SCALE Driver

2SD315AI Data Sheet

Page 12

INTELLIGENT POWER ELECTRONICS

Double or multiple pins

Due to the high output currents, several pins are present in duplicate or as multiples. It

is recommended to connect these in parallel on the layout so that the voltage drop

across the lead frames (contact pins) is minimized.

Special terminal pins

The 2SD315AI half-bridge driver is optimized for universal use and high driver

performance and thus contains more terminal pins than the compact SCALE drivers.

These pins will be described below:

Visox and COMx pins: external support capacitor

Note: The “x“ in Visox and COMx stands for the channel number.

Like the compact SCALE drivers, the 2SD315AI also has blocking capacitors on the

secondary side of the DC/DC converter for each drive channel. IGBTs with gate charges

up to 3C (corresponding typically to about a 1200V/300A module) and gate currents

up to about 10A can be driven without external blocking capacitors. At higher gate

charges or gate currents, external blocking capacitors are required between Visox and

COMx. These capacitors should be rated at between 47 and 120F (but no more than

220 F) and a dielectric strength of 20V. It is important that the capacitors are

suitable for switched-mode power supply applications (low inductance and high current

handling capacity). They must be connected as close as possible to the driver’s terminal

pins with minimum inductance.

The anode of the capacitor is connected to Visox, its cathode to COMx. The COMx pin is

always present in duplicate.

VDC and GND pins: supply for DC/DC Converter

It is recommended to connect a blocking capacitor of approximately 220µF to the driver

input. This capacitor should also be of the switched-mode power supply type.

Pin LSx: Local status

Note: The “x“ in LSx stands for the channel number.

The status of the IGD 001 for each channel is available at this output. It is an open-

collector output to which approximately 5mA may be applied. A LED can be connected

here, for example, as shown in Fig. 6. The LED lights up in normal operation