LA4708 SANYO [Sanyo Semicon Device], LA4708 Datasheet
LA4708
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LA4708 Summary of contents
Page 1
... Ordering number: EN5245A Overview The LA4708 is a BTL two-channel power IC for car audio developed in pursuit of excellent sound quality. Low-region frequency characteristics have been improved through the use of a new NF capacitorless circuit, and crosstalk which causes ‘‘muddy’’ sound has been reduced by improving both circuit and pattern layout ...
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... Output power Output offset voltage V N Output noise voltage Ripple rejection ratio SVRR Channel separation CHsep Input resistance Standby pin applied voltage Arbitrarily large heat sink Ambient temperature, Ta — °C LA4708 Symbol Conditions Range where Pd max is not exceeded ...
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... Pin connection Each Pin Voltage applied through STBY = Pin No. 1 Name Pin voltage (V) 0.29 Pin No. 7 Name IN2 Pin voltage (V) 1.58 Pin No. 13 Name PWR–GND 2 Pin voltage (V) 0 LA4708 - - = IN1 DC Pre-GND 1.58 6. POP – N.C 2.08 0. ...
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... C5 Power supply capacitor C6, C7, C8, C9 Oscillation blocking capacitors R1 Standby switch current limiting resistor LA4708 Copper foil area 90 2.2 µF is recommended. f can be varied by C1, C4 capacitances to adjust the L bass range. Approximately 0.8 second for 33 µF. Since the on time is proportional to this capacitance, it can be set as desired by varying this capacitance. ...
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... How to reduce pop noise . Although the LA4708 reduces pop noise, an electrolytic capacitor of between 0.47 and 2.2 µF can be connected between pin 8 and the pre-GND to further reduce pop noise that occurs when power supply is turned on/off (standby switch on/off). The larger the capacitance, the lower the frequency of pop noise, and it is barely audible, but sound residue of the sound signal is liable to linger when power is turned off ...
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... Pd max Dual channel drive Supply voltage, V — Dual channel drive — W Output power Input frequency, f — Hz LA4708 Dual channel drive Input level, V Dual channel drive Supply voltage, V Dual channel drive Output power dBm kHz O Input frequency, f — Hz — ...
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... The value of power supply capacitor is 0.47 µF (Mylar) — Hz Ripple frequency Dual channel drive Output power, P — LA4708 Input frequency, f — Hz 2200 µF (power supply capacitor) is changed to 0.47 µF (Mylar) Supply voltage, V The value of power supply capacitor is 0.47 µF(Mylar) Calculate as Power supply ripple voltage, V ...
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... V CC Dual channel drive Ambient temperature, Ta — ° C Apply V to standby pin (pin 5) ST through Standby pin applied voltage LA4708 Ambient temperature, Ta — ° C Ambient temperature, Ta — ° C — V Dual channel drive (Apply to pin 5 through — µF No.5245 -8/9 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of September, 1996. Specifications and information herein are subject to change without notice. LA4708 No.5245 -9/9 ...