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STK401-050 Fiches technique(PDF) 7 Page - Sanyo Semicon Device

No de pièce STK401-050
Description  AF Power Amplifier (Split Power Supply) (50 W 50 W min, THD = 0.4%)
Download  9 Pages
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

STK401-050 Fiches technique(HTML) 7 Page - Sanyo Semicon Device

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The STK401-090 has four power transistors, so the thermal resistance per transistor
θj-c is 1.7°C / W. With an assured
ambient temperature Ta of 50°C, the required radiator thermal resistance
θc-a would be:
From expression (1)'
θc-a <(125–50)/43
<1.74
From expression (2)'
θc-a <(150–50)/43–1.7/4
<1.90
To satisfy both, 1.74°C/W is the required radiator thermal resistance.
Figure 2 illustrates Pd - PO when the VCC of STK401-090 is ±26V and RL is functioning at 3Ω.
Pd = 51W (1/10 PO max = during 5W)
From expression (1)'
θc-a <(125–50)/51
<1.47
From expression (2)'
θc-a <(150-50)/51–1.7/4
<1.53
To satisfy both, 1.47°C / W is the required radiator thermal resistance. This design example is based on a fixed voltage
supply, and will require verification within your specific set environment.
No. 4344-7/9
STK401-090


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