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參數(shù)資料
| 型號(hào)： | AZ5954M28-E1 |
| 廠商： | BCD Semiconductor Manufacturing Limited |
| 英文描述： | 4-CHANNEL BTL MOTOR DRIVER FOR CD-ROM/DVD |
| 中文描述： | 4通道橋接電動(dòng)機(jī)驅(qū)動(dòng)CD-ROM/DVD |
| 文件頁(yè)數(shù)： | 11/13頁(yè) |
| 文件大?。?/td> | 153K |
| 代理商： | AZ5954M28-E1 |
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11
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 1
4-CHANNEL BTL MOTOR DRIVER FOR CD-ROM/DVD AZ5954
Data Sheet
Application Information
1.
This IC has a built-in thermal shutdown circuit
that mutes the output current when the chip tem-
perature reached 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 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 on
the inside of the package. Make sure to connect
these to 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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