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MJ10007 Folha de dados(PDF) 4 Page - ON Semiconductor |
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MJ10007 Folha de dados(HTML) 4 Page - ON Semiconductor |
4 / 8 page MJ10007 4 Motorola Bipolar Power Transistor Device Data IC(pk) t t1 tf t IC VCE VCEO(sus) VCEX(sus) AND INDUCTIVE SWITCHING RESISTIVE SWITCHING Lcoil = 10 mH, VCC = 10 V Rcoil = 0.7 Ω Vclamp = VCEO(sus) Lcoil = 180 µH Rcoil = 0.05 Ω VCC = 20 V fo = 500 kHz Vclamp = Rated VCEX Value VCC = 250 V RL = 50 Ω Pulse Width = 50 µs t2 TIME tf CLAMPED VCE or Vclamp tf UNCLAMPED [ t2 20 1 0 PW Varied to Attain IC = 250 mA 2 INDUCTIVE TEST CIRCUIT INDUCTIVE TEST CIRCUIT t1 Adjusted to Obtain IC Test Equipment Scope — Tektronix 475 or Equivalent RESISTIVE TEST CIRCUIT OUTPUT WAVEFORMS 1 INPUT 2 Rcoil Lcoil VCC Vclamp RS = 0.1 Ω 1N4937 OR EQUIVALENT TUT SEE ABOVE FOR DETAILED CONDITIONS 1 INPUT 2 Rcoil Lcoil VCC Vclamp RS = 0.1 Ω 1N4937 OR EQUIVALENT TUT SEE ABOVE FOR DETAILED CONDITIONS 1 2 TUT RL VCC t1 ≈ Lcoil (IC pk ) VCC t2 ≈ Lcoil (IC pk ) VClamp Table 1. Test Conditions for Dynamic Performance Figure 7. Inductive Switching Measurements TIME tsv trv tfi tti 90% Vclamp tc 90% IB1 IB 10% IC 2% IC Vclamp IC Vclamp 10% Vclamp 90% IC SWITCHING TIMES NOTE In resistive switching circuits, rise, fall, and storage times have been defined and apply to both current and voltage waveforms since they are in phase. However, for inductive loads which are common to SWITCHMODE power supplies and hammer drivers, current and voltage waveforms are not in phase. Therefore, separate measurements must be made on each waveform to determine the total switching time. For this reason, the following new terms have been defined. tsv = Voltage Storage Time, 90% IB1 to 10% Vclamp trv = Voltage Rise Time, 10–90% Vclamp tfi = Current Fall Time, 90–10% IC tti = Current Tail, 10–2% IC tc = Crossover Time, 10% Vclamp to 10% IC An enlarged portion of the turn–off waveforms is shown in Figure 7 to aid in the visual identity of these terms. |
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