AS5047D datasheet(21/40 Pages) AMSCO

Part #	AS5047D

Description	14-Bit On-Axis Magnetic Rotary Position Sensor with 11-Bit Decimal and Binary Incremental Pulse Count

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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21 / 40 page

ams Datasheet

Page 21

[v1-07] 2016-Apr-27

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AS5047D − Detailed Description

UVW Commutation Interface

The AS5047D can emulate the UVW signals generated by the

three discrete Hall switches commonly used in BLDC motors.

The UVWPP field in the SETTINGS register selects the number

of pole pairs of the motor (from 1 to 7 pole pairs). The UVW

signals are generated with 14-bit resolution.

During the start-up time, after power on of the chip, the UVW

signals are low.

Figure 32:

UVW Signals

The Figure 32 shows the UVW signal flow if the magnet rotates

in clockwise direction and counter-clockwise direction (DIR=0).

In this example the sensor to magnet arrangement is done like

shown in Figure 43.

With the bit DIR, it is possible to invert the rotation direction.

180°

240°

300°

360°

120°

60°

0°

angle

Clockwise rotation

Counter-clockwise rotation

180°

240°

300°

360°

120°

60°

0°

AS5047D Datasheet(PDF) 21 Page - ams AG