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HCNW3120 Datasheet

This is achieved by overdriving the LED current beyond the input threshold so that it is not pulled below the threshold during a transient. Maintenance of the safety data shall be ensured by means of protective circuits. The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices. 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 Figure 33 is an alternative drive circuit which, dqtasheet the recommended application circuit Figure 25does achieve ultra high CMR performance by shunting the LED in the off state.

This results in lower peak currents more margin than predicted by this analysis. However, this shield does not eliminate the capacitive coupling between the LED and optocoupler pins 5—8 as shown in Figure Contact hcnq3120 Avago Technologies sales representative or authorized distributor for information.

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HCPL-3120/J312, HCNW3120

Minimum External Tracking L Creepage 7. Documents Flashcards Grammar checker. The thermal resistance values given in this model can be used to calculate the temperatures at each node for a given operating condition. These dimensions are needed as a starting point for the equipment designer when determining the circuit insulation requirements. Techniques to keep the LED in the proper state are discussed in the next two sections.

Dead time is the time period during which both the high and low side power transistors Q1 and Q2 in Figure 25 are off. Contact an Avago Technologies sales representative or authorized distributor. 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.

Temperature Figure 3 VOH vs.

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. Pins 1 and 4 need to be connected to LED common.

However, once mounted on a printed circuit board, minimum creepage and clearance requirements must be met as specified for individual equipment standards. The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating.

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

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When negative gate drive is not used VEE in the previous equation is equal to zero volts. Device considered a two-terminal device: For the continuous voltage rating refer to your equipment level safety specification or Broadcom Ltd. 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 hcnw31200 are switching identical IGBTs.

HCNW Datasheet(PDF) – AVAGO TECHNOLOGIES LIMITED

In this test, VOH is measured with a dc load current. Option data sheets are available. AVEN — March 21, 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. All other brand and product names may be trademarks of their respective companies.

Lab 9 in this note. Creepage and clearance distances will also change depending on factors such as pollution degree and insulation level. 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.

For creepage, the shortest distance path along the surface of a printed circuit board between the solder fillets of the input and output leads datashee be considered.