MAX14827A Datasheet, PDF (34/42 Pages) Maxim Integrated Products – High Configurability and Integration Reduce SKUs

MAX14827A
Low-Power, Ultra-Small, Dual Driver,
IO-Link Device Transceiver
CURRLIM Register [A2, A1, A0] = [011]
Bit
Bit Name
Read/Write
POR State
Reset Upon Read
Bit 7
CL1
R/W
0
N
Bit 6
CL0
R/W
0
N
Bit 5
CL_Dis
R/W
0
N
Bit 4
CL_BL1
R/W
0
N
Bit 3
CL_BL0
R/W
0
N
Bit 2
TAr1
R/W
0
N
Bit 1
TAr0
R/W
0
N
Bit 0
ArEN
R/W
0
N
The CURRLIM register sets the C/Q and DO driver current limits and the fixed off-time once the drivers have exceeded
their individual thermal shutdown thresholds.
BIT
NAME
DESCRIPTION
Driver Current Limit
7
CL1
Set the CL1 and CL0 bits to select the active current limit for the C/Q and DO drivers
when CL_Dis = 0.
00: Driver current limit is set to 50mA
01: Driver current limit is set to 100mA
6
CL0
10: Driver current limit is set to 200mA
11: Driver current limit is set to 250mA
Driver Current Limit Disable/Enable
5
CL_Dis
1: Disable the driver current limit for the C/Q and DO drivers.
0: Enable the driver current limit (as set by the CL1 and CL0 bits).
Current Limit Blanking Time
4
CL_BL1
Set the CL_BL1 and CL_BL0 bits to select the minimum blanking time to signal a
current limit or thermal fault.
00: Blanking time is 128μs
3
CL_BL0
01: Blanking time is 500μs
10: Blanking time is 1ms
11: Blanking time is 5ms
Auto-Retry Fixed Off-Time
2
TAr1
Set the TAr1 and TAr0 bits to select the fixed driver off-time after a fault has been
generated when auto-retry functionality is enabled (ArEn = 1). The driver is re-enabled
automatically after the fixed off-delay.
00: Fixed off-time is 50ms
1
TAr0
01: Fixed off-time is 100ms
10: Fixed off-time is 200ms
11: Fixed off-time is 500ms
Auto-Retry Fixed Off-Time Enable/Disable
1: Fixed off-time functionality is enabled. C/Q and DO drivers are disabled for a
0
ArEN
fixed time after an overcurrent or thermal fault occurs. The driver is re-enabled
automatically after the fixed off-delay.
0: Fixed off-time functionality is disabled. The driver is re-enabled after temperature
falls below the thermal hysteresis.
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