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STK433-330N-E Datasheet(PDF) 10 Page - ON Semiconductor |
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STK433-330N-E Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 11 page STK433-330N-E No.A2107-10/11 STK433-300 series Stand-by Control & Mute Control & Load-Short Protection Application [STK433-300N-E series Stand-By Control Example] [Feature] The pop noise which occurs to the time of power supply on/off can be improved substantially by recommendation Stand-By Control Application. Stand-By Control can be done by additionally adjusting the limitation resistance to the voltage such as micom, the set design is easy. (Reference circuit) STK433-300N-E series test circuit To Stand-By Control added +5V. [Operation explanation] #13pin Stand-By Control Voltage VST (1) Operation Mode The switching transistor in the bias circuit turns on and places the amplifier into the operating mode, when 13pin (VST) voltage added above 2.5V (typ 3.0V). (2) Stand-By Mode When 13pin (VST) voltage is stopped (= 0V), the switching transistor in the bias circuit turn off, placing the amplifier into the standby mode. (*1) The current limiting resistor must be used to ensure that stand-by pin (13pin) voltage does not exceed its maximum rated value VST max. (*2) The pop noise level when the power is turned on can be reduced by setting the time constant with a capacitor in operating mode. (*3) Determines the time constant at which the capacitor (*2) is discharged in stand-by mode. (*1) Please use restriction resistance as there is no Stand-by terminal voltage (#13pin) beyond maximun rating (VSTmax). STK433-300N-E series +Vcc Ch1 IN Ch1 NF Ch2 IN Ch2 NF Ch2 OUT Ch1 OUT -Vcc SUB GND +PRE ST-BY Ch1 OUT Ch2 OUT 56kΩ 2 3 4 5 8 7 6 9 10 11 12 13 14 15 1 -PRE GND +Vcc -Vcc 56kΩ 6.8kΩ 6.8kΩ GND Ch1 IN 10kΩ 10kΩ 10kΩ 2.2kΩ Mute Control H:Single Mute L:Normal Stand-by Control(ex) H:Operation Mode(+5V) L:Stand-by Mode(0V) 33μF /10V 33kΩ 1kΩ 2kΩ 2.7kΩ (*1) Ch2 OUT Ch1 OUT Load Short Protection Circuit Ch3 IN Ch3 NF 16 17 18 19 Ch3 OUT Ch3 OUT Ch3 OUT 6.8kΩ 56kΩ 10kΩ GND GND GND Ch2 IN Ch3 IN (*4) R1 is changed depending on the power-supply voltage(-Vcc). Please set resistance(R1) to become [V1=0v] by the following calculation types. Latch Up Circuit 10kΩ 56kΩ 1kΩ 22kΩ 0.1μF R1 (*4) V1 +5V +5V Stand-by Control Mute Control ST-BY PLAY ST-BY MUTE MUTE Stand-by Control H:Operation Mode(+5V) L:Stand-by Mode(0V) 2.7KΩ(*1) IST ∆VBE 1 2 3 4 7 6 5 8 9 10 11 12 STK433-300Nseries 13 14 +Vcc Ch1 IN Ch1 NF Ch2 IN Ch2 NF Ch2 OUT Ch1 OUT -Vcc SUB GND +PRE ST-BY Ch1 OUT Ch2 OUT Bias Circuit in PreDriver IC ∆VBE 15 -PRE #13pin Stand-By OFF threshold. 16 17 18 Ch3 IN Ch3 OUT Ch3 OUT 19 Ch3 NF ex)Stand-By Control Voltage VST=+5v VST is set by the limitation resistance(*1). · IST =(VST-VBE*2)/((*1)+(*2)) =(5v-0.6v*2)/(4.7kΩ+2.7kΩ) =0.513(mA) · VST=IST×4.7kΩ+VBE=0.513×4.7k+0.6=3.0(V) 4.7kΩ(*2) VST 33μF (*2) 33kΩ 1kΩ (*3) 2kΩ (*3) Switching transistor in the bias circuit |
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Similar Description - STK433-330N-E |
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