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FD0252b 반도체 회로 부품 판매점

Smart motor driver



Feeling Technology 로고
Feeling Technology
FD0252b 데이터시트, 핀배열, 회로
FEELING
TECHNOLOGY
FD0252b
FD0256b
Smart motor driver with embedded Hall sensor
FEATURES
Motor driver with integrated Hall sensor
High current driving capability
Lock-shutdown protection & auto-restart function
Built-in RD(rotation detection) signal output
“Soft-switch” phase-switching technique to reduce vibration and acoustic noise
Thermal shutdown protection
PWM speed control(only available for FD0256b)
Available in both T825(FD0252b) and T826(FD0256b) packages
Halogen
Free
GENERAL DESCRIPTION
FD0252b/FD0256b is a single coil motor driver with embedded Hall sensor. It integrates the motor driver with the
Hall sensor, which simplifies the PCB(printed circuit board) design and make the fabrication of small-size motors
possible.
Lock-shutdown and auto-restart function keeps the motor from being over-heated and restarts the motor after being
locked.
FD0252b/FD0256b is built-in the signal output of rotation detection function, the system could detect the rotation
status from this signal of motor when using FD0252b/FD0256b.
“Soft-switch” phase-switching technique is used to reduce the vibration and acoustic noise.
Thermal-shutdown protection ensures the motor driver to operate under specified temperature ranges.
All the protection mechanisms mentioned above combine to provide a complete protecting scenario for the motor
system, keep the motor system from possible damages and guarantee correct operations.
BLOCK DIAGRAM
Bias Generator
Hall Plate
Chopper amplifier PWM control
Oscillator
Power-On
Reset
Digital control logics
Figure.1
Coil Driver
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Rev1.9 Dec. 18, 2008
P.1


FD0252b 데이터시트, 핀배열, 회로
FEELING
TECHNOLOGY
PIN CONNECTION
FD0252b
FD0256b
5
ce
12
4
g
3
65
cd
12
4
g
3
FD0252b
Figure.2
FD0256b
PIN DESCRIPTIONS
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
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).
Rev1.9 Dec. 18, 2008
P.2




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