X80000 Datasheet, PDF (28/37 Pages) Intersil Corporation – Smart Power Plug Penta-Power Sequence Controller with Hot Swap

X80000, X80001
FET
turns ON
EN2 In
(from PWRGD)
t_DELAY1
V1GDO
Power Supply
#1 OUTPUT
(3.3V)
EN2
V2GDO
Power Supply
#2 OUTPUT
(2.5V)
EN3
V3GDO
Power Supply
#3 OUTPUT
(1.8V)
EN4
V4GDO
Power Supply
#4 OUTPUT
(1.2V)
RESET
100ms
500ms
1sec
5sec
Programmable
Delay
Power Supply
#1 turns ON
V2MON
threshold
100ms
500ms
1sec
5sec
t_DELAY2
Programmable
Delay
Power Supply
#2 turns ON
V3MON
threshold
Select t_DELAYx and t_RESET
via the 2-wire interface.
100ms
500ms
1sec
5sec
t_DELAY3
Programmable
Delay
Power Supply
#3 turns ON
V4MON
threshold
100ms
500ms
1sec
5sec
t_DELAY4
Programmable
Delay
Power Supply
#4 turns ON
100ms
500ms
1sec
5sec
t_RESET
Programmable
Delay
FIGURE 36. RELAY SEQUENCING OF DC-DC SUPPLIES (TIMING)
Control Registers and Memory
The user addressable internal control, status and memory
components of the X80000 can be split up into four parts:
• Control Register (CR)
• Fault Detection Register (FDR)
• Remote Shutdown Register (RSR)
• EEPROM array
Registers
The Control Registers, Remote Shutdown Register and
Fault Detection Register are summarized in Table 15.
Changing bits in these registers change the operation of the
device or clear fault conditions. Reading bits from these
registers provides information about device configuration or
fault conditions. Reads and writes are done through the
SMBus serial port. It is important to remember that, in most
cases, the SMBus serial port must be isolated between the
X80000, which is referenced to -48V, and the system
controller, which is referenced to ground.
28
FN8148.0
March 18, 2005