STK400-020 Sanyo Semiconductor Corporation, STK400-020 Datasheet - Page 8

• Manufacturer Part Number: STK400-020
• Description: 3-channel af Power Amplifier (15W+15W+15W)
• Manufacturer: Sanyo Semiconductor Corporation

The STK400-020 has six power transistors, so the thermal resistance per transistor j-c is 2.1°C / W. With an assured
ambient temperature Ta of 50°C, the required radiator thermal resistance c-a would be as follows:
To satisfy both, 3.19°C/W is the required radiator thermal resistance.
Figure 2 illustrates Pd - P
To satisfy both, 2.83°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 = 26.5 W (1/10 P
From expression (1)'
From expression (2)'
O
O
when the V
max = during 1.5 W)
c-a < (125–50)/23.5
c-a < (150–50)/23.5 – 2.1/6
c-a < (125–50) – 26.5
c-a < (150-50)/26.5 – 2.1/6
< 3.19
< 5.84
< 2.83
< 3.42
CC
of STK400-020 is ±16 V and R
STK400-020
L
is functioning at 3 Ω.
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