STPM098C datasheet(86/110 Pages) STMICROELECTRONICS

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PHASE5ADDTH=ΔLSB×MFRPHASE5ADDCFG7:0

(57)

PHASE5DROPTH=ΔLSB×MFRPHASE5DROPCFG7:0

(58)

PHASE6ADDTH=ΔLSB×MFRPHASE6ADDCFG7:0

(59)

PHASE6DROPTH=ΔLSB×MFRPHASE6DROPCFG7:0

(60)

PHASE7ADDTH=ΔLSB×MFRPHASE7ADDCFG7:0

(61)

PHASE7DROPTH=ΔLSB×MFRPHASE7DROPCFG7:0

(62)

PHASE8ADDTH=ΔLSB×MFRPHASE8ADDCFG7:0

(63)

PHASE8DROPTH=ΔLSB×MFRPHASE8DROPCFG7:0

(64)

Where:

ΔLSB is the minimum slew rate step [0.94 A].

MFR_PHASEn_ADD_CFG [7:0], MFR_PHASEn_DROP_CFG [7:0] are the dedicated PMBus™ configuration bits

[0 A ~ 239.7A].

Default values are:

PHASE2_ADD_TH = 14 A

PHASE2_DROP_TH = 10 A

PHASE3_ADD_TH = 25 A

PHASE3_DROP_TH = 21 A

PHASE4_ADD_TH = 33 A

PHASE4_DROP_TH = 29 A

PHASE5_ADD_TH = 46 A

PHASE5_DROP_TH = 42 A

PHASE6_ADD_TH = 60 A

PHASE6_DROP_TH = 56 A

PHASE7_ADD_TH = 72 A

PHASE7_DROP_TH = 68 A

PHASE8_ADD_TH = 85 A

PHASE8_DROP_TH = 81 A

In case PHASEn_ADD_TH = 0x00 the dynamic phase shedding function is disabled, and no phase adds drop

whit respect to phase assignment configuration is performed.

DPS DROP_DELAY value can be programmed through a dedicated PMBus™ register as follows:

Table 67. DPS drop delay configuration bit

PH_SHED_DELAY1

Description

DROP DELAY = 8 PWM periods (default)

DROP DELAY = 16 PWM periods

DROP DELAY = 24 PWM periods

DROP DELAY = 32 PWM periods

STPM098C

Functional description

DS14440 - Rev 1

page 86/110

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