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There are recommended techniques such as grooves and ribs which may be used on a printed circuit board to achieve desired creepage and clearances. In this test, VOH is measured with a dc load current. This is achieved by overdriving the LED current beyond the input threshold so that it is not pulled below the threshold during a transient.


Contact your Avago Technologies sales representative or authorized distributor for information. Delaying the LED signal by the maximum propagation delay difference ensures that the minimum hcna3120 time is zero, but it does not tell a designer what the maximum dead time will be. Pins 1 and 4 need to be connected to LED common.

These dimensions are needed as a starting point for the equipment designer when determining the circuit insulation requirements. Note that the propagation delays used to calculate PDD and dead time are taken at equal temperatures and test conditions since the optocouplers under consideration are typically mounted in close proximity to each other and are switching identical IGBTs.


Documents Flashcards Grammar checker. The Input-Output Momentary Vatasheet Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating.

HCNW3120 Datasheet PDF

Creepage and clearance distances will also change depending on factors such as pollution degree and insulation level. This capacitive coupling causes perturbations in the LED current during common mode transients and becomes the major source of CMR failures for a shielded optocoupler.

The thermal resistance values given in this model can be used datashret calculate the temperatures at each node for a given operating condition.

When negative gate drive is not used VEE datahseet the previous equation is equal to zero volts. The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices.

Option data sheets are available. Any overlap in Q1 and Q2 conduction will result in large currents flowing through the power devices between the high and low voltage motor rails. Maintenance of the safety data shall be ensured by means of protective circuits.

Device considered a two-terminal device: Dead time is the time period during which both the high and low side power hcna3120 Q1 and Q2 in Figure 25 are off. However, once mounted on a printed circuit board, minimum creepage and clearance requirements must be met as specified for individual equipment standards. To order, choose a part number from the part number column and combine with the desired option from the option column to form an order entry.

See Applications section for additional details on limiting IOH peak. This results in lower peak currents more margin than predicted by this analysis.


HCNW Datasheet(PDF) – Agilent(Hewlett-Packard)

Temperature Figure 3 VOH vs. For the continuous voltage rating refer to your equipment level safety specification or Broadcom Ltd.

For creepage, the shortest distance path along the surface of a printed circuit board between the solder fillets of the input and output leads must be considered. Techniques to keep the LED in the proper state are discussed in the next two sections. However, this shield does not eliminate the capacitive coupling between the LED datashest optocoupler pins 5—8 as shown in Figure Figure 33 is an alternative drive circuit which, like the recommended application circuit Figure 25does hcmw3120 ultra high CMR performance by shunting the LED in the off state.

All other brand and product names may be trademarks of their respective companies. Data subject to change. Minimum External Tracking L Creepage 7. The LED hcnw1320 optically coupled to an integrated circuit with a power output stage.

HCNW3120 Datasheet

Lab 9 in this note. Contact an Avago Technologies sales representative or authorized distributor. To minimize dead time in a given design, the turn on of LED2 should be delayed relative to the turn off of LED1 so that under worst-case conditions, transistor Q1 has just turned off when transistor Q2 turns on, as shown in Figure AVEN — March 21,