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參數資料
| 型號： | AMC5902DS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 6CH Motor Driver for CD-ROM, DVD-ROM |
| 中文描述： | 6路電機驅動器為CD - ROM，DVD - ROM光碟 |
| 文件頁數： | 10/14頁 |
| 文件大小： | 272K |
| 代理商： | AMC5902DS |
AMC D
OC
. #: AMC5902_B
March 2004
AMC5902
Copyright
2003, 2004 ADD Microtech Corp 10 www.addmtek.com
6CH Motor Driver for
CD-ROM, DVD-ROM
APPLICATION INFORMATION (continued)
Table of chip control function
1.Circuit control terminal 1 and 2 (CTL1-pin22 and CTL2-pin23)
The device can be set to standby mode to reduce power dissipation, and spindle-driver braking mode can be switch
on/off by inputting combinations of on/off to these terminals.
CTL1
CTL2
Spindle
Slide
L
L
X
X
H
L
X
X
-
H
O
O
O…ON X…OFF
CTL1
CTL2
SPIN >VREF
L
H
Forward-rotation mode
H
H
Forward-rotation mode
1.1 Reverse-rotation braking mode (spindle)
A reverse-rotation torque is applied when SPIN < VREF.
Reverse-rotation is detected with SPIN input and Hall input.If the spindle detects reverse rotation when
SPIN < VREF, all outputs are shorted out to GND.
1.2 Short-circuit braking mode (spindle)
All the spindle driver outputs are shorted out to GND when SPIN < VREF.
1.3 Standby mode
The IC is brought into standby mode,and its power dissipation can be limited.
1.4 Driving muting
All the output channels except the loading are muted and their outputs are turn off
Focus
X
X
O
Tracking
X
X
O
Loading
X
O
X
SPIN < VREF
Reverse-rotation braking mode
Short-circuit braking mode
2.Muting functions
2.1 Over voltage protection circuit
When the voltage at VCC4 terminal drops to upper than 15.5V(typ.), the output of only the spindle block is
turned off.
2.2 VCC4/VCC6-drop muting
When the voltages at VCC4 terminal and VCC6 terminal drop to lower than 3.8V(typ.), the outputs of all the
channels are turned off.
2.3 VREF-drop muting
When the voltage at VREF terminal drops to a value lower than 0.7V(typ.),the outputs of all the channels are
turned off.Set the VREF terminal voltage to larger than 1.0V.
3 PWM oscillation frequency
The PWM oscillation for driving the spindle and slide is free running.The oscillation frequency is 100kHz(typ.).
4. FOUT function
The FOUT terminal outputs the square pulse signal synchronizing with the Hall inputs (HW+, HW-) timing.
The FOUT terminal is an open-collector output.
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