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FD1257AH 반도체 회로 부품 판매점

Smart motor driver



Feeling Technology 로고
Feeling Technology
FD1257AH 데이터시트, 핀배열, 회로
FEELING
TECHNOLOGY
FD1257AH
Smart motor driver with embedded Hall sensor
Features
Motor driver with high sensitivity Hall-effect sensor
Halogen Free
H-Bridge MOS driver
Lock-shutdown protection & auto-restart function
“Soft-switch” phase-switching technique to reduce vibration and acoustic noise
Thermal shutdown protection(TSD)
Available in SIP-4L package
For 5V and 12V DC motor / FAN systems
General Description
FD1257AH is a single-phase full wave motor driver with embedded Hall-effect sensor IC. It integrates a H-bridge
MOS driver, a high sensitivity hall-effect sensor, an event timer for rotor locked in SIP-4L package, which make the
motors’ PCBs(printed circuit boards) design easy and fabricate the high efficiency DC motors or FANs as simply as
possible.
For safety, Lock-shutdown function would turn the IC’s internal drivers off avoiding over-heat when the rotor is
locked, and IC will try to re-start the rotor’s torque after the time of these drivers’ shutdown.
Thermal-shutdown protection (TSD) ensures the internal drivers of IC are operating under a safe operating
temperature range.
All the protection mechanisms mentioned above combine to provide a complete protecting scenario in the motor
system and avoid any possible damages and guarantee under a correct and safe operation.
Block Diagram
Bias Generator
Hall Plate
Oscillator
Power On
Reset
Chopper Amplifier
Digital Control Logic
(Event Timer)
Figure.1
H-Bridge
MOS 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.
Rev1.2 Aug. 25, 2009
P.1


FD1257AH 데이터시트, 핀배열, 회로
FEELING
TECHNOLOGY
Pin Connection
FD1257AH
Marking Distinguish
1257A
YMV-XX
1 2 34
1257A
YMV-XX
Lot Number
Mass Production Version
Half month(ex:A,B ~X)
Year(ex: 2008 8 )
Figure.2
Figure.3
Pin Descriptions
Name
I/O FD1257AH
Description
VDD
P1
Positive Power Supply
NO O 2
Driver Output 1
SO O 3
Driver Output 2
VSS
G4
Ground
Legend: I=input, O=output, I/O=input/output, P=power supply, G=ground
Functional Descriptions
Refer to the block diagram (Figure.1), FD1257AH 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 logic.
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 Logic
Hall sensor part – generates magnetic pole signals from the Hall-effect sensor.
Driver part – generates switching signals to the H-Bridge MOS driver.
Timer part – generates an interval of time when rotor locked event is occurred.
Rev1.2 Aug. 25, 2009
P.2




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