TLE7184F datasheet(21/35 Pages) INFINEON

21 / 35 page

Data Sheet

Rev. 1.0, 2008-12-04

TLE7184F

Description of Modes, Protection and Diagnostic Functions

9.1

Description of modes

The operation of TLE7184F can be described by different operation modes

Figure 9

State diagram TLE7184F

Sleep Mode

- low quiescent current

- all supplies switched off

Wake-up Mode

- ramp-up of

int5V, VREG and VDD

Error Mode

- latched error is reported

- MOSFets switched-off

- VREG and VDD on

Normal Mode

without

Error Conditions

- no error is reported

- driver stages are active

Normal Mode

with

OT-Prewarning

- latched error is reported

- driver stages are active

VREG Shut-down

Mode

- latched error is reported

- MOSFets switched-off

- VREG off

Deadlock Mode

*2)

- VREG and VDD off

- latched error is reported

- MOSFets switched-off

- only 5Vint supply is on

/INH = High

“OR”

IFMA= Low

Wake-up time

expired

Reset of

error

/RGS = Low

for t > t

sleep

VDD <= V

DDsleep

VDD_UVSD“OR” (VREG_UVSD “AND” OTPW)

VREG_UVSD (no OTPW)

Reset by /RGS “AND“OTPW

VDD_UVSD “OR” (VREG_UVSD “AND” OTPW)

VREG_UVSD (no OTPW)

OTPW

VDD_UVSD

“OR”

VREG_UVSD

Reset of OTPW error

Error

condition

occures*1)

Error condition

occures*1)

/RGS = Low for t > t

sleep

Error conditions TLE7184F and used abbreviations:

VREG Under Voltage Diagnosis (VREG_UVD)

VDD Under Voltage Diagnosis (VDD_UVD)

Over Current Shut Down (OCSD)

VDH Over Voltage Shut Down (VDH_OVSD)

IOV Over Voltage Shut Down (IOV_OVSD))

Short Circuit Detection (SCD)

SCDL Pin Open Detection (SCDLPOD)

Over Temperature Pre-Warning (OTPW)

Over Temperature Shut Down (OTSD)

VDD Under Voltage Shut Down (VDD_UVSD)

VREG Under Voltage Shut Down (VREG_UVSD)

VS Under Voltage Lockout (VS_UVLO)

*1) Error conditions:

VREG_UVD, VDD_UVD, OCSD, VDH_OVSD,

IOV_OVSD, SCD, SCDLPOD

*2) only way to leave this mode isVS_UVLO

VS Under Voltage Lockout (VS_UVLO) leads from every mode into the Sleep Mode

Over Temperature Shut Down (OTSD) leads from every mode except Dead Lock Mode into the Sleep

Mode

OTPW “OR” VDD_UVSD

Go-to-Sleep Mode

- VDD andVREG are

switched off

- latched error is reported

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