IR21141SS datasheet(16/34 Pages) IRF

16 / 34 page

IR21141/IR22141SSPbF

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Referred to the timing diagram of Fig. 17:

When the input signals are on together the

outputs go off (anti-shoot through),

The HO signal is on and the high side IGBT

desaturates, the HO turn off softly while the

SY_FLT stays low. When SY_FLT goes high

the FAULT/SD goes low. While in SSD, if LIN

goes up, LO does not change (freeze),

When

FAULT/SD

latched

low

(see

FAULT/SD section) FLT_CLR can disable it

and the outputs go back to follow the inputs,

The DSH goes high but this is not read

because HO is off,

The LO signal is on and the low side IGBT

desaturates, the low side behaviour is the

same as described in point B,

The DSL goes high but this is not read as LO

is off,

G. As point A (anti-shoot through).

Referred to the timing diagram Fig. 18:

The device is in the hold state, regardless of

input variations. The hold state results as

SY_FLT is forced low externally,

The device outputs go off by hard shutdown,

externally commanded. A through B is the

same sequence adopted by another IR2x14x

device in SSD procedure.

Externally driven low FAULT/SD (shutdown

state) cannot be disabled by forcing FLT_CLR

(see FAULT/SD section),

The FAULT/SD is released and the outputs go

back to follow the inputs,

Externally driven low FAULT/SD: outputs go

off by hard shutdown (like point B),

As point A and B but for the low side output.

IR21141SS Datasheet(PDF) 16 Page - International Rectifier