Datasheet > BU52092GWZ

BU52092GWZ

更新时间： 2023-09-03 20:25:21

品牌	Logo	应用领域
罗姆 - ROHM		手机智能手机电脑
页数	文件大小	规格书
17页	901K
描述
两极检测霍尔IC用于检测S极或N极的磁场。通过组合本霍尔IC和磁铁，可以实现平板电脑和智能手机的盖开闭检测功能等。

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BU52092GWZ 数据手册

BU52092GWZ

Description of Operations

Micropower Operation (Small Current Consumption Using Intermittent Sensing)

The omnipolar detection Hall IC uses intermittent sensing

I_DD

save energy. At startup the Hall elements, amplifier,

comparator, and other detection circuits power on and

magnetic detection begins. During standby, the detection

circuits power off, thereby reducing current consumption.

The detection results are held while standby is active, and

then output.

Period

Startup Time

Standby Time

Peak

Current

Period: T_p

Startup Time: T_p/4096x4 clk

Peak Current: 8mA

Figure 11. Timing chart of Micropower Operation

(Offset Cancellation)

(Reference data, this is not thing guaranteeing.)

V_DD

The Hall elements form an equivalent Wheatstone (resistor)

bridge circuit. Offset voltage may be generated by a

differential in this bridge resistance, or can arise from

changes in resistance due to package or bonding stress. A

dynamic offset cancellation circuit is employed to cancel this

offset voltage.

When the Hall elements are connected as shown in Figure 12

and a magnetic field is applied perpendicular to the Hall

elements, a voltage is generated at the mid-point terminal of

the bridge. This is known as Hall voltage.

＋

Hall Voltage

Dynamic cancellation switches the wiring (shown in the

figure) to redirect the current flow to a 90° angle from its

original path, and thereby cancels the Hall voltage.

The magnetic signal (only) is maintained in the sample/hold

circuit during the offset cancellation process and then

released.

－

GND

Figure 12. Equivalent circuit of Hall elements

www.rohm.com

TSZ22111 • 15 • 001

TSZ02201-0M2M0F416020-1-2

7/14

8.Aug.2016 Rev.001

1...4 5 678 9 10...17

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