- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375374 > AT5560 (Aimtron Technology Corp.) VCM Driver for Mobile Phone PDF資料下載
參數(shù)資料
| 型號： | AT5560 |
| 廠商： | Aimtron Technology Corp. |
| 英文描述： | VCM Driver for Mobile Phone |
| 中文描述： | 氯乙烯驅(qū)動移動電話 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 341K |
| 代理商： | AT5560 |
AT5560
Preliminary Product Information
VCM Driver for Mobile Phone
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:
http://www.aimtron.com.tw
2006/08/24 REV:0.4 Email:
service@aimtron.com.tw
6
Application Information
z
AT5560 provides constant current which can be evaluated by following equation.
RNF
10
V
×
I
IN
=
.
(1)
It’s obviously that the accuracy value of constant current not only depends on the resistance, RNF,
between IM pin and GND, but also the input voltage, V
IN
. In order to get the suitable and stable input
voltage level, VIN, the PWM signal must be low-pass filtered by R1, R2, and C1. The input voltage should
be calculated by following equation.
R2
V
×
+
where D% means duty ratio of PWM signal, and V
pp
is the amplitude of PWM signal. By setting different
value of duty ratio of PWM signal, the corresponding voltage at IM pin we can get, then the constant
current also be set simultaneously.
-
PP
PWM
IN
V
D%
R2
R1
R2
+
V
R2
R1
×
×
=
=
, (2)
z
As Fig 2 shows, in order to get the suitable and stable input voltage level, V
IN
, the PWM signal must be
low-pass filtered by R1, R2, and C1. The values of R1, R2, and C1 will determine -3dB frequency and DC
value of V
IN
. The -3dB frequency can be got by
(
)
C1
×
R1//R2
1
ω
3dB
=
. (3)
For accuracy and stable value of constant current, the input voltage, V
IN
, should be a DC value. So, it is
suggested that the frequency of PWM signal must be larger than 100 times of -3dB frequency.
PWM
3dB
ω
100
1
ω
=
(4)
z
As above condition, to choose the R1, R2, and C1 is necessary for DC value of input voltage
corresponding PWM signal. The following procedure will explain how to design the R1, R2, and C1.
For PWM signal frequency, f
PWM
=100KHz, the sense resistance, RNF=1.5
Ω
, the desired maximum
output constant current is 70mA when duty ratio of PWM signal is 95%. The Vpp=2.8V, choosing R1, R2,
and C1.
1
f
3dB
×
×
If choosing C1=0.1uF, the (R1//R2)=1.59K
Ω
.
And owing to equation (1) and (2), therefore,
10
V
D%
R2
R1
-
PP
×
+
Thus, R1=4.03K
Ω
, R=2.63 K
Ω
can be get.
(
)
1KHz
f
100
1
C1
R1//R2
2
π
PWM
=
×
=
=
394
.
8
×
%
95
5
×
07
.
V
R2
IN
≈
×
=
=
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT5562 | 2-channel DC Motor Driver For Toy |
| AT5562DPBF | 2-channel DC Motor Driver For Toy |
| AT5562SGRE | 2-channel DC Motor Driver For Toy |
| AT5609 | Bi-directional Motor Driver |
| AT5609S | Bi-directional Motor Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT5562 | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:2-channel DC Motor Driver For Toy |
| AT5562DPBF | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:2-channel DC Motor Driver For Toy |
| AT5562SGRE | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:2-channel DC Motor Driver For Toy |
| AT55HV | 功能描述:整流器/與可變電容器 PTFE Dielectric 600V 1.5 to 55.0pF RoHS:否 制造商:Xicon 電容范圍:2.8 pF to 12.5 pF 容差: 電壓額定值:200 V 工作溫度范圍:- 35 C to + 85 C 端接類型:SMD/SMT 產(chǎn)品:Trimmer Capacitors - Ceramic Dielectric |
| AT5608 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Bi-directional Motor Driver |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。