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PDF AT5654 Data sheet ( Hoja de datos )
| Número de pieza | AT5654 | |
| Descripción | 4-Channel BTL Motor Driver for CD-ROM | |
| Fabricantes | Aimtron | |
| Logotipo |  |
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AT5654
4-Channel BTL Motor Driver for CD-ROM
Features
˙AT5654 is a 4 channel driver for optical disc
motor driver. Dual channel current feedback
type drivers are built in, in addition to dual
channel motor driver.
˙Separating Vcc into Pre-power of sled motor,
Power of loading motor and Power of actuator,
can make batter power efficiency, by low
supply voltage drive.
˙Stand-by mode built in.
˙Thermal shutdown circuit on chip.
˙Compatible with BA5954
Description
The AT5654 is a 4-channel BTL driver IC for
driving the motors and actuators in products
such as CD-ROM/DVD-ROM/DVD-Player
drives. Two of the channels use current feedback
to minimize the current phase shift caused by the
influence of load inductance.
Applications
CD-ROM drives, DVD drives, DVD-ROM
drives.
Block Diagram
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C.
Tel: 886-3-575-3058
Fax: 886-3-575-3015
1
Email: [email protected]
http://www.aimtron.com.tw
01/12/26
1 page  
AT5654
4-Channel BTL Motor Driver for CD-ROM
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C.
Tel: 886-3-575-3058
Fax: 886-3-575-3015
5
Email: [email protected]
http://www.aimtron.com.tw
01/12/26
5 Page 
AT5654
4-Channel BTL Motor Driver for CD-ROM
Operation notes
(1) Thermal-shut-down circuit built in. In case
IC chip temperature rise to 175 ℃ (typ.),
thermal-shut-down circuit operates and
output current muted. Next time IC chip
temperature falls below 150 ℃ (typ.), the
driver blocks start.
(2) In case stand-by-pin voltage under 0.5V or
opened, quiescent current is muted. stand-by-
pin voltage should be over 2.0V for normal
application.
(3) 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.
(4) Insert the by-pass capacitor between Vcc-pin
and GND-pin of IC as possible as near
(approximatelv 0.1μF).
(5) Heat dissipation fins are attached to the GND
on the inside of the package. Make sure to
connect these to the external GND.
< Supplement >
Current-feedback driver
Trans conductance (output current/input voltage)
is show as follows.
gm
=
Rd
1 (A/V)
+ RWIRE
RWIRE = 0.15Ω (± 0.05Ω) Au wire
Package Outlines (units:mm): HSOP-28
10F-1, No.55, Tung Kuang Road, Hsinchu, Taiwan, R.O.C.
Tel: 886-3-575-3058
Fax: 886-3-575-3015
11
Email: [email protected]
http://www.aimtron.com.tw
01/12/26
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AT5654.PDF ] | |
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