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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDF8599ATH датащи(PDF) 35 Page - NXP Semiconductors |
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TDF8599ATH датащи(HTML) 35 Page - NXP Semiconductors |
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35 / 54 page  TDF8599A_2 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 02 — 30 June 2009 35 of 54 NXP Semiconductors TDF8599A I2C-bus controlled dual channel class-D power amplifier 14.3 Output current limiting The peak output current is internally limited to 8 A maximum. During normal operation, the output current should not exceed this threshold level otherwise the output signal will be distorted. The peak output current can be estimated using Equation 6: (6) • Io = output current (A) • VP = supply voltage (V) • RL = load impedance (Ω) • RDSon = on-resistance of power switch (Ω) • Rs = series resistance of output inductor (Ω) Example: A 2 Ω speaker can be used with a supply voltage of 19 V before current limiting is triggered. Current limiting (clipping) avoids audio holes but can cause distortion similar to voltage clipping. In Parallel mode, the output current is internally limited above 16 A. THD = 0.5 %. RDSon = 0.1 Ω (at Tj = 100 °C), Rs = 0.025 Ω, tw(min) = 190 ns and IO(ocp) = 16 A (minimum). (1) RL =1 Ω. (2) RL =2 Ω. (3) RL =4 Ω. THD = 10 %. RDSon = 0.1 Ω (at Tj = 100 °C), Rs = 0.025 Ω, tw(min) = 190 ns and IO(ocp) = 16 A (minimum). (1) RL =1 Ω. (2) RL =2 Ω. (3) RL =4 Ω. Fig 28. Po as a function of VP in parallel mode with THD = 0.5 % Fig 29. Po as a function of VP parallel mode with THD = 10 % VP (V) 840 32 24 16 (1) (2) (3) 001aaj183 150 50 100 200 250 Po (W) 0 VP (V) 840 32 24 16 (1) (2) (3) 001aaj184 100 200 300 50 150 250 Po (W) 0 I o V P R L 2 + R DSon R s + () × ------------------------------------------------------ 8 [A] ≤≤ |
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