FAN8705 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FAN8705

5 Channel DSC Motor Driver

Fairchild Semiconductor 

6. Saturated H-Bridge Drive

Saturated H-bridge drive mode can be implemented using the constant current drive block or the constant voltage drive blocks.

6.1 Saturated H-Bridge Drive Using Constant Current Drive Block

Saturated H-bridge drive mode using the constant current dirve block can be operated with ADJ3 connected to VREF input and cur-

rent sensing terminal RS connected to ground.

VREF

ADJ3

IN9,10

Voltage

Reference

VM4

Constant

current

H-bridge

CH5

RS

OUT9

DC

M

OUT10

6.2 Saturated H-Bridge Drive Using Constant Voltage Drive Block

GAIN1/GAIN2 pin is open or connected to ground and ADJ1/ADJ2 input should be connected to VREF when VM1/ VM2 is less than

5V. If VM1/VM2 is more than 5V, ADJ1/ADJ2 input should be connected to power supply input.

VREF

ADJ1/

ADJ2

IN1,2,3,4/

IN5,6

Voltage

Reference

4.9X

GAIN1/

GAIN2

VM1/VM2

Constant

Voltage

H-bridge

CH1,2,3

OUT1,3/

OUT5

DC

M

OUT2,4/

OUT6

19

www.fairchildsemi.com

FAN8705 Rev. 1.0.1

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