Rainbow-electronics MAX34441 Bedienungsanleitung

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_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
MAX34441
19-5488; Rev 0; 8/10
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
Ordering Information
General Description
The MAX34441 is a complex system monitor that can man-
age up to five power supplies and a fan. The power-supply
manager monitors the power-supply output voltage and
constantly checks for user-programmable overvoltage and
undervoltage thresholds. It can also margin the power-
supply output voltage up or down to a user-programma-
ble level. The margining is performed in a closed-loop
arrangement whereby the device automatically adjusts
a pulse-width-modulated (PWM) output and then mea-
sures the resultant output voltage. The power-supply
manager can also sequence the supplies in any order
at both power-up and power-down. With the addition of
an external current-sense amplifier, the device can also
monitor currents.
The device also contains closed-loop fan-speed control.
Based on user-programmable settings for fan-control
PWM duty cycles or RPM speeds at particular tempera-
ture breakpoints, the device automatically adjusts the fan
speed in a manner to reduce audible noise and power
consumption.
Applications
Network Switches/Routers
Base Stations
Servers
Smart Grid Network Systems
Industrial Controls
Features
S 5 Channels of Power-Supply Management
Voltage Measurement/Monitoring
Differential 12-Bit 1% Accurate ADC
Min/Max Threshold Excursion Detection
Supports Current Monitoring with External
Current-Sense Amplifier
Automatic Closed-Loop Margining
Programmable Up and Down Sequencing
Power-Good Output
S 1 Channel of Fan Control
Supports 3-Wire and 4-Wire Fans
Automatic Closed-Loop Fan-Speed Control
Support for Dual Tachometer Fans
Fan-Fault Detection
S Supports Up to Six Temperature Sensors
External Thermal Diode Interface with
Automatic Series Resistance Cancellation
One Internal Temperature Sensor
Support for Up to Four Additional I
2
C Digital
Temp Sensor ICs
Fault Detection on All Temp Sensors
S PMBus™-Compliant Command Interface
S I
2
C/SMBus™-Compatible Serial Bus with Bus
Timeout Function
S On-Board Nonvolatile Fault Logging and Default
Configuration Setting
S No External Clocking Required
S +3.3V Supply Voltage
PMBus is a trademark of SMIF, Inc.
SMBus is a trademark of Intel Corp.
PART TEMP RANGE PIN-PACKAGE
MAX34441ETL+
-40NC to +85NC
40 TQFN-EP*
MAX34441ETL+T
-40NC to +85NC
40 TQFN-EP*
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata.
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Inhaltsverzeichnis

Seite 1 - MAX34441

_______________________________________________________________ Maxim Integrated Products 1For pricing, delivery, and ordering information, pleas

Seite 2

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444110

Seite 3

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444111 Pin

Seite 4

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444112

Seite 5

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444113 Multiple Device Co

Seite 6

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444114Table 1. PMBus Command Codes Detailed DescriptionThe

Seite 7

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444115Table 1. PMBus Command Codes (continued)Note 1: Common commands are shad

Seite 8

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444116Address SelectOn device power-up, the device samples the A0 and A1 pins t

Seite 9

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444117Group CommandThe device supports the group command. With the group

Seite 10

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444118Host Sends or Reads Too Few BitsIf for any reason the host does not compl

Seite 11

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444119Host Reads from a Write-Only CommandWhen a read request is issued t

Seite 12

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344412TABLE OF CONTENTSAbsolute Maximum Ratings . . . . . . . . . . . . . . . .

Seite 13

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444120Interpreting Received DIRECT Format ValuesThe host system uses the follow

Seite 14

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444121The following example demonstrates how the host can send and retri

Seite 15

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444122particular fault. Table 5 illustrates the required con-ditions and fault

Seite 16

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444123Table 7. Fan Control Operation ModesNote: The RPM modes should only be us

Seite 17

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444124Figure 2. Fan Speed ExampleOne or all of the six available temperature se

Seite 18

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444125Figure 3. Fan Spin-UpFan Spin-UpFigure 3 shows the fan spin-up process. W

Seite 19

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444126

Seite 20

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444127Table 9. OPERATION Command Byte (When Bit 3 of ON_OFF_CONFIG = 1)Table 10

Seite 21

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444128ON_OFF_CONFIG (02h)The ON_OFF_CONFIG command configures the combination o

Seite 22

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444129STORE_DEFAULT_ALL (11h)The STORE_DEFAULT_ALL command instructs the devi

Seite 23

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344413TABLE OF CONTENTS (continued)Fan Control Operation . . . . . . . . . . .

Seite 24

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444130VOUT_MARGIN_LOW (26h)The VOUT_MARGIN_LOW command loads the device w

Seite 25

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444131FAN_CONFIG_1_2 (3Ah)The FAN_CONFIG_1_2 command is used in conjuncti

Seite 26

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444132VOUT_OV_FAULT_LIMIT (40h)The VOUT_OV_FAULT_LIMIT command sets the value o

Seite 27

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444133IOUT_OC_WARN_LIMIT (46h)The IOUT_OC_WARN_LIMIT command sets the value of

Seite 28

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444134OT_WARN_LIMIT (51h)The OT_WARN_LIMIT command sets the temperature, in deg

Seite 29

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444135TON_DELAY (60h)TON_DELAY sets the time, in milliseconds, from when a STAR

Seite 30

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444136STATUS_WORD (79h)The STATUS_WORD command returns 2 bytes of information w

Seite 31

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444137STATUS_MFR_SPECIFIC (80h)The STATUS_MFR_SPECIFIC command returns 1 byt

Seite 32

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444138READ_FAN_SPEED_1 (90h)The READ_FAN_SPEED_1 command returns the fan speed

Seite 33

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444139MFR_MODE (D1h)The MFR_MODE command is used to configure the device to sup

Seite 34

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344414TABLE OF CONTENTS (continued)STATUS_MFR_SPECIFIC (80h) . . . . . . . . .

Seite 35

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444140MFR_VOUT_PEAK (D4h)The MFR_VOUT_PEAK command returns the maximum actual m

Seite 36

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444141MFR_FAULT_RETRY (DAh)The MFR_FAULT_RETRY command sets the delay time betw

Seite 37

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444142If an error occurs while the device is attempting to write or clear the N

Seite 38

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444143Table 29. MFR_NV_FAULT_LOG (continued)Note: LOG_VALID is set to DDh if th

Seite 39

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444144MFR_TIME_COUNT (DDh)The MFR_TIME_COUNT command returns the number of seco

Seite 40

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444145MFR_TEMP_SENSOR_CONFIG (F0h)The MFR_TEMP_SENSOR_CONFIG command is used to

Seite 41

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444146MFR_FAN_CONFIG (F1h)The MFR_FAN_CONFIG command is used with FAN_CONFIG_

Seite 42

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444147Table 32. MFR_FAN_CONFIG (continued)Note: It is recommended that the fan

Seite 43

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444148MFR_FAN_LUT (F2h)The MFR_FAN_LUT command is used to configure the LUT tha

Seite 44

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444149Figure 6. Fan Lookup Table (LUT) FormatFAN SPEED STEP: Fan PWM Duty Cycle

Seite 45

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344415LIST OF TABLESTable 1. PMBus Command Codes. . . . . . . . . . . . . . . .

Seite 46

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444150MFR_READ_FAN_PWM (F3h)The MFR_READ_FAN_PWM command returns the lates

Seite 47

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444151 Applications InformationPower-Supply DecouplingTo achiev

Seite 48

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX3444152

Seite 49

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX34441Maxim cannot assume responsibility for use of any circuitry other than circ

Seite 50

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344416Stresses beyond those listed under “Absolute Maximum Ratings” may cause p

Seite 51

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344417DC ELECTRICAL CHARACTERISTICS (continued)(VDD = 2.7V to 5.5V, TA = -40NC t

Seite 52

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344418I2C/SMBus INTERFACE ELECTRICAL SPECIFICATIONS(VDD = 2.7V to 5.5V, TA = -40

Seite 53

PMBus 5-Channel Power-Supply Manager and Intelligent Fan ControllerMAX344419 Typical Operatin

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