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TDA1521Q Datenblatt(PDF) 5 Page - NXP Semiconductors |
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TDA1521Q Datenblatt(HTML) 5 Page - NXP Semiconductors |
5 / 14 page July 1994 5 Philips Semiconductors Product specification 2 x 12 W hi-fi audio power amplifier TDA1521 TDA1521Q Fig.2 Power derating curve. THERMAL RESISTANCE HEATSINK DESIGN EXAMPLE With derating of 2,5 K/W, the value of heatsink thermal resistance is calculated as follows: given RL = 8 Ω and VP = ±16 V, the measured maximum dissipation is 14,6 W; then, for a maximum ambient temperature of 65 °C, the required thermal resistance of the heatsink is Note: The internal metal block (heatsink) has the same potential as pin 5 ( −VP). From junction to case Rth j-c = 2,5 K/W R th h a – 150 65 – 14 6 , ---------------------- 25 33 K W ⁄ , = , – = |
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