STPM098C datasheet(67/110 Pages) STMICROELECTRONICS

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Table 53. IOUT overbalancing monitor electrical characteristics

Symbol

Parameter

Test condition

Min Typ

Max Unit

Notes

IOUT_MON_UMB_th_lsb

IOUT UMB monitoring

threshold step

0.94

Application

information

IOUT_MON_UMB_th_range

IOUT UMB monitoring

threshold range

0.94

29.14

Application

information

T_iout_umb_detect_dly

IOUT UMB monitoring

detection delay

CLK_SSM_EN = 0

100

μs

Application

information

Current sum overcurrent diagnosis

A dedicated OC monitoring on the phase current sum of each loop is performed. This diagnosis is based upon the

sum of converted current information of all phases referred to the specific loop.

Σj=1mISENj−CFILTVREF1 ≥IOUTn_oc_sum_thoccursIOUTm_sum_retrytimes,theIOUTn_OC_SUMflagisset.[n

= 1, 2].

The reference thresholds for the IOUTn overcurrent monitor unit IOUTn_oc_sum_th can be separately configured

for loop 1 and 2 through a dedicated PMBus™ register as follows:

IOUTnOCSUMTH=IOUTMONOCSUMtℎlsb×IOUTnOCSUMTH7:0

(25)

Where:

IOUT_MON_OC_SUM_th_lsb is the minimum voltage step [0.94 A].

IOUTn _OC_FAULT_LIMIT[7:0] are the dedicated PMBus™ configuration bits. [0 ~ 239.7A].

Default value is IOUTn_OC_SUM_TH = 0xBF (180 A) for loop 1 and 0x35 (50 A) for loop 2.

In case IOUTn_OC_SUM_TH = 0x00 the related overcurrent monitor function is disabled and no detection is

performed.

The reference retry times for the IOUTn_SUM overcurrent monitor unit IOUTn_oc_sum_retry can be separately

configured for loop 1 and 2 through a dedicated PMBus™ register as follows:

IOUTmOCSUMRETRY=IOUTMONOCSUMretrylsb×IOUTmOCSUMRETRY7:0

(26)

Where:

IOUT_MON_OC_SUM_retry_lsb is the minimum step.

IOUTm_OC_SUM_RETRY [7:0] are the dedicated PMBus™ configuration bits.

The default value is IOUTm_OC_SUM_RETRY = 0x05.

The absolute value of the maximum input voltage slew rate detectable by IOUT monitor is given by

IOUT_adc_lsb/IOUT_adc_latency.

STPM098C

Functional description

DS14440 - Rev 1

page 67/110

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