STPM098C datasheet(52/110 Pages) STMICROELECTRONICS

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3.11.3.1

Input power monitor (PIN monitor)

Input power level is monitored by means of dedicated OP diagnosis based on PIN calculation. A hysteresis on

thresholds and filtering time is implemented.

If PIN ≥ PIN_off_th occurs for an interval longer than PIN_latency, the fault is asserted and the PIN_OP flag is set.

Fault pins are asserted LOW according to the FHC configuration and FOR table.

If PIN ≤ PIN_on_th occurs for an interval longer than PIN_latency, the PIN_OP fault is released. PIN_OP clearing

depends on FHC configuration.

The reference thresholds for the IIN monitor unit PIN_off_th and PIN_on_th can be separately configured through

a dedicated PMBus™ register as follows:

PINOFFTH=PINMONtℎlsb×>PINOFFTH10:0

(8)

PINONTH=PINMONtℎlsb×>PINONTH10:0

(9)

Where:

PIN_MON_th_lsb is the minimum voltage step [0.3 W].

PIN_OFF_TH/PIN_ON_TH [10:0] are the dedicated PMBus™ configuration bits [0.3 W ~ 500 W].

The default value is PIN_ON_TH = 0x1F4(150 W) and PIN_OFF_TH = 258 (180 W).

In case PIN_OFF_TH = 0x000 the input current monitor function is disabled, and no OP detection is performed.

Table 43. PIN monitor electrical characteristics

Symbol

Parameter

Test condition

Min Typ Max Unit

Notes

PIN_MON_th_lsb

PIN monitoring threshold step

0.3

Application information

PIN_MON_th_range PIN monitoring threshold range

0.25

500

Application information

3.12

Output metrics telemetry (OMT)

STPM098C implements a full set of telemetry measurements on the converter’s output voltage and currents, and

output stages temperature metrics for each control loops.

Figure 41. Output telemetry simplified block diagram

VSENn

VRTNn

ADC

GND

RLOADn

Nth DrMOS

TOUT

MONITOR

PMBus

TOUT_READ

VOUT

MONITOR

PMBus

VOUT_READ

COUTn

VOUTn

IOUT

REFIN

TOUT/FLT

VREF1/CFILT

ISENn

ADC

TSENn

IOUT

MONITOR

PMBus

IOUT_READ

TSEN UV/OV

VOLTAGE

MONITOR

PHASE OC

MONITOR

STPM098C

Functional description

DS14440 - Rev 1

page 52/110

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