UTC U651 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
1
QW-R118-001,B
SINGLE OUTPUT HALL EFFECT
LATCH
GENERAL DESCRIPTION
The UTC U651 is a Integrated Hall sensor with latch
designed for electronic commutation of brushless DC
motor applications. The device includes an on-chip
Hall voltage generator for magnetic sensing, a
comparator that amplifies the Hall voltage, and a
Schmitt trigger to provide switching hysteresis for
noise rejection, and open-collector output. An internal
bandgap regulator is used to provide temperature
compensated supply voltage for internal circuits and
allows a wide operating supply range.
FEATURES
*3.5V to 20V operation
*On-chip Hall sensor with two different sensitivity and
hysteresis settings.
*Internal bandgap regulator allows temperature
compensated operations and a wide operating
voltage range.
*Open-Collector 25mA Output.
*Reverse Polarity Protection.
TO92S
1
1: Vcc 2: GND 3: OUTPUT
BLOCK DIAGRAM
PIN DESCRIPTIONS
NAME P/I/O PIN
NO.
DESCRIPTION
Vcc
P
1
Positive Power Supply
Vss P 2
Ground
DO O 3
OUTPUT
Pin
1
REG.
Hall
Sensor
3
2
OUTPUT
GROUND
Vcc
UTC U651 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
2
QW-R118-001,B
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C )
CHARACTERISTIC SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
20
V
Reverse Vcc Polarity Voltage
V
RCC
-20
V
Magnetic flux density
B
Unlimited
Output OFF Voltage
Vce
30
V
Output ON Current
Ic
30
mA
Operating Temperature Range
Ta
0 ~ 70
C
Storage Temperature Range
Ts
-65 ~ 150
C
Package Power Dissipation
Pd
400
mW
ELECTRICAL CHARACTERISTICS
( Ta=25
C,Vcc=3.5V to 20V )
CHARACTERISTIC SYMBOL
TEST
CONDITION MIN
TYP.
MAX
UNIT
Operating Supply Voltage
Vcc
8
20
V
Output Saturation Voltage
Vce(sat)
Vcc=14V,Ic=20mA
300
700
mV
Output Leakage Current
Icex
Vce=14V,Vcc=14V
<0.1
10
uA
Supply Current
Icc
Vcc=20V, Output Open
5
10
mA
Output Rise Time
tr
Vcc=14V,RL=820
,CL=20pF
0.3
1.5 us
Output Falling Time
tf
Vcc=14V,RL=820
,CL=20pF
0.3
1.5 us
MAGNETIC CHARACTERISTICS
CHARACTERISTIC SYMBOL
Ta=25
C
Min
Max
Ta=0 ~ 70
C
Min
Max
UNIT
Operate Point
Bop
10
120
5
120
G
Release Point
Brp
-120
-10
-120
-5
G
Hysteresis
Bhys
20
240
10
240
G
CLASSIFICATION OF OPERATING POINT
RANK A
B
Bop
10
70
60
120
Brp
-10
-70
-60
-120
Bhys
20
140
120
240
UTC U651 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
3
QW-R118-001,B
TEST CIRCUIT
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.
14V
RL
RL=820
CL=20pF
CL2
Vout(DO)
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