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參數(shù)資料
| 型號： | AM5954AM28-E1 |
| 廠商： | BCD SEMICONDUCTOR MANUFACTURING LTD |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | 4-CHANNEL MOTOR DRIVER FOR DVD PLAYER |
| 中文描述： | DISK DRIVE MOTOR CONTROLLER, PDSO28 |
| 封裝： | ROHS COMPLIANT, HSOP-28 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大?。?/td> | 151K |
| 代理商： | AM5954AM28-E1 |
Data Sheet
11
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
4-CHANNEL MOTOR DRIVER FOR DVD PLAYER AM5954A
Application Information
1.
This IC has a built-in thermal shutdown circuit
that mutes the output current when the chip tem-
perature reachs 178
o
C (Typ). The hysteresis is set
to 25
o
C (Typ), so the driver circuits start up again
when the chip temperature falls to 153
o
C (Typ).
The driver buffer is switched off when the supply
voltage falls below 3.5V (Typ), and is switched
back on when the voltage reaches 3.7V (Typ)
again.
In case standby pin voltage is under 0.5V or
opened, quiescent current is muted. Standby pin
voltage should be over 2.0V for normal applica-
tion.
BIAS pin (pin 27) should be pulled up more than
1.2V. In case bias pin voltage is pulled down
under 0.9V (Typ), output current is muted.
Insert the by-pass capacitor (approximately
0.1
μ
F) between V
CC
-pin and GND-pin as near as
possible to this IC.
Heat dissipation fins are attached to the GND
inside the package. Make sure to connect them to
the external GND.
2.
3.
4.
5.
6.
Supplement: (Current-feedback driver)
The transmission gain (output current/input
voltage) is given by:
gm=1/(R
D
+ R
WIRE
) (A/V)
R
WIRE
is the total gold wire resistance inside the
package (0.15
± 0.05
) (Typ).
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