FAN8413M datasheet(7/16 Pages) FAIRCHILD

Part #	FAN8413M

Description	2 Phase Half Wave BLDC Motor Predriver

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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7 / 16 page

FAN8412M/FAN8413M

7

2. Hall Amplifier Input Block

The hall current (IH) is determined by R1, R2 and R3.

Where, the R2 is the impedance of hall sensor.

An external capacitor, C1, can be used to reduce a power supply noise. In addition, C2 is to remove a noise which is caused in

case the line is long from the hall sensor output to the hall input (pin 2 / 4) of the device.

The input bias voltage of hall amplifier is between 1V and VCC-2V as following figure.

It is recommended that R1 and R3 should have the same value to make the output signal of hall sensor centered as VCC/2.

FAN8412/13M

IN-

IN+

4

2

V

CC

Hall

Sensor

C2

C1

R1

R2

R3

FAN8412M/FAN8413M

IH

VCC

R1 R2 R3

++

------------------------------------

=

V

CC

V

CC-2V

V

CC / 2

1V

GND

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