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AVEN — March 21, Contact your Avago Technologies sales representative or authorized distributor for information.

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. There are recommended techniques such as grooves and ribs which may be used on a printed circuit board to achieve desired creepage and clearances. However, this shield does not eliminate the capacitive coupling between the LED and optocoupler pins 5—8 as shown in Figure When negative gate drive is not used VEE in the previous equation is equal to zero volts.

Documents Flashcards Grammar checker. Device considered a two-terminal device: Delaying the LED signal by the maximum propagation delay difference ensures that the minimum dead time is zero, but it does not tell a designer what the maximum dead time will be.

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. Any overlap in Q1 and Q2 conduction will result in large currents flowing through the power devices between datasheet high and low voltage motor rails.


The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices.


These dimensions are needed as a starting point for the equipment designer when hcnw3210 the circuit insulation requirements. However, once mounted on a printed circuit board, minimum creepage and clearance requirements must be met as specified for individual equipment standards. 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.

Lab 9 in this note.

This results in lower peak currents more margin than predicted by this analysis. Pins 1 and 4 need to be connected to LED common.

HCPL-3120/J312, HCNW3120

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

Data subject to change. The LED is optically coupled to an integrated circuit with a power output stage.

All other brand and product names may be trademarks of their respective companies. Contact an Avago Technologies sales hcnw320 or authorized distributor. The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating. The thermal resistance values given in this model can be used to calculate the temperatures at each node for a given operating condition.


Daatasheet of the safety data shall be ensured by means of protective circuits.

HCNW3120 Datasheet

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. Figure 33 is an alternative drive circuit which, like the recommended application circuit Figure 25does achieve ultra high CMR performance by shunting the LED in the off state.

Dead time is hcjw3120 time period during which both hdnw3120 high and low side power transistors Q1 hcnw1320 Q2 in Figure 25 are off.

Techniques to keep the LED in the proper state are discussed in the next two sections. This is achieved by overdriving the LED current beyond the input threshold so that it is not pulled below the threshold during a transient.

In this test, VOH is measured with a dc load current. Creepage and clearance distances will also change depending on factors such as pollution degree and insulation level. Option data sheets are available. Minimum External Tracking L Creepage 7.

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