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L4973V51 Datasheet(PDF) 11 Page - STMicroelectronics |
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L4973V51 Datasheet(HTML) 11 Page - STMicroelectronics |
11 / 16 page 01 23 IO(A) 0.5 1.5 2.5 3.5 70 75 85 η (%) 80 90 D97IN662 Vcc=48V Vcc=12V Vcc=24V VO = 3.3V fsw = 200KHz Figure 22: Efficiency vs. Output Current (see fig.1d) 0 10 30 40 Vcc(V) 20 50 0 0.5 1.0 1.5 Pdiss (W) D97IN647A IO=3.5A IO=3A IO=2A IO=2.5A VO = 5.1V fsw = 100KHz Figure 23: Power dissipation vs. Input Voltage (Device only) (see fig.1c) 0 5 15 20 VO(V) 10 25 30 0 0.5 1.0 1.5 Pdiss (W) 2.0 2.5 3.0 D97IN648 IO=3.5A IO=3A IO=1A IO=2A IO=2.5A VCC = 35V fsw = 100KHz Figure 24: Power dissipation vs. Output Voltage (Device only) -40 -20 60 80 Tj( °C) 0 120 20 40 100 4.2 4.4 4.6 4.8 Ilim (A) 5 5.2 D97IN652 Vcc=35 Figure 25: Pulse by Pulse Limiting Current vs. Junction Temperature 1 2 IO (A) 3 2 1 VO (mV) 100 0 -100 D97IN649 T T 200 µs/DIV VCC = 35V fsw = 100KHz Figure 26: Load Transient 2 1 D97IN650 VCC (V) 30 20 10 VO (mV) 100 0 -100 1ms/DIV IO = 1A fsw = 100KHz Figure 27: Line Transient L4973V3 - L4973V5 - L4973D3 - L4973D5 11/16 |
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