IR2114/IR21141/IR2214/IR22141

10

Functional Block Diagram

SCHMITT

TRIGGER

INPUT

SHOOT

THROUGH

PREVENTION

(DT) Deadtime

LEVEL

SHIFTERS

LATCH

LOCAL DESAT

PROTECTION

SOFT SHUTDOWN

UV_VBS DETECT

di/dt control

Driver

UV_VCC

DETECT

LOCAL DESAT

PROTECTION

SOFTSHUTDOWN

di/dt control

Driver

on/off

on/off

desat

soft

shutdown

on/off

soft

shutdown

on/off (HS)

DesatHS

DesatLS

on/off (LS)

SD

FAULT LOGIC

managemend

(See figure 14)

UV_VCC

VB

HOP

HON

SSDH

DSH

VS

LOP

LON

SSDL

DSL

COM

VSS

FLT_CLR

FAULT/SD

SY_FLT

LIN

HIN

VCC

FAULT

HOLD

SSD

INPUT

HOLD

LOGIC

OUTPUT

SHUTDOWN

LOGIC

State Diagram

Start-Up

Sequence

FAULT

HO/LO=1

HO=LO=0

UnderVoltage

HO=LO=0

Freeze

ShutDown

UV_

VCC

UV_VBS

FAUL

T/SD

DS

H/

L

FAULT/SD

FAULT

/SD

FA

UL

T/

SD

UV_VCC

DESAT

EVENT

UnderVoltage

HO=0, LO=LIN

Soft

ShutDown

Stable State

−

FAULT

−

HO=LO=0 (Normal operation)

−

HO/LO=1 (Normal operation)

−

−

SHUTDOWN (SD)

−

−

FREEZE

Temporary State

−

SOFT SHUTDOWN

−

START UP SEQUENCE

System Variable

−

FLT_CLR

−

HIN/LIN

−

UV_VCC

−

UV_VBS

−

DSH/L

−

SY_FLT

−

FAULT/SD

NOTE1: a change of logic value of the signal labeled on lines (system variable) generates a state transition.