FD128MX/FD128NX

Technology

Single Phase Smart DC Motor Driver IC

This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.

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Rev0.6 Aug. 01, 2008

P.7

*1

Recirculation Capacitance

CL (2.2uF) capacitor is for PWM drive and kick back absorption, especially when

the diode used.

*2

Thermal Dissipation Handle Diode

To decrease the Output Transistor Voltage drop, then improve the thermal handle

capability.

*3

PWM Oscillator frequency setting capacitor

Setting the CP = 47pF to get the 25KHz PWM frequency.

*4

Lock shutdown time setting capacitor

CO value decides the time of lock function to turn on or turn off drivers.

*5

Rotation Detect pull-up Resistor

For RD open collector structure, low for rotation mode and high for lock mode.

*6

VDD stability capacitor

When the (*1,*2) does not exist, the CM capacitor replace the CL to absorption the

VDD spike and work as the re-circulation capacitor.

*7

Thermistor Resistor

For speed control runs at the PWM mode.

*8

Output overshoot hold RC

VDD(7)

CO(8)

VL(6)

RD(2)

INN(1)

NO(3)

SO(5)

GND(4)

CO =1uF

RRD =10K

CS =1uF

CS =1uF

RS = 50

RS = 50

CM =1uF

CL =2.2uF

DC=12V

*1

*6

*8

*8

*4

*2

*5

Hall IC Input

(FG Signal Output)

FD128MX Application Circuit

RD Output

Opitional

FS177