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STK433-120-E bảng dữ liệu(PDF) 9 Page - Sanyo Semicon Device |
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STK433-120-E bảng dữ liệu(HTML) 9 Page - Sanyo Semicon Device |
9 / 11 page STK433-120-E No. A1595-9/11 STK433-100 Series Application Explanation The protection circuit application for the STK433-100sr consists of the following blocks (blocks (1) to (4)). (1) Standby control circuit block (2) Load short-circuit detection block (3) Latch-up circuit block (4) DC voltage protection block 1) Standby control circuit block (Reference example) STK433-100 series test circuit (when +5V is applied to Stand-by control.) Concerning pin 13 reference voltage VST <1> Operation mode The switching transistor in the bias circuit turns on and places the amplifier into the operating mode when the current flowing into pin 13 (IST) becomes 0.25mA or greater. <2> Standby mode When the current flowing into pin 13 (IST) is stopped (=0mA), the switching transistor in the bias circuit turns off, placing the amplifier into the standby mode. (*1) The current limiting resistor (R1) must be used to ensure that the current flowing into the stand-by pin (pin 13) does not exceed its maximum rated value IST 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 standby mode. 2 3 4 5 6 7 8 9 10 11 12 13 14 1 15 OUT Ch1 STK433-100 series 56k Ω IST +VCC Ch1 IN Ch1 NF Ch2 IN Ch2 NF Ch2 OUT(-) Ch1 OUT(+) -VCC SUB GND +PRE ST-BY Ch1 OUT(-) Ch2 OUT(+) -PRE 6.8k Ω 56k Ω 6.8k Ω (2) Load short detection part 22k Ω 56k Ω 1k Ω 0.1 μF10kΩ 100k Ω 1k Ω 33k Ω 2k Ω (*1) R1 13k Ω 33 μF OUT Ch2 82k Ω 82k Ω 100 k Ω 22 μF 22 μF 1) Stand-by control circuit part H: Operation mode (+5V) L: Stand-by mode (0V) Point.B Point.B Point.C Point.C Tr1 Tr2 Stand-by Circuit in Pre Driver IC SW transistor ΔVBE Stand-By Control Voltage VST (*4) R2 I2 I3 (3) Latch-up circuit part (4) DC offset protection Tr4 Tr5 Tr3 Tr5 Tr6 -VCC 2 3 4 5 6 7 8 9 10 11 12 13 14 1 15 STK433-100series +VCC Ch1 IN Ch1 NF Ch2 IN Ch2 NF Ch2 OUT Ch1 OUT -VCC GND +PRE ST-BY Ch1 OUT Ch2 OUT -PRE 1k Ω (*3) 33k Ω 2k Ω (*3) (*1) R1 13k Ω 33 μF (*2) 1) Stand-by control H: Operation mode (+5V) L: Stand-by mode (0V) ΔVBE Stand-By Control Voltage VST Sink current IST SUB ΔVBE ex) Stand-by control voltage=+5V IST=(VST-VBE*2)/R1 =(5-0.6*2)/13k Ω ≈0.3(mA) Stand-by Circuit in Pre Driver IC |
Số phần tương tự - STK433-120-E |
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Mô tả tương tự - STK433-120-E |
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