參數(shù)資料
型號: FAN8705
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 運(yùn)動控制電子
英文描述: 5 Channel DSC Motor Driver
中文描述: DISK DRIVE MOTOR CONTROLLER, 0.8 A, QCC40
封裝: MLP-40
文件頁數(shù): 12/24頁
文件大小: 528K
代理商: FAN8705
12
www.fairchildsemi.com
FAN8705 Rev. 1.0.1
F
Application Information
1. Channel 1 and Channel 2
CH1 and CH2 are constant voltage driver. The output voltage can be calculated by following equations.
when, Gain1 = low,.
when, Gain1 = high
where, V
MOTOR
is motor driving voltage. V
DSON
is drain-source voltage of output lower MOSFET in on time, It’s less than
0.1V@300mA. V
ADJ1
is about 0.75V typically as following equation. It can be adjusted by installing external resister R
ADJ1.
Calcu-
lated V
MOTOR
should be less than power supply voltege VM1 for operating constant voltage mode.
V
MOTOR
V
ADJ1
4.9
V
DSON
×
V
ADJ1
4.9
×
3.6V
=
=
V
MOTOR
V
ADJ1
2
3
--
4.9
×
V
DSON
×
V
ADJ1
2
3
--
4.9
2.4V
=
×
×
=
V
ADJ1
3
4
--
V
ref
×
=
Constant
Voltage
H-bridge
CH1,2
ADJ1
OUT1,3
OUT2,4
VM1
GAIN1
R
2R
Vref
IN1,2
IN3,4
R
4.9X
R
ADJ1
V
ADJ1
L
H
PGND1
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