STK400-050 Sanyo Semiconductor Corporation, STK400-050 Datasheet - Page 7

• Manufacturer Part Number: STK400-050
• Description: af Power Amplifier (30W + 30W +30W)
• Manufacturer: Sanyo Semiconductor Corporation

The STK400-050 has six power transistors, so the thermal resistance per transistor j-c is 1.8°C / W. With an assured
ambient temperature Ta of 50°C, the required radiator thermal resistance c-a would be:
To satisfy both, 1.76°C/W is the required radiator thermal resistance.
Figure 2 illustrates Pd - P
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.
From expression (1)'
From expression (2)'
Pd = 51W (1/10 P
From expression (1)'
From expression (2)'
O
max = during 3W)
O
when the V
c-a <(125–50)/42.5
c-a <(150–50)/42.5–1.8/6
c-a <(125–50)-51
c-a <(150-50)/51-1.8/6
<1.76
<2.05
<1.47
<1.66
CC
of STK400-050 is ±19V and R
STK400-050
L
is functioning at 3Ω.
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