Example Optocoupler

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• NEC Optocouplers General Overview
  are realized. effect of external light, black resin is used for the external. Fig. 1. Internal Perspective View of PS25xx-1. Fig. 2. Displays an example of Isolation Voltage distribution. (PS2501, PS2502, PS2505 and PS2506). PN2005. 2.3 Dimensions. Figures 3 and 4 show the dimensions of the PS2500. channel...
• Overview of NEC / CEL Optocoupler Products for Motor Control Applications (.pdf)
  devices, and switching speed required for. 2.0. Example IPM modules are the L-series IPM line up. the application. Isolation between stages can be critical. from Powerex. in eliminating ground loops and preventing damage to. expensive components. IPM Module. +VBus. Isolation and output drive features...
• Modeling Phototransistor Optocouplers Using PSPICE Simulation Software
  . Modeling the PS2501-1 optocoupler for. The PSPICE model and Netlist for If = 1 mA, IC = 3mA and. DC and transient analysis. RL = 100W are shown in Figure 2 below and on the next. The following is an example of a modeling of the PS2501. page. optocoupler with load resistance RL, in emitter follower...
• Using NEC Optocouplers as Gate Drivers in IGBT and Power MOSFET Applications
  is used as an example to describe the. IOL (A). characteristics, the internal gate drive circuits, the exter-. PS9552Features. nal gate resistance requirements, and the details of gate. · Large output peak current (IO = 2.5A max). driver optocoupler power dissipation in relation to the. · High-speed...
• Avago Technologies: Reliable LEDs for Automotive Grade Optocouplers (.pdf)
  for insulation and. cations and the improvements in LED design and fabrica-. isolation. Optocouplers have been chosen for this task in. tion. Coupled with package design, this has demonstrated. the current hybrids made. Figure 1 shows an example of. very reliable performance. Based on the mission profiles...
• How to Simulate Current Transfer Ratios (CTR) and Long-Term CTR Degradation in Transistor Optocouplers
  . There are a variety of analog and digital optocouplers. This application note will use NEC's popular PS2501-1 as. available today. The most common is the bipolar photo-. an example. The PS2501-1 is a single channel, optically-. transistor. These devices feature a GaAs LED as a light. coupled isolator that uses...
• Gate Drive Optocouplers for HEV Electric Motor Inverters (.pdf)
  Hybrid electric vehicles (HEVs) save fuel because of their electric motor drive. In an HEV, the propulsion system can be configured several ways, for example in the electric motor assisted mode or in the fully electric motor drive mode. For electric motor drive an inverter system is required...
• Low-Cost, High-Speed I2C Isolation with Digital Isolators
  as in Figure 1, there are several the opto-couplers no longer apply. problems: The isolators must be open-drain. 3. Circuit Using Digital Isolators. There is a latch-up condition that can occur. If, for. The full circuit using a Silicon Laboratories, Inc. Si8442. example, the side A driver pulls low...
• Output Voltage Adjustment In DC/DC Converters
  ´. O. -1. VREF. R1(V. ). R2´ =. REF. Eq.4. V - V. O. REF. R2(RA). Substituting for R2´ in Eq.4 and solving for RA, we get: R2+RA. R1(R2)(V. ). RA =. REF. NOTE: V in Eq.5 is not the nominal output of the converter,. O. Eq.5. but the new higher V . R2(V -V. )-R1(V. ). O. O. REF. REF. EXAMPLE. Given R1...
• Teccor Thyristors used as AC Static Switches and Relays (.pdf)
  . Figure AN1007.3. Waveform Across Static Switch. stage of circuitry for gating is permitted. A typical example would be in the application of this. Figure AN1007.4 illustrates an application using a normally. type circuit for the control of 5 A resistive load with 120. closed circuit driving a sensitive...

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