UNISONIC TECHNOLOGIES CO., LTD
UH276
COMPLEMENTARY OUTPUTS
HALL EFFECT LATCH IC
DESCRIPTION
The UTC
UH276
is a Latch-Type Hall Effect sensor with built-in
complementary output drivers. The UTC
UH276
is a Latch-Type Hall
Effect sensor with built-in complementary output drivers. It’s designed
with internal temperature compensation circuit and built-in protection
diode prevent reverse power fault. The application is aimed for
brush-less DC Fan.
The UH276 Outputs operate as the Hysteresis Characteristics.
The Outputs alternately ON and OFF when either the magnetic flux
density larger than threshold B
OP
or the magnetic flux density lower
than B
RP
.
LINEAR INTEGRATED CIRCUIT
1
SIP-4
FEATURES
* Power Supply range from 3V ~ 20V.
* On-chip Hall sensor with hysteresis.
* Open Collector outputs had the sinking capability up to 300mA.
* Output Clamping Diodes reduce the peak output voltages during
switching.
* Build-in reverse protection diode.
*Pb-free plating product number:UH276L
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
UH276-G04-K
UH276L-G04-K
Package
SIP-4
Packing
Bulk
UH276L-G04-K
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) B: Bulk
(2) G04: SIP-4
(3) L: Lead Free Plating, Blank: Pb/Sn
PIN DESCRIPTION
PIN NO. PIN NAME
1
V
CC
2
DO
3
DOB
4
V
SS
P/I/O
P
O
O
P
DESCRIPTION
Positive Power Supply
Output Pin
Output Pin
Ground
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UH276
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
1
V
CC
DO
2
REG.
Hall
Sensor
DOB
3
V
SS
4
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QW-R118-009,A
UH276
ABSOLUTE MAXIMUM RATINGS
(Ta=25℃)
PARAMETER
Supply Voltage
Reverse V
CC
Polarity Voltage
Output OFF Voltage
Magnetic flux density
Output ON Current
Power Dissipation
Junction Temperature
Operating Temperature
Storage Temperature
Note 1: Output Zener protection voltage
Continuous
Hold
Peak (Start Up)
LINEAR INTEGRATED CIRCUIT
SYMBOL
V
CC
V
RCC
V
CE
B
I
C
P
D
T
J
T
OPR
T
STG
RATINGS
20
-25
32
Unlimited
0.3
0.4
0.7
500
+150
-20 ~ +85
-65 ~ +150
UNIT
V
V
V
A
mW
℃
℃
℃
ELECTRICAL CHARACTERISTICS
(Ta =25℃, unless otherwise specified.)
PARAMETER
Low Supply Voltage
Supply Voltage
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Switch Time Differential
SYMBOL
V
CE
V
CC
V
CE(SAT)
I
CEX
I
CC
t
R
t
F
∆t
TEST CONDITIONS
V
CC
=3.5V, I
L
=100mA
V
CC
=14V, I
L
=300mA
V
CE
=14V, V
CC
=14V
V
CC
=20V, Output Open
V
CC
=14V, R
L
=820Ω, C
L
=20pF
V
CC
=14V, R
L
=820Ω, C
L
=20pF
V
CC
=14V, R
L
=820Ω, C
L
=20pF
MIN
3
0.3
<0.1
15
0.3
0.04
0.3
TYP
0.4
MAX
20
0.6
10
25
3
1
3
UNIT
V
V
V
µA
mA
µS
µS
µS
MAGNETIC CHARACTERISTICS
PARAMETR
Operate Point
Release Point
Hysteresis
SYMBOL
B
OP
B
RP
B
HYS
Min.
5
-70
20
Typ.
Max.
70
-5
140
UNIT
G
G
G
HYSTERESIS CHARACTERISTICS
DOB
OFF
Output Voltage in Volts
Output Voltage i n Volts
OFF
DO
ON
Brp
0
Bop
DOB
DO
Brp
0
ON
Bop
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
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QW-R118-009,A
UH276
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
UTC UH276
coil1
coil2
1
+
- Vcc
2 3
4
Brushless DC Fan
TEST CIRCUIT
14V
UTC UH276
DO
R
L1
820Ω
R
L2
820Ω C
L1
20pF
C
L2
20pF
DOB
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QW-R118-009,A
UH276
PERFORMANCE CHARACTERISTICS
Ta(
℃
)
P
D
(mW)
25
550
50
525
60
515
70
505
80
485
85
475
90
465
LINEAR INTEGRATED CIRCUIT
95
455
100
445
105
425
110
405
115
385
120
365
Power Dissipation Curve
600
500
P
D
(mW)
400
300
200
100
0
25
50
75
Ta (℃)
Typical Magnetic Switch Point VS.Supply Voltage
120
Flux Density (G)
80
B
HYS
40
B
OP
0
B
RP
-40
5
12
Supply Voltage (V)
Typical Supply Current versus Supply Voltage
20
Supply Current (mA)
17
14
Ta=25?
Ta=80?
100
125
150
20
24
Ta=-20?
0
0
5
10
Supply Voltage (V)
15
20
25
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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