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MAX34446
PMBus Power-Supply Data Logger
RESET COMPLETE AND ENABLE PIN HIGH
DISABLE WRITES TO MFR_NV_FAULT_LOG
IF FAULT_EN ≠ 0X, ASSERT FAULTn PIN
FORCE PGn PINS LOW ON ALL CHANNELS CONFIGURED TO MONITOR VOLTAGE
(OTHER PGn PINS ARE HIGH IMPEDANCE)
MEASURE THE VOLTAGE/CURRENT/TEMPERATURE
ON VOLTAGE CHANNELS, IS THE MEASURED VOLTAGE > POWER_GOOD_ON?
YES
NO
SET PGn PIN HIGH
AFTER MFR_PG_DELAY
IS THE MEASURED PARAMETER WITHIN FAULT LIMITS?
(ALSO INCLUDES WARNING LIMITS IF FAULT_EN = 11)
YES
DEASSERT THE FAULTn PIN
ENABLE WRITES TO MFR_NV_FAULT_LOG
REGULAR PARAMETER MONITORING BEGINS
Figure 1. PGn and FAULTn Output After a Channel is Enabled
NO
Fault Response When a Channel
is Enabled
Whenever a channel (voltage, current, or temperature)
is enabled (V DD cycle, or hardware or software reset,
or by PMBus command) the channel’s FAULTn signal is
asserted if the FAULT_EN bits in MFR_FAULT_RESPONSE
are set so that the device responds to a fault or warn-
ing. If enabled, the FAULTn pin is not released until all
measurements pass. Also, prior to being allowed to set
Maxim Integrated
a fault/warning status bit or write a nonvolatile fault log
when a fault/warning occurs, the channel must first pass
this particular fault or warning.
Figure 1 describes the steps that the MAX34446 takes
to monitor a channel after the channel is enabled.
Figure 2 explains how the MAX34446 responds after
a channel is enabled and as faults and warnings pass
and fail. Figure 2 shows a voltage channel and over-
voltage faults and warnings, but these same steps
apply to other monitored parameters as well.
16
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MAX3444EASA+ 功能描述:RS-485接口IC 10Mbps Fail-Safe RS-485/J1708 Tcvr RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
MAX3444EASA+T 功能描述:RS-485接口IC 10Mbps Fail-Safe RS-485/J1708 Tcvr RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
MAX3444EASA-T 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
MAX3444EEPA 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube
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