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HCPL3140 数据表(PDF) 11 Page - Agilent(Hewlett-Packard) |
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HCPL3140 数据表(HTML) 11 Page - Agilent(Hewlett-Packard) |
11 / 16 page 11 + HVDC 3-PHASE AC - HVDC 0.1 µF VCC = 15 V 1 3 + – 2 4 8 6 7 5 HCPL-3140/HCPL-0314 Rg Q1 Q2 270 Ω +5 V CONTROL INPUT 74XXX OPEN COLLECTOR Applications Information Eliminating Negative IGBT Gate Drive To keep the IGBT firmly off, the HCPL-3140/HCPL-0314 has a very low maximum VOL specification of 1.0 V. Minimizing Rg and the lead inductance from the HCPL-3140/HCPL-0314 to the IGBT gate and emitter (possibly by mounting the HCPL-3140/HCPL-0314 on a small PC board directly above the IGBT) can eliminate the need for negative IGBT gate drive in many applications as shown in Figure 19. Care should be taken with such a PC board design to avoid routing the IGBT collector or emitter traces close to the HCPL-3140/HCPL-0314 input as this can result in unwanted coupling of transient signals into the input of HCPL-3140/ HCPL-0314 and degrade performance. (If the IGBT drain must be routed near the HCPL-3140/HCPL-0314 input, then the LED should be reverse biased when in the off state, to prevent the transient signals coupled from the IGBT drain from turning on the HCPL-3140/ HCPL-0314.) Figure 19. Recommended LED Drive and Application Circuit for HCPL-3140/HCPL-0314. |
类似零件编号 - HCPL3140 |
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类似说明 - HCPL3140 |
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