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BU52078GWZ

TSZ02201-0M2M0F415030-1-2

© 2015 ROHM Co., Ltd. All rights reserved.

24.Aug.2015 Rev.001

www.rohm.com

TSZ22111 • 15 • 001

The OUT2 pin detects and outputs for the N-pole only. Since the OUT2 pin output is unipolar, the output does not respond to

the S-pole. The dual output omnipolar detection Hall IC detects magnetic fields running perpendicular to the top surface of

the package. There is an inverse relationship between magnetic flux density and the distance separating the magnet and the

Hall IC: when distance increases magnetic density falls. When it drops below the operate point (Bop), output goes HIGH.

When the magnet gets closer to the IC and magnetic density rises to the operate point, the output switches LOW. In LOW

output mode, the distance from the magnet to the IC increases again until the magnetic density falls to a point just below Bop,

and output returns HIGH. The point where magnetic flux density restores a HIGH output is known as the release point, Brp.

This detection and adjustment mechanism is designed to prevent noise, oscillation, and other erratic system operation.

Flux

B

Bop N

Brp N

0

High

N-pole

Magnetic Flux Density [mT]

Figure 16. N-pole Detection

Flux

High

High

Low

OUT2[V]

N

N

S

S

S

N

S-pole

OUT2