参数资料
型号: MAX34441ETL+T
厂商: Maxim Integrated Products
文件页数: 46/53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: 3,000
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: 带卷 (TR)
其它名称: 90-34441+TTR
PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
MFR_FAN_CONFIG (F1h)
The MFR_FAN_CONFIG command is used with FAN_CONFIG_1_2 to configure the fan. See the FAN_CONFIG_1_2
description for more details on this command. Table 32 described the MFR_FAN_CONFIG command.
Table_32._MFR_FAN_CONFIG
BIT
BIT_NAME
MEANING
The FREQ bit s set the PWM frequency. Note: The device does not support pulse stretching.
FREQ2
0
0
FREQ1
0
0
FREQ0
0
1
PWM_FREQUENCY
30Hz
50Hz
15:13
FREQ[2:0]
0
0
1
1
1
1
1
1
0
0
1
1
0
1
0
1
0
1
100Hz
150Hz
Reserved
Reserved
Reserved
25kHz
12
0
This bit alway s returns a 0.
The HYS bits determine the amount of hysteresis the device uses to determine how far the tem-
perature must fall below the temperature level threshold programmed in the LUT before switch-
ing to the lower PWM/RPM value. The hysteresis should be set lower than the minimum differ-
ence between two adjacent temperature steps. These bits are ignored if automatic fan control is
disabled.
11:10
HYS[1:0]
HSY1
0
0
1
1
HSY0
0
1
0
1
THERMAL_HYSTERESIS_( N C)
2
4
6
8
0 = Ramp to 100% PWM duty cycle if temp sensor faults (automatic fan mode) or if no
FAN_COMMAND_1 update occurs (manual fan mode) in any 10s period.
1 = Temp sensor fault or update rate to FAN_COMMAND_1 is ignored. Operate at the last
updated PWM/RPM value.
9
8
TSFO
TACHO
Note_1: A temp sensor fault is a faulty temperature sensor reading, not an overtemperature fault.
Note_2: In automatic fan mode, if the TSFO bit is set to 1, the device ignores a sensor fault and
uses the remaining assigned temperature sensors (if any) to control the fan PWM duty cycle; or,
if the fan has no available temperature sensors to use, it maintains the last updated PWM/RPM
fan value before the fault occurred.
0 = Ramp fan to 100% PWM duty cycle if fan fault is detected.
1 = Do not ramp fan to 100% PWM duty cycle if fan fault is detected.
Note: If the fan fault is removed after ramping the PWM to 100% duty cycle, normal fan opera-
tion is resumed.
46
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