STPM098C datasheet(26/110 Pages) STMICROELECTRONICS

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PMBus™ flag signaling

Source diagnosis

Fault output pin signaling

Fault description

PIN_OP = 1

PIN monitor

FAULT = SM_ALERT = VRRDY1 =

VRRDY2 = POWERIN_ALERT = 0

Input Overpower

VOUTn_UV = 1

VOUT monitor

FAULT = SM_ALERT = VRRDY1n = 0

Undervoltage on VSENn [n = 1,

VOUTn_OV = 1

VOUT monitor

FAULT = SM_ALERT = VRRDY1n = 0

Overvoltage on VSENn [n = 1, 2]

IOUTn_OC_FAST = 1

IOUT monitor

FAULT = SM_ALERT = VRRDYm = 0

FAST over-current on ISENn

[n = 1, 2, 3, 4, 5, 6, 7, 8]

[m = 1, 2]

IOUTn_OC_SLOW = 1

IOUT monitor

FAULT = SM_ALERT = VRRDYm = 0

SLOW Overcurrent on ISENn

[n = 1, 2, 3, 4, 5, 6, 7, 8]

[m = 1, 2]

IOUTn_OC_SUM = 1

IOUT monitor

FAULT = SM_ALERT = VRRDY1n = 0

SLOW Overcurrent on VSENn

[n = 1, 2]

TSENn_OT_SD = 1

TSEN monitor

FAULT = SM_ALERT = VRRDYn =

VR_HOT = 0

Overtemperature shutdown on

TSENn

[n = 1, 2]

TSENn_OT_WR = 1

TSEN monitor

VR_HOT = 0

Overtemperature warning on

TSENn

[n = 1, 2]

TSENn_OV = 1

TSEN monitor

FAULT = SM_ALERT = VRRDYn = 0

Overvoltage on TSENn [n = 1, 2]

TSENn_UV = 1

TSEN monitor

FAULT = SM_ALERT = VRRDYn = 0

Undervoltage on TSENn [n = 1,

FBn_NO_CONN = 1

FB disconnection

monitor

FAULT = SM_ALERT = VRRDYn = 0

Feedback disconnection on

VSENn [n = 1, 2]

IOUTn_SHARING_WRM = 1

IOUT monitor

No pin signaling

Phase current overbalancing

[n = 1, 2, 3, 4, 5, 6, 7, 8]

IOUTn_UC_ = 1

IOUT monitor

FAULT = SM_ALERT = VRRDYn = 0

Phase undercurrent (phase fault)

[n = 1, 2, 3, 4, 5, 6, 7, 8]

PMBUS_ERR = 1

PMBus™ monitor

SM_ALERT = 0(1)

PMBus™ comm fault

NVM_CRC_FAIL = 1

NVM data CRC

check

FAULT = SM_ALERT = VRRDY1 =

VRRDY2 = 0

NVM data CRC check

SRR_CRC_FAIL = 1

SRR data CRC

check

FAULT = SM_ALERT = VRRDY1 =

VRRDY2 = 0

SRR data CRC check

MBIST

FAULT = SM_ALERT = VRRDY1 =

VRRDY2 = 0

MBIST failure

ABIST_FAIL = 1

ABIST

FAULT = SM_ALERT = 0(2)

BIST failure

1. Configurable through PMBus™ command STATUS_CML.

2. Configurable through PMBus™ command MFR_FAULT_CONFIG_1 bit 8.

3.4.2

Fault reaction scenarios

Here below, the scenarios of each different fault case are described separately. In case multiple faults take place

at the same time the following priority in reaction is used:

•

Latched fault

•

Ignored fault

STPM098C

Functional description

DS14440 - Rev 1

page 26/110

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