ZL8802 Datasheet, PDF (42/91 Pages) Intersil Corporation – Dual Channel/Dual Phase PMBus™ ChargeMode™ Control DC/DC Digital Controller

ZL8802
UT_FAULT_LIMIT (53h)
Definition: The UT_FAULT_LIMIT command sets the temperature, in degrees Celsius, of the unit at which it should indicate an
under-temperature fault.
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Data Length in Bytes: 2
Data Format: Linear-11
Type: R/W
Protectable: Yes
Default Value: E530h (-45°C)
Units: Celsius
Equation: UT_FAULT_LIMIT = Y×2^N
Range: -55°C to +25°C
COMMAND
Format
Bit Position
Access
Function
Default Value
15
R/W
1
14 13 12
R/W R/W R/W
Signed Exponent, N
1
1
0
11
R/W
0
10
R/W
1
UT_FAULT_LIMIT (53h)
Linear-11
9
8
7
6
5
4
R/W R/W R/W R/W R/W R/W
Signed Mantissa, Y
0
1
0
0
1
1
3
R/W
0
2
R/W
0
1
R/W
0
0
R/W
0
UT_FAULT_RESPONSE (54h)
Definition: Configures the under-temperature fault response as defined by the table below. The retry time is the time between restart
attempts.
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Data Length in Bytes: 1
Data Format: Bit Field
Type: R/W
Protectable: Yes
Default Value: BFh (Continuous retries, 280ms retry delay)
Units: Retry time unit = 35ms
COMMAND
Format
Bit Position
Access
Function
Default Value
7
R/W
1
6
R/W
0
5
R/W
1
UT_FAULT_RESPONSE (54h)
Bit Field
4
3
R/W
R/W
See Following Table
1
1
2
R/W
1
1
R/W
1
0
R/W
1
BIT
FIELD NAME
VALUE
DESCRIPTION
Response behavior, the device:
• Pulls SALRT low
7:6 _{• Sets the related fault bit in the status}
registers. Fault bits are only cleared
by the CLEAR_FAULTS command.
00-01
10
11
Not used
Disable and Retry according to the setting in bits [5:3].
Output is disabled while the fault is present. Operation resumes and the output is enabled when
the temperature rises above the UT_WARN_LIMIT.
000 No retry. The output remains disabled until the device is restarted.
001-110 Not used
5:3
Retry Setting
Attempts to restart continuously, until it is commanded OFF (by the ENABLE pin or OPERATION
111
command or both), bias power is removed, or another fault condition causes the unit to shut
down. A retry is attempted after the temperature rises above UT_WARN_LIMIT. The time
between the start of each attempt to restart is set by the value in bits [2:0] multiplied by 35ms.
2:0
Retry Delay
000-111
Retry delay time = (Value +1)*35ms. Sets the time between retries in 35ms increments. Range
is 35ms to 280ms.
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FN8760.1
December 11, 2015