ISO5852SEVM 产品设计参考手册 - TI（德州仪器）

An internal desaturation detection recognizes when the IGBT is in an overload condition. Upon a

desaturation detect, a Mute logic immediately blocks the output of the isolator and initiates a soft-turn-off

procedure which disables, OUTH, and pulls OUTL to low over a time span of 2 μs. When OUTL reaches

2 V with respect to the most negative supply potential, V

EE2

, the gate driver output is pulled hard to V

EE2

potential, turning the IGBT immediately off.

When desaturation is active, a fault signal is sent across the isolation barrier pulling the FLT output at the

input side low and blocking the isolator input. Mute logic is activated through the soft-turn-off period. The

FLT output condition is latched and can be reset only after RDY goes high, through a low-active pulse at

the RST input.

monitoring the input and output supplies. If either side have insufficient supply, the RDY output goes low,

otherwise the output is high.

The following warnings and cautions are noted for the safety of anyone using or working close to the

ISO5852S EVM. Observe all safety precautions.

Warning Warning Hot surface. Contact may cause burns. Do not touch.

Danger High The ISO5852S EVM does not have an isolation boundary. If you apply

Voltage high voltage to this board, all terminals should be considered high voltage.

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