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| 型号： | MAX34440ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 37/43页 |
| 文件大小： | 0K |
| 描述： | IC PS MANAGER PMBUS 6CH 40TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 基站网络线路卡，服务器 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 电流 - 电源： | 2.5mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 托盘 |
| 其它名称： | 90-34440+T00 |
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MAX34440
PMBus 6-Channel Power-Supply Manager
Table 23. MFR_FAULT_RESPONSE Codes
RESPONSE
SETTING
[1:0]
FAULT RESPONSE
11
10
01
00
?
?
?
?
?
?
?
?
?
?
?
?
?
Set the corresponding fault bit in the appropriate status register.
Log fault into MFR_NV_FAULT_LOG if NV_LOG = 1.
Continue power-supply operation.
Set the corresponding fault bit in the appropriate status register.
Log fault into MFR_NV_FAULT_LOG if NV_LOG = 1.
If GLOBAL = 1, assert the FAULT output until faults on all GLOBAL supplies clear and MFR_FAULT_RETRY
expires.
Shut down the power supply by deasserting the PSEN output. Wait for the time configured in
MFR_FAULT_RETRY and restart the supply. If GLOBAL = 1, all enabled power supplies with GLOBAL = 1
are shut down in sequence as configured with TOFF_DELAY, or they are all shut down immediately as con-
figured by bit 0 in ON_OFF_CONFIG. Wait for the time configured in MFR_FAULT_RETRY and restart sup-
plies in sequence as configured with TON_DELAY.
Set the corresponding fault bit in the appropriate status register.
Log fault into MFR_NV_FAULT_LOG if NV_LOG = 1.
If GLOBAL = 1, assert the FAULT output until power supplies are restarted by the user.
Latch-off the power supply by deasserting the PSEN output. If GLOBAL = 1, all enabled power supplies with
GLOBAL = 1 are either shut down in sequence as configured with TOFF_DELAY, or they are all shut down
immediately as configured by bit 0 in ON_OFF_CONFIG.
Set the corresponding fault bit in the appropriate status register.
Continue power-supply operation.
Note: ALERT is asserted if enabled when a new status bit is set. A status bit is latched the first time a particular fault or warning
occurs.
The MFR_FAULT_RESPONSE command specifies the response to each fault condition supported by the device. In
response to a fault, the device always reports the fault in the appropriate status register and asserts the ALERT output
(if enabled in MFR_MODE). A CML fault cannot cause any device action other than setting the status bit and asserting
the ALERT output. The MFR_FAULT_RESPONSE command is described in Table 22.
MFR_FAULT_RETRY (DAh)
The MFR_FAULT_RETRY command sets the delay time between a power supply being shut down by a fault response
and the power supply restarting. This command sets the retry time delay in multiples of 1ms. This command value is
used for all fault responses that require delay retry. If global supplies are being sequenced off, the retry delay time does
not begin until the last global channel is turned off. The 2 data bytes are in DIRECT format. When MFR_FAULT_RETRY
= 0000h, the device restarts the power supply at the next available time period.
MFR_NV_FAULT_LOG (DCh)
Each time the MFR_NV_FAULT_LOG command is executed, the device returns a block of 255 bytes containing one
of the 15 nonvolatile fault logs. The MFR_NV_FAULT_LOG command must be executed 15 times to dump the com-
plete nonvolatile fault log. If the returned fault log is all FFs, this indicates that this fault log has not been written by the
device. As the device is operating, it is reading the latest operating conditions for voltage, current, and temperature,
and it is updating the status registers. All this information is stored in on-board RAM. When a fault is detected (if so
enabled in MFR_FAULT_RESPONSE), the device automatically logs this information to one of the 15 nonvolatile fault
logs. After 15 faults have been written, bit 0 of STATUS_CML is set and the host must clear the fault log by setting the
CLEAR_NV_FAULT_LOG bit in MFR_MODE before any additional faults are logged. All the latest status information is
logged as well as eight readings of voltage from the last 800ms in 100ms increments and four readings of current from
the last 800ms of operation. If a power supply is not enabled to measure either current or voltage or if a temperature
sensor is disabled, the associated fault log position returns 0000h.
Maxim Integrated
37
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