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LA4581 Scheda tecnica(PDF) 5 Page - Sanyo Semicon Device |
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LA4581 Scheda tecnica(HTML) 5 Page - Sanyo Semicon Device |
5 / 8 page IC Usage Notes 1. The power amplifier outputs and the common amplifier output are connected through resistors of about 60 Ω. The resistors are for common amplifier oscillation blocking. 2. The preamplifier muting function isolates the preamplifier outputs from SW OUT. The preamplifier is on even when the preamplifier muting is on. 3. If transient noise is noticeable when the power supply is turned off, add the external circuit described below. Transient noise when the power is turned off can be improved by rapidly applying the power amplifier muting. 4. Internal equivalent circuit for each SW pin. . Pre-mute . Power mute . F/R SW Ω Ω However, the standby current IST flows even when the power switch is off IST =(VCC −VBE)/600 kΩ When VCC = 3.0 V IST = (3.0 − 0.6)/600 kΩ 7 4µA Unit (resistance: Ω, capacitance: F) MUTE ON condition : V8IN ^ VCC – 0.2 V Inflow current : I8 7 60 µA (when VCC = 3.0 V) Unit (resistance: Ω) MUTE ON condition : V16 % 0.3 V Outflow current : I16 7 2.5 µA Unit (resistance: Ω, capacitance: F) REV condition : V17 % 0.2 V Unit (resistance: Ω, capacitance: F) LA4581MB No.3535-5/8 |
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