BU52273NUZ Datasheet, PDF (11/20 Pages) Rohm – Omnipolar Detection Hall IC

BU52273NUZ
Intermittent Operation at Power ON
Power ON
VDD
1.65V
Supply Current
(Intermittent Action)
OUT
Startup Time
Standby Time
Standby Time
Indefinite
Interval
High（Not detected Magnetic Field）
Low（Detected Magnetic Field）
Figure 16
The dual output omnipolar detection Hall IC adopts an intermittent operation method in detecting the magnetic field during
startup, as shown in Figure 16. The IC outputs to the appropriate terminal based on the detection result and maintains the
output condition during the standby period. The time from power ON until the end of the initial startup period is an indefinite
interval, but it cannot exceed the maximum period of 100ms. To accommodate the system design, the Hall IC output read
should be programmed within 100ms of power ON, but after the time allowed for the period, ambient temperature, and
supply voltage.
Magnet Selection
Neodymium and ferrite are major permanent magnets. Neodymium generally offers greater magnetic power per volume than
ferrite, thereby enabling miniaturization of magnet. The larger neodymium magnet is, the stronger magnetic flux density is.
And the farther detection distance is, the weaker it is. Therefore the proper size and detection distance of the magnet should
be determined according to the sensitivity of Hall IC. To increase the magnet’s detection distance, the magnet which is
thicker or larger sectional area is used.
Position of the Hall Element
(Reference)
0.55
0.7
0.175
(UNIT: mm)
Figure 17
I/O Equivalence Circuit
OUT1, OUT2
VDD
OUT1
OUT2
GND
Figure 18
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TSZ22111 • 15 • 001
11/16
TSZ02201-0M2M0F415140-1-2
24.May.2016 Rev.002