BOP
BRP
BHYS
MIN
5
-70
20
TYP
MAX
70
-5
140
UNIT
G
G
G
PARAMETR
SYMBOL
BOP
BRP
BHYS
MIN
TYP
MAX
100
UNIT
G
G
G
Operate Point
Release Point
Hysteresis
B grade
Operate Point
Release Point
Hysteresis
C grade
Operate Point
Release Point
Hysteresis
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-100
20
200
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„
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
14V
UTC UH378
DO
RL1
10kΩ
RL2
10kΩ CL1
10pF
CL2
10pF
CHYSTERESIS CHARACTERISTICS
Output Voltage in Volts
Output Voltage in Volts
„
DOB
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UH378
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1N45
1N45
10K
10K
UH378
15V
4.7u/400V
680
4.7u/400V
1K 2W
TYPICAL APPLICATION CIRCUIT
220
V
„
LINEAR INTEGRATED CIRCUIT
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LINEAR INTEGRATED CIRCUIT
PERFORMANCE CHARACTERISTICS
Ta(℃)
PD (mW)
25
550
50
525
60
515
70
505
80
485
85
475
90
465
95
455
100
445
105
425
110
405
115
385
120
365
Typical Magnetic Switch Point vs.Supply Voltage
75
BHYS
50
BOP
25
0
BRP
-25
5
12
24
20
Supply Voltage (V)
Ta=-80℃
Ta=25℃
Ta=-20℃
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.
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