BU52011HFV-TR Rohm Semiconductor, BU52011HFV-TR Datasheet - Page 17

• Manufacturer Part Number: BU52011HFV-TR
• Description: Industrial Hall Effect / Magnetic Sensors ULTRA SMALL DETECT SENSOR; 1.65-3.3V
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Omnipolar Switchr

Specifications of BU52011HFV-TR

• Operational Type: Bipolar
• Operating Supply Voltage: 1.8 V or 2.5 V
• Current Rating: 5 uA
• Operating Point Min/max: - 5 mT to 5 mT
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Maximum Output Current: 0.5 mA
• Package / Case: HVSOF
• Hall Effect Type: Bipolar
• Output Current: 500µA
• Power Dissipation Pd: 536mW
• Sensor Case Style: HVSOF
• No. Of Pins: 5
• Supply Voltage Range: 1.65V To 3.3V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC
• Sensing Range: ±5mT Trip, ±0.6mT Release
• Voltage - Supply: 1.65 V ~ 3.3 V
• Current - Supply: 8µA
• Current - Output (max): ±0.5mA
• Output Type: Digital, Open Collector
• Features: -
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

●Terminal Equivalent Circuit Diagram
●Operation Notes
1） Absolute maximum ratings
2) GND voltage
3) Thermal design
4) Pin shorts and mounting errors
5) Positioning components in proximity to the Hall IC and magnet
6) Slide-by position sensing
Make sure that the GND terminal potential is maintained at the minimum in any operating state, and is always kept lower
than the potential of all other pins.
Use a thermal design that allows for sufficient margin in light of the power dissipation (Pd) in actual operating conditions.
Use caution when positioning the IC for mounting on printed circuit boards. Mounting errors, such as improper positioning or
orientation, may damage or destroy the device. The IC may also be damaged or destroyed if output pins are shorted
together, or if shorts occur between the output pin and supply pin or GND.
Positioning magnetic components in close proximity to the Hall IC or magnet may alter the magnetic field, and therefore the
magnetic detection operation. Thus, placing magnetic components near the Hall IC and magnet should be avoided in the
design if possible. However, where there is no alternative to employing such a design, be sure to thoroughly test and
evaluate performance with the magnetic component(s) in place to verify normal operation before implementing the design.
Fig.42 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
Fig.43, the magnetic field runs in opposite directions at Point A and Point B. Since the bipolar detection Hall IC can detect
the S-pole at Point A and the N-pole at Point B, it can wind up switching output ON as the magnet slides by in the process of
position detection. Fig. 44 plots magnetic flux density during the magnet slide-by. Although a reverse magnetic field was
generated in the process, the magnetic flux density decreased 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.
Exceeding the absolute maximum ratings for supply voltage, operating conditions, etc. may result in damage to or
destruction of the IC. Because the source (short mode or open mode) cannot be identified if the device is damaged in this
way, it is important to take physical safety measures such as fusing when implementing any special mode that operates in
excess of absolute rating limits.
Fig.42
L
OUT , OUT1, OUT2
Magnet
Fig.41
Slide
Hall IC
d
GND
VDD
Fig.43
Flux
A
S
N
Because they are configured for CMOS (inverter) output, the
output pins require no external resistance and allow direct
connection to the PC. This, in turn, enables reduction of the
current that would otherwise flow to the external resistor
during magnetic field detection, and supports overall low
current (micropower) operation.
17/20
Flux
B
-10
10
-2
-4
-6
-8
8
6
4
2
0
0
1
Horizontal distance from the magnet [mm]
2
3
4
Fig.44
5
6
Reverse
7
8
9
10