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STK400-500 Fiches technique(PDF) 8 Page - Sanyo Semicon Device

No de pièce STK400-500
Description  AF Power Amplifier (Split Power Supply) (50 W 50 W 50W min, THD = 0.08%)
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

STK400-500 Fiches technique(HTML) 8 Page - Sanyo Semicon Device

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The STK400-290 has six 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)/66.5
< 1.12
From expression (2)'
θc-a < (150–50)/66.5 – 1.7/6
< 1.22
To satisfy both, 1.12°C/W is the required radiator thermal resistance.
Figure 2 illustrates Pd - PO when the VCC of STK400-290 is ±26 V and RL is functioning at 3 Ω.
Pd = 76 W (1/10 PO max = during 5 W)
From expression (1)'
θc-a < (125–50)/76
< 0.98
From expression (2)'
θc-a < (150-50)/76-1.7/6
< 1.03
To satisfy both, 0.98°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. 4822-8/10
STK400-290


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