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| 型号： | MAX34441ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/53页 |
| 文件大小： | 0K |
| 描述： | IC PS MANAGER PMBUS 5CH 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： | 90-34441+T00 |
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PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
The following example demonstrates how the host can
send and retrieve values from the device. Table 4 shows
the coefficients used in the following parameters.
Table_4._Coefficients_for_DIRECT_Format_
The host sends the SMBus ARA (0001 100). The device
ACKs the SMBus ARA, transmits its slave address, and
deasserts ALERT . The system controller then communi-
cates with PMBus commands to retrieve the fault/warn-
ing status information from the device.
Value
COMMAND_
CODE
25h
8Bh
COMMAND_NAME
VOUT_MARGIN_HIGH
READ_VOUT
m
1
1
b
0
0
R
0
0
See the individual command sections for more details.
Faults and warnings that are latched in the status regis-
ters are cleared when any one of the following conditions
occurs:
? A CLEAR_FAULTS command is received.
? The RST pin is toggled.
If a host wants to set the device to change the power-
supply output voltage to 3.465V (or 3465mV), the cor-
responding VOUT_MARGIN_HIGH value is:
Y = (1 x 3465 + 0) x 10 0 = 3465 (decimal) = 0D89h (hex)
Conversely, if the host received a value of 0D89h on a
READ_VOUT command, this is equivalent to:
X = (1/1) x (0D89h x 10 -(-0) - 0) = 3465mV = 3.465V
Power supplies and power converters generally have
no way of knowing how their outputs are connected to
ground. Within the power supply, all output voltages are
most commonly treated as positive. Accordingly, all out-
put voltages and output voltage-related parameters of
PMBus devices are commanded and reported as posi-
tive values. It is up to the system to know that a particular
output is negative if that is of interest to the system. All
output-voltage-related commands use 2 data bytes.
Fault Management and Reporting
For reporting faults/warnings to the host on a real-time
basis, the device asserts the open-drain ALERT pin (if
enabled in MFR_MODE) and sets the appropriate bit in
the various status registers. On recognition of the ALERT
assertion, the host or system manager is expected to poll
the I 2 C bus to determine the device asserting ALERT .
Table_5._Device_Parametric_Monitoring_States
? Bias power to the device is removed and then reapplied.
One or more latched-off power supplies is only restarted
when one of the following occurs:
? The output is commanded through the CONTROL
pin, the OPERATION command, to turn off and then
turn back on.
? The RST pin is toggled.
? Bias power to the device is removed and then reapplied.
A power supply is not allowed to turn on if any faults the
supply responds to are detected. Only after the faults
clear is the power supply allowed to turn on. When global
supplies are being sequenced on, a fault on any of the
supplies keeps all supplies from being turned on.
A system-wide power-up (OPERATION command is
received to turn the supplies on when PAGE is 255 or the
CONTROL pin is toggled to turn on the supplies) allows
all enabled power supplies to power-up. If any faults are
detected once the supplies start to turn on, the response
of MFR_FAULT_RESPONSE is performed.
The device responds to fault conditions accord-
ing to the manufacturer fault response command
(MFR_FAULT_RESPONSE). This command byte
determines how the device should respond to each
PARAMETER
Overvoltage
REQUIRED_CONDITIONS_FOR_ACTIVE_MONITORING
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
?
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
ACTION_DURING_A_FAULT
Continue monitoring
Undervoltage
?
?
PSEN output is active
Channel’s VOUT must have exceeded VOUT_UV_FAULT during
Stop monitoring while the
power supply is off
channel power-up
Overcurrent
?
?
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
Current monitoring enabled (IOUT_OC_FAULT_LIMIT ≠ 0000h)
Continue monitoring
Power-Up Time
Overtemperature
Fan Speed
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
Temp sensor enabled (ENABLE in MFR_TEMP_SENSOR_CONFIG = 1)
Fan enabled (bit 7 in FAN_CONFIG_1_2 = 1)
Monitor only during power-on
Continue monitoring
Continue monitoring
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX34441ETL+ | 功能描述:监控电路 PMBus 6Ch Power Supply Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX34441ETL+T | 功能描述:监控电路 PMBus 6Ch Power Supply Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX34441EVKIT# | 功能描述:电源管理IC开发工具 MAX34441 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX34446ETL+ | 功能描述:监控电路 PMBus Power Supply Data Logger RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX34446ETL+T | 功能描述:监控电路 PMBus Power Supply Data Logger RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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