IGD841 datasheet(2/2 Pages) MPD

2 / 2 page

Notes:

• All dimensions are typical in inches (mm)

• Tolerance x.xx =

±0.01 (±0.25)

Function

Smoothing Capacitor

Fault Signal Output

Drive Signal Input (-)

Power Supply (+)

Fault Detect

Drive Signal Input (+)

Drive Output

Gnd

4,7,8,10,11

No Connection

Typical Connection

Connection Notes:

To minimize the potential for problems (and/or

failures) caused by induced noise, EMI interfer-

ence and/or oscillation, the connection of the

gate driver must be done with great care. Some

recommendations would include:

The input signal voltage (pin 14) cannot ex-

ceed 5.25V. The internal dissipation caused

by the resultant increase in input current could

damage the input optocoupler. A current limit-

ing resistor (R1) is used to help prevent this.

The resistor value is calculated by the formula:

150

The gate wiring of the IGBT gate-emitter drive

loop must be shorter than 1 meter.

Twisted pair wiring is recommended for the

gate-emitter drive loop to minimize mutual

induction.

Pins 4, 7, 8, 10 and 11 (not shown in the

connection diagram) of the IGD841 are only

used for testing. They should not be used as

a connection in any application circuit.

If a large voltage spike is generated at the

IGBT collector, the value of the gate resistor

(RG) should be increased.

Smoothing capacitors C2 and C3 should be

mounted as close to the driver as possible.

An internal circuit sets up a -5V off-gate voltage

at pin 9 to protect against faults in the off state.

Do not apply an external voltage to pin 1.

The peak reverse voltage rating of D1 must

be higher than the peak value of the IGBT

collector voltage.

The traces (or wires) between the power

source (VCC) and the driver circuit should be

as short as possible.

Mechanical Dimensions

Pin Connections

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