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TPA701D Datasheet(PDF) 19 Page - Texas Instruments |
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TPA701D Datasheet(HTML) 19 Page - Texas Instruments |
19 / 25 page TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 19 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION headroom and thermal considerations (continued) This is valuable information to consider when attempting to estimate the heat dissipation requirements for the amplifier system. Comparing the absolute worst case, which is 700 mW of continuous power output with 0 dB of headroom, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings for the system. Using the power dissipation curves for a 5-V, 8- Ω system, the internal dissipation in the TPA701 and maximum ambient temperatures is shown in Table 2. Table 2. TPA701 Power Rating, 5-V, 8- Ω, BTL PEAK OUTPUT POWER AVERAGE OUTPUT POWER DISSIPATION D PACKAGE (SOIC) DGN PACKAGE (MSOP) POWER (mW) AVERAGE OUTPUT POWER DISSIPATION (mW) MAXIMUM AMBIENT TEMPERATURE MAXIMUM AMBIENT TEMPERATURE 700 700 mW 675 34 °C 110 °C 700 350 mW (3 dB) 595 47 °C 115 °C 700 176 mW (6 dB) 475 68 °C 122 °C 700 88 mW (9 dB) 350 89 °C 125 °C 700 44 mW (12 dB) 225 111 °C 125 °C Table 2 shows that the TPA701 can be used to its full 700-mW rating without any heat sinking in still air up to 110 °C and 34°C for the DGN package (MSOP) and D package (SOIC) respectively. |
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