參數資料
型號: APX6223QDI-TYL
廠商: Anpec Electronics Corporation
英文描述: DSC Motors Driver IC
中文描述: 數碼相機馬達驅動IC
文件頁數: 11/16頁
文件大?。?/td> 581K
代理商: APX6223QDI-TYL
Copyright
ANPEC Electronics Corp.
Rev. A.2 - Jul., 2005
APX6223
www.anpec.com.tw
11
Function Descriptions (Cont.)
Constant Current H-Bridge (Channel 6) (Cont.)
current about 200mA=0.2V/1
is limited by VC6
voltage. When the setup value of the weak excitation
mode is changed, add a variable resistor between VC6
and VC6A pin to adjust the current limit (V
REFCT
set to
“H”), for example, if VC6 & VC6A pin add a variable
resistor and the value is 20K
, since this 20K
is
parallel with another 20K
, the equal resistor value is
10K
. So VC6 will be equal 1.2V x 10/(100+10) = 0.11V,
the current limit is equal 0.11V/1
= 110mA. AD/A
value direct connects to VC6 (V
REFCT
to “L”) is another
method to control the current limit as well.
Constant
current
H bridge
(CH6)
RNF6
VC6
VREF(1.2V)
VC6A
VREFCT
DGND
Hi: ON
Low: OFF
100K
20K
20K
1
Figure2. Constant Current Control Setting
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