bd4912 ROHM Co. Ltd., bd4912 Datasheet
bd4912
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bd4912 Summary of contents
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... BD4912/BD4912-V4 Description The BD4912/BD4912-V4 provides multiple supply voltage outputs for use in car audio and satellite navigation systems with CD player, radio, antenna, lighting, and other components. In addition to overcurrent, overvoltage, and thermal shutdown circuits, it incorporates circuitry for reacting to sudden BATTERY power failures and is ideal for car audio and satellite navigation systems. With its 110 µ ...
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Absolute maximum ratings (Ta = 25°C) Parameter Supply Voltage 1 Supply Voltage 2 SEL1 Supply Voltage SEL2 Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Maximum Junction Temperature Peak Supply Voltage 1 Peak Supply Voltage ...
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Electrical characteristics (Unless otherwise specified 25°C; V Parameter (SEL1 > 3.5 V) Dropout Voltage (P.CON) 3 Peak Output Current (SEL1 > 7.0 V) Dropout Voltage (P.ANT) 4 Peak Output Current (SEL2 > 3.5 V) Output voltage (AM) 5 ...
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Reference data (Unless otherwise specified, V 1000 800 600 From the left, Ta=85 ℃ 400 Ta=25 ℃ Ta=-40 ℃ 200 SUPPLY VOLTAGE:Vcc1,2 [V] Fig.2 Standby Circuit Current 0.8 Ta=85 ℃ 0.6 Ta=25 ℃ 0.4 ...
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From the left, Ta=85 ℃ Ta=25 ℃ Ta=-40 ℃ 100 1000 10000 100000 FREQUENCY:f [Hz] Fig.11 AUDIO Ripple Rejection Ratio (I = 200 mA) O 0.6 Ta=85 ℃ 0.4 Ta=25 ℃ 0.2 Ta=-40 ℃ ...
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From the left, Ta=85℃ Ta=25℃ 20 Ta=-40℃ 100 1000 10000 100000 FREQUENCY:f [Hz] Fig.20 AM Ripple Rejection Ratio ( mA) O 0.10 Ta=85℃ 0.08 Ta=25℃ 0.06 0.04 0.02 Ta=-40℃ 0. ...
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Ta=85 ℃ 6 Ta=25 ℃ Ta=-40 ℃ 0.5 1 1.5 2 2.5 SEL1 VOLTAGE:V [V] SEL1 Fig.29 ILM Input Threshold Voltage Ta=85 ℃ Ta=25 ℃ Ta=-40 ℃ 0.5 ...
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Block diagram GND 1 2 ILM 3 P.ANT 4 P.CON AUDIO 8 SW5V SEL1 12 SEL2 Fig.38 Pin Assignment Diagram Pin descriptions 1 GND This ...
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I/O Equivalent circuit diagrams 3 PIN (P.ANT), 4 PIN (P.CON) Vcc1 0.29 100k 5k TSD ON 200k GND Fig. PIN (ILM, AM, AUDIO, V Vcc GND R 1 [Ω ...
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... Application circuit CPU IGN VDD 0.1μ BD4912 BD4912-V4 0.1μ 0.1μ 0.1μ 0.1μ0.1μ0.1μ 0.47 0.47 μ Fig.45 Application Circuits Example 10/16 B/T MAIN AMP SW5V ILM AUTO ANT μ (Unit R: Ω BATT ...
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Thermal design Refer to the heat reduction characteristics illustrated in Fig. 46 when using the environment where Ta ≥ 25°C. The characteristics of the IC are greatly influenced by the operating temperature. ...
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Operation Notes 1. Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit ...
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Ground Wiring Pattern When using both small signal and large current GND patterns recommended to isolate the two ground patterns, placing a single ground point at the ground potential of application so that the pattern wiring resistance ...
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Use caution when determining the supply voltage range to use. 14. Thermal shutdown circuit (TSD circuit) The IC incorporates a built-in thermal shutdown circuit (TSD circuit). However, in the event that the IC continues to be operated in excess of ...
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Selecting a model name when ordering ROHM model name SIP-M12 <Dimension> 29.8 ± 0.2 4.7 ± 0.2 24.0 ± 0 2.54 0.6 1 ROHM model name ...
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The contents described herein are correct as of October, 2005 The contents described herein are subject to change without notice. For updates of the latest information, please contact and confirm with ROHM CO.,LTD. Any part of this application note must ...
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Appendix 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 ...