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FD0252B Datasheet(PDF) 2 Page - Feeling Technology Corp.

No. de pieza FD0252B
Descripción Electrónicos  Smart motor driver with embedded Hall sensor
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Fabricante Electrónico  FEELING [Feeling Technology Corp.]
Página de inicio  http://www.feeling-tech.com.tw/
Logo FEELING - Feeling Technology Corp.

FD0252B Datasheet(HTML) 2 Page - Feeling Technology Corp.

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FD0252b
FD0256b
Rev1.9 Dec. 18, 2008
P.2
FEELING
TECHNOLOGY
PIN CONNECTION
Figure.2
PIN DESCRIPTIONS
Legend: I=input, O=output, I/O=input/output, P=power supply, G=ground
FUNCTIONAL DESCRIPTIONS
Refer to the block diagram (Figure.1), FD0252b/FD0256b is composed of the following building blocks:
Bias Generator
The bias generator provides precise, temperature- and process-insensitive bias references for the analog blocks.
These references guarantee proper operation of the IC under all conditions specified in this specification.
Oscillator
The built-in oscillator provides the clock signal for the digital control logics
Power-on Reset
Used to detect the power-up ramp and reset the digital circuits to achieve correct operation as soon as the power is
ready.
Chopper Amplifier
To achieve a higher magnetic sensitivity the chopper amplifier structure is adopted in this design. Use of this
structure dynamically removes both the offset and flicker noise at the same time.
Digital control logics
Hall sensor part – generates controlling signals for the Hall sensor.
Coil driver part – generates controlling signals for the coil driver.
Signal part –generates an output signal of the rotation detection(RD).
Name
I/O
FD0252b
FD0256b
Description
RD
O
1
1
Rotation detection
VSS
G
2
2
Ground
NO
O
3
3
Driver output
SO
O
4
4
Driver output
VDD
P
5
5
Positive power supply
PWM
I
-
6
Pulse Width Modulation speed control
c
1
2
3
4
5
e
g
c
1
2
3
4
6
d
g
5
FD0252b
FD0256b


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