BA6295AFP-E2 [ROHM]
CD MOTOR DRIVER, PDSO28, HSOP-28;
| 型号： | BA6295AFP-E2 |
| 厂家： | 
ROHM |
| 描述： | CD MOTOR DRIVER, PDSO28, HSOP-28 驱动 CD 光电二极管 |
| 文件： | 总6页 (文件大小：85K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Optical disc ICs
2-channel BTL driver for CD players
BA6295AFP
The BA6295AFP is a 2-channel BTL driver for CD player actuators and motors. This IC delivers a large output current
and is ideal for car CD players.
FApplications
CD players
FFeatures
1) 2-channel BTL driver.
4) Internal thermal shutdown.
2) High output current. (Io = IA Typ.)
3) HSOP 28-pin package allows for miniaturization of
applications.
5) Gain is adjustable by inserting a resistor between
pins 27 and 28 ; pins 18 and 16.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
197
Optical disc ICs
BA6295AFP
FBlock diagram
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 10V, f = 1kHz)
198
Optical disc ICs
BA6295AFP
FElectrical characteristic curves
FMeasurement circuit
199
Optical disc ICs
BA6295AFP
FCircuit operation
The BA6295AFP comprises a 2-channel driver, internal
bias amplifier, mute pin, and thermal shutdown circuit.
(1) Driver
The input resistance of the driver is the focus tracking er-
ror signal from the servo preamplifier and the control sig-
nal from the motor. The input signals normally center on
2.5V, and are converted to a VCC /2-centered signal by
the internal level shift amplifier.
Both positive and negative phases are created during fi-
nal V/I conversion, generating BTL output via the driver
buffer. Because the gain adjustment pins (pins 15, 16, 27
and 28) are external, gain can be adjusted by connecting
a resistor in parallel.
(2) Internal bias amplifier
(3) Mute pins
This IC’s internal bias is 1/2 VCC. Ripple rejection can be
increasedandcrosstalkreducedbyconnectingacapaci-
tor to pin 23.
The output current can be muted by switching one of
these pins to the HIGH level. These pins are also used
for thermal shutdown and should always remain at high
impedance during normal operations. This is because
the thermal shutdown feature is disabled when these
pins are at the LOW level.
FOperation notes
(1) The BA6295AFP has an internal thermal shutdown
circuit. Output current is muted when the chip tempera-
ture exceeds 190_C (typically).
(4) Be sure to connect the IC to a 0.1µF bypass capaci-
tor to the power supply, at the base of the IC.
(5) The radiating fin is connected to the package’s in-
ternal GND (pin 8), but both it and pin 8 should also be
connected to an external ground.
(2) Output current can but muted by raising the voltage
between pins 22 and 8 above 1.5V.
(3) Shorting pins 22 and 8 disables the thermal shut-
down feature.
200
Optical disc ICs
BA6295AFP
FApplication example
FExternal dimensions (Units: mm)
201
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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