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 = 8). FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 624 4) 5) 6) 7) Internal thermal shutdown circuit. Gain is adjustable with externally connected resistor. Internal multi-purpose operational amplifier. External mute pin enables the muting of the output current. Optical disc ICs BA5941FP Block diagram Pin descriptions 625 Optical disc ICs Input / output circuits 626 BA5941FP Optical disc ICs BA5941FP FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, BIAS = 2.5V, RL = 8) 627 Optical disc ICs Measurement circuits Driver block Operational amplifier block 628 BA5941FP Optical disc ICs BA5941FP Application example 629 Optical disc ICs FOperation notes (1) The BA5941FP contains a thermal shutdown circuit. When the chip temperature reaches 175_C (Typ.), the output current is muted. (2) By having the mute pin (pin 9) voltage open or lowered 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. FElectrical characteristic curves 630 BA5941FP (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. 0.1F) between 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. Optical disc ICs BA5941FP External dimensions (Units: mm) 631 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