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PDF BU52077GWZ Data sheet ( Hoja de datos )
| Número de pieza | BU52077GWZ | |
| Descripción | Omnipolar Detection Hall IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Omnipolar Detection Hall IC
(Dual Outputs for both S and N Pole Polarity Detection)
BU52077GWZ
General Description
The BU52077GWZ is omnipolar Hall IC incorporating a
polarity determination circuit that enables separate
operation (output) of both the South and North poles.
The polarity judgment is based on the output processing
configuration.
This Hall IC product can be in tablets, smart phones, and
other applications in order to detect open and close of
the cover.
And this Hall IC product can be in digital video cameras
and other applications involving display panels in order
to detect the front/back location or determine the
rotational direction of the panel.
Key Specifications
VDD Voltage Range:
Operate Point:
Hysteresis:
Period:
Supply Current (AVG):
Output Type:
Operating Temperature Range:
1.65V to 3.6V
±15.0mT(Typ)
0.9mT(Typ)
50ms(Typ)
5.0µA (Typ)
CMOS
-40°C to +85°C
Package
UCSP35L1
W(Typ) x D(Typ) x H(Max)
0.80mm x 0.80mm x 0.40mm
Features
Omnipolar Detection (Polarity Detection for both S
and N Poles with Separate, Dual Outputs)
Micro Power Operation (Small Current Using
Intermittent Operation Method)
Ultra-compact CSP4 Package (UCSP35L1)
Polarity Judgment and Separate Output on both
Poles
(OUT1=S-pole Output; OUT2=N-pole Output)
High ESD Resistance 8kV(HBM)
Applications
Tablets, Smart Phones, Notebook Computers,
Digital Video Cameras, Digital Still Cameras, etc.
Typical Application Circuit, Block Diagram, Pin Configurations and Pin Descriptions
HALL
ELEMENT
×
VDD
B1
TIMING
LOGIC
0.1µF
Adjust the bypass capacitor value
as necessary, according to voltage
noise conditions, etc.
B2 OUT1
GND
VDD
A2 OUT2
The CMOS output terminals
enable direct connection to
the PC, with no external
pull-up resistor required.
A1
GND
Pin No.
A1
A2
B1
B2
Pin Name
GND
OUT2
VDD
OUT1
Function
Ground
Output (React to the north pole)
Power supply
Output (React to the south pole)
(TOP VIEW)
A1 A2
(BOTTOM VIEW)
A2 A1
B1 B2
B2 B1
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
1/16
TSZ02201-0M2M0F414010-1-2
11.Aug.2014 Rev.001
1 page  
BU52077GWZ
Typical Performance Curves
20.0
VDD=1.8V
10.0
Bop S
Brp S
20.0
Ta=25°C
10.0
Bop S
Brp S
0.0 0.0
-10.0
Brp N
Bop N
-20.0
-60 -40 -20 0 20 40 60
Ambient Temperature [°C]
80 100
Figure 6. Operate Point, Release Point vs Ambient
Temperature
100
90
VDD=1.8V
80
70
60
50
40
30
20
10
0
-60 -40 -20 0 20 40 60
Ambient Temperature [°C]
80 100
Figure 8. Period vs Ambient Temperature
-10.0
Brp N
Bop N
-20.0
1.4 1.8 2.2 2.6 3.0 3.4 3.8
Supply Voltage ［V］
Figure 7. Operate Point, Release Point vs Supply
Voltage
100
90
80
70
60
50
40
30
20
10
0
1.4
Ta=25°C
1.8 2.2 2.6 3.0 3.4
Supply Voltage [V]
3.8
Figure 9. Period vs Supply Voltage
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
5/16
TSZ02201-0M2M0F414010-1-2
11.Aug.2014 Rev.001
5 Page 
BU52077GWZ
Slide-by Position Sensing
Figure 20 depicts the slide-by configuration employed for position sensing. Note that when the gap (d) between the magnet
and the Hall IC is narrowed, the reverse magnetic field generated by the magnet can cause the IC to malfunction. As seen
in Figure 21, the magnetic field runs in opposite directions at Point A and Point B. Since the dual output omnipolar detection
Hall IC can detect the S-pole at Point A and the N-pole at Point B, the sensor can switch the output ON as the magnet
slides by in the process of position detection. Figure 22 plots magnetic flux density during the magnet slide-by. Although a
reverse magnetic field was generated in the process, the magnetic flux density decreases compared with the center of the
magnet. This demonstrates that slightly widening the gap (d) between the magnet and Hall IC reduces the reverse
magnetic field and prevents malfunctions.
Magnet
Slide
Flux
10.0
5.0
Reverse
L
Figure 20
d
Hall IC
Position of the Hall Element
(Reference)
A
S
N
Figure 21
B
Flux
UCSP35L1
0.0
-5.0
-10.0
0 2 4 6 8 10
Horizontal Distance from the Magnet
[mm]
Figure 22. Magnetic Flux Density vs Horizontal
Distance from the Magnet
0.40
0.40
0.25
(UNIT: mm)
Footprint Dimensions
(Optimize footprint dimensions to the board design and soldering condition)
UCSP35L1
SD
b3
e
Symbol
e
b3
SD
SE
Reference
value
0.40
φ0.20
0.20
0.20
(UNIT：mm)
I/O Equivalence Circuit
OUT1, OUT2
VDD
Figure 23
GND
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
The Hall ICs output pins are configured for CMOS (inverter)
output removing the need for external resistance and allow
direct connection to the host. Removing the need for external
resistors allows for reduction of the current that would
otherwise flow to the external resistor during magnetic field
detection thereby supporting an overall lower current
(micropower) operation.
11/16
TSZ02201-0M2M0F414010-1-2
11.Aug.2014 Rev.001
11 Page | ||
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