ISL6398 Datasheet, PDF (46/57 Pages) Intersil Corporation – Programmable soft-start rate and DVID rate

ISL6398
TABLE 15. SMBus, PMBus, AND I²C TELEMETRIES
CODE
79h[15:0]
WORD LENGTH
(BYTE)
TWO
COMMAND NAME
STATUS_WORD
DESCRIPTION
Lower Byte Fault Reporting (= 78h);;
Bit7 = Busy
Bit6 = 0
Bit5 = OverVoltage;
Bit4 = OverCurrent, I_MAX;
Bit3 = 0
Bit2= Over-Temperature, T_MAX;
Bit1 = PMBus Communication Error
Bit0 = 0
Upper Byte Fault Reporting;
Bit7 = V_OUT OV, UV, and OV/UV Warning
Bit6 = I_OUT OC
Bit5 = INPUT OCP >= 1F;
Bit[4:0] = 0
NOTE: 88h-8Eh are two bytes word, while all others are one byte word.
TYPICAL RESOLUTION
Upper Byte: [V_OUT, I_OUT,
IIN_OCP, 0, 0, 0, 0, 0]
Lower Byte: [BUSY, 0, OV,
OC, 0, OT, CML, 0]
TABLE 16. LOCK_VID_OFFSET
D6h
SET_VID
SET_OFFSET
FINAL DAC
TARGETED APPLICATIONS
00h
Not
Not
VBOOT
Not output voltage managed needed
01h
Not
Yes
VBOOT+OFFSET
Small offset for compensation
02h
Not
Yes
VBOOT + OFFSET
Large Offset for Voltage Margining
03h
Yes
Yes
VID + OFFSET
Dynamic VID Operation Needed
NOTE: The ISL6398 is designed to provide secondary output voltage control protection. When D6-0h, it keeps output voltage the same as boot up voltage.
When operating in 01h option, SMBus/PMBus/I²C’s OFFSET should only adjust slightly higher or lower (say ±20mV, but IC does not limit the range) for
PCB loss compensation. To program full range of OFFSET, the user should select 02h or 03h options. 03h option gives users full control of the output
voltage (VID+OFFSET) via SMBus/PMBus/I²C, commonly used in over-clocking applications. Prior to a successful written PMBus VID or OFFSET, the
controller will continue stay at boot up level.
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FN8575.1
August 13, 2015