Datasheet

15 of 24

V 2.21

www.infineon.com/soi

2020-07-07

2ED2181 (4) S06F (J)

650 V high-side and low-side driver with integrated bootstrap diode

A)

B)

C)

D)

Figure 16

A) Q1 conducting

B) D2 conducting

C) D3 conducting

D) Q4 conducting

The circuit shown in Figure 17-A depicts one leg of the three phase inverter; Figures 17-B and 17-C show a

simplified illustration of the commutation of the current between Q1 and D2. The parasitic inductances in the

the parasitic elements of the circuit. When the high-side power switch turns off, the load current momentarily

these figures). This current flows from the DC- bus (which is connected to the COM pin of the HVIC) to the load

A

B

C

Figure 17

5.10

NTSOA – Negative Transient Safe Operating Area

In a typical motor drive system, dV/dt is typically designed to be in the range of 3 – 5 V / ns. The negative VS

transient voltage can exceed this range during some events such as short circuit and over-current shutdown,

when di/dt is greater than in normal operation.

Infineon’s HVICs have been designed for the robustness required in many of today’s demanding applications. An

indication of the 2ED2181’s robustness can be seen in Figure 18, where the 2ED2181’s Safe Operating Area is

(outside SOA) may lead to IC permanent damage; viceversa unwanted functional anomalies or permanent

damage to the IC do not appear if negative Vs transients fall inside the SOA.