624
Optical disc ICs
4-channel BTL driver for CD players
BA5941FP
The BA5941FP contains a 4-channel BTL driver for CD player motors and actuators. Perfect for compact applications
with the use of the HSOP 28-pin package.
FApplications
CD players, CD-ROM
FFeatures
1) 4-channel BTL driver.
2) Perfect for compact applications with the use of the
HSOP 28-pin power package.
3) Wide dynamic range (4.8V (Typ.) when VCC = 8V and
RL = 8Ω).
4) Internal thermal shutdown circuit.
5) Gain is adjustable with externally connected resistor.
6) Internal multi-purpose operational amplifier.
7) External mute pin enables the muting of the output
current.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
625
Optical disc ICs BA5941FP
Block diagram
Pin descriptions
626
Optical disc ICs BA5941FP
Input/output circuits
627
Optical disc ICs BA5941FP
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, BIAS = 2.5V, RL = 8Ω)
628
Optical disc ICs BA5941FP
Measurement circuits
〈Driver block〉
〈Operational amplifier block〉
629
Optical disc ICs BA5941FP
Application example
630
Optical disc ICs BA5941FP
FOperation notes
(1) The BA5941FP contains a thermal shutdown cir-
cuit.
When the chip temperature reaches 175_C (Typ.), the
output current is muted.
(2) By having the mute pin (pin 9) voltage open or low-
ered to 0.5V or below , the output currents can be muted.
For normal conditions, have the voltage at pin 9 pull-up
to 2V.
(3) If the voltage of the bias pin (pin 2) drops below 1.4V
(Typ.), outputs are muted.
For normal conditions, have the voltage above 1.8V.
(4) If the voltage of the thermal shutdown, mute ON, or
bias pin drops, the mute is activated; however, in these
situations, only the drivers are muted.
Also, the output pin voltage becomes the internal bias
voltage (approx. VCC*VF/2).
(5) Connect a bypass capacitor (approx. 0.1µF) be-
tween the bases of the power supply pins of this IC.
(6) Even though the radiation fins are connected to
ground within the package, be sure to also connect them
to a ground externally as well.
FElectrical characteristic curves
631
Optical disc ICs BA5941FP
External dimensions (Units: mm)
Appendix
Appendix1-Rev1.0
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.
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.
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.
