ACPL-331J-500E Avago Technologies US Inc., ACPL-331J-500E Datasheet - Page 18

• Manufacturer Part Number: ACPL-331J-500E
• Description: Amplifier-Output Optocoupler,2-CHANNEL,3.75kV ISOLATION,SO
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-331J-500E

• Voltage - Isolation: 3750Vrms
• Number Of Channels: 2, Bi-Directional
• Current - Output / Channel: 1.5A
• Propagation Delay High - Low @ If: 180ns @ 10mA
• Current - Dc Forward (if): 12mA
• Input Type: DC
• Output Type: Gate Driver, Miller Clamp
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 33. Recommended application circuit (Single Supply) with desaturation detection and active Miller Clamp
Description of Operation
Normal Operation
During normal operation, V
trolled by input LED current I
the IGBT collector-to-emitter voltage being monitored
through D
Fault Condition
The DESAT pin monitors the IGBT Vce voltage. When the
voltage on the DESAT pin exceeds 6.5 V while the IGBT
is on, VOUT is slowly brought low in order to “softly”
turn-off the IGBT and prevent large di/dt induced
voltages. Also
Figure 34. Fault Timing diagram
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Figure 34. Fault Timing diagramactivated is an internal
feedback channel which brings the FAULT output low for
the purpose of notifying the micro-controller of the fault
condition.
Fault Reset
Once fault is detected, the output will be muted for 5 μs
(minimum). All input LED signals will be ignored during
the mute period to allow the driver to completely soft
shut-down the IGBT. The fault mechanism can be reset by
the next LED turn-on after the 5us (minimum) mute time.
See Figure 34.
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