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STK433-290-E Fiches technique(PDF) 9 Page - Sanyo Semicon Device |
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STK433-290-E Fiches technique(HTML) 9 Page - Sanyo Semicon Device |
9 / 13 page STK433-290-E No. A1630-9/13 [Example] When the IC supply voltage, VCC, is ±33V and RL is 6Ω, the total power dissipation, Pd, within the hybrid IC, will be a maximum of 109.7W at 1kHz for a continuous sine wave signal according to the Pd-PO characteristics. For the music signals normally handled by audio amplifiers, a value of 1/8PO max is generally used for Pd as an estimate of the power dissipation based on the type of continuous signal. (Note that the factor used may differ depending on the safety standard used.) This is: Pd ≈ 85.0W (when 1/8PO max. = 10W, PO max. = 80W). The number of power transistors in audio amplifier block of these hybrid ICs, N, is 6, and the thermal resistance per transistor, θj-c, is 2.1°C/W. Therefore, the required heat sink thermal resistance for a guaranteed ambient temperature, Ta, of 50 °C will be as follows. From formula (1)' θc-a < (125 − 50)/85.0 < 0.88 From formula (2)' θc-a < (150 − 50)/85.0 − 2.1/6 < 0.82 Therefore, the value of 0.82 °C/W, which satisfies both of these formulae, is the required thermal resistance of the heat sink. Note that this thermal design example assumes the use of a constant-voltage power supply, and is therefore not a verified design for any particular user’s end product. STK433-300series Stand-by Control & Mute Control & Load-Short Protection Application (*1) The impression voltage of a Stand-by terminal (#13) is the maximum rating (VST max). Please set up not to exceed. +5V +5V Stand-by Control Mute Control ST-BY PLAY ST-BY MUTE MUTE STK433-300 series 56k Ω 2 3 4 5 8 7 6 9 10 11 12 13 14 15 1 GND +VCC -VCC 56k Ω 6.8k Ω 6.8k Ω Ch2 IN GND Ch1 IN 10k Ω 10k Ω 10k Ω 2.2k Ω Mute Control H: Single Mute L: Normal Stand-by Control(ex) H: Operation Mode(+5V) L: Stand-by Mode(0V) 33 μF /10V 33k Ω 1k Ω 2k Ω 2.7k Ω SUB.GND Ch2 OUT Ch1 OUT GND GND Load Short Protection Circuit 10k Ω 100k Ω 56k Ω 1k Ω 22k Ω Latch Up Circuit 16 17 18 19 GND Ch3 OUT Ch3 IN 10k Ω +VCC Ch2 OUT Ch1 OUT -VCC +PRE Ch1 IN Ch1 NF Ch2 IN Ch2 NF ST- BY Ch3 NF Ch3 IN Ch3 OUT SUB GND Ch2 OUT Ch1 OUT Ch3 OUT -PRE 56k Ω 6.8kΩ 0.1 μF |
Numéro de pièce similaire - STK433-290-E |
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Description similaire - STK433-290-E |
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