2sd315ai-33 CT-Concept Technologie AG, 2sd315ai-33 Datasheet - Page 10

• Manufacturer Part Number: 2sd315ai-33
• Description: 2sd315ai-33 Dual Scale Driver Core For Halfbridge Igbts Up To 3300v
• Manufacturer: CT-Concept Technologie AG

SCALE Driver
2SD315AI-33 Data Sheet
Collector sense and dimensioning of Rth
The 2SD315AI-33 dual driver has a collector-sense circuit to protect the power
semiconductors. It is shown in Fig. 4
Its basic operating mode can be obtained from the brochure entitled: “Description and
Application Manual for Scale Drivers”.
To correspond more effectively to the turn-on characteristic of the IGBTs, the SCALE
drivers do not use a static reference voltage to compare the voltage at the collector.
Instead, the reference is used as shown in Fig. 5.
In order to ensure that the 2SD315AI-33 can be applied as universally as possible, the
components Ca (response time capacitor) and Rm (attenuation resistor) are not
integrated in the driver as shown in Fig. 4, but must be connected externally. Whereas
Ca can be matched to the specific application, a standard value of 180Ω is
recommended for Rm. The ground terminal of Ca should be connected to the COMx
pin.
Fig. 4 Collector-sense circuit principle
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OVERCURRENT
MEASURING
SCALE Driver 2SD315A
1,4mA
+VDD
+VDD
150uA
COMx
INTELLIGENT POWER ELECTRONICS
Cx
Rthx
Gx
Ex
Ca
Rm
180R
Dm
(2 x 1N4007)
Rthx
RGx