STCC08

Functional description

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Figure 4.

Failure mode detection for inductive loads in DC control mode

The microcontroller can store the AC switch drive signal in a RAM register when it is driving

the STCC08 input. Therefore it can save gate energy while determining conduction state

from this RAM register and multiplexing this information with AVF signal.

AC LINE: High voltage between AC line and neutral

LOAD CURRENT: Current through the AC load

IN: MCU output driving the STCC08 IN input.

AVF: Alternating voltage feedback, output of the STCC08

SUGGESTED

READING TIME

AVF

NORMAL MODE

LOAD CURRENT

SHORT CIRCUIT

DIODE MODE

NORMAL MODE

SHORT CIRCUIT

DIODE MODE

AC LINE

SUGGESTED

READING TIME

AVF

NORMAL MODE

IN

LOAD CURRENT

SHORT CIRCUIT

DIODE MODE

NORMAL MODE

SHORT CIRCUIT

DIODE MODE

AC LINE