MAX34441EVKIT# Maxim Integrated, MAX34441EVKIT# Datasheet

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... 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. ________________________________________________________________ _Maxim Integrated Products_ _ 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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

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

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PMBus 5-Channel Power-Supply Manager Figure 1. Automatic Fan Control ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller ABSOLUTE_MAXIMUM_RATINGS ...........................................................-0.3V to +5. RS ............................................................-0.3V to +0.3V SS All Other Pins Except REG18 and REG25 Relative to V ........................ -0. Continuous ...

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PMBus 5-Channel Power-Supply Manager DC_ELECTRICAL_CHARACTERISTICS_(continued 2.7V to 5.5V -40NC to +85NC, unless otherwise noted. Typical values are PARAMETER SYMBOL ADC Internal Reference Initial Accuracy (+25NC) ADC Full-Scale Input Voltage ADC Measurement Resolution ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 2 I C/SMBus_INTERFACE_ELECTRICAL_SPECIFICATIONS (V = 2.7V to 5.5V -40NC to +85NC, unless otherwise noted. Typical values are PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between ...

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PMBus 5-Channel Power-Supply Manager (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. TEMPERATURE 2.7 2.6 2.5 2 3.3V DD 2.3 2.2 2.1 2.0 -40 - TEMPERATURE (°C) WEAK PULLUP VOLTAGE vs. TIME AT POR ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller TOP VIEW A1/PG/TACHSEL PIN NAME 1 RS-4 Ground Reference for ADC4 Voltage Measurement 2, 21 Digital-Supply Return Node (Ground RS+4 Power-Supply ADC Voltage-Sense Input, Measurement Relative to RS-4 ...

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PMBus 5-Channel Power-Supply Manager PIN NAME PWM Margin Output #3. High impedance when the margining is disabled. A 100% duty cycle implies 20 PWM3 this pin is continuously high. Regulator for Low-Voltage Digital Circuitry. Bypass REG18 REG18 ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller REG25 V SS REG18 V SS MSDA MSCL SDA SCL RST ALERT FAULT CONTROL A0/MUXSEL A1/PG/TACHSEL 12 POWER CONTROL PULSE- 2.5V WIDTH VREG MODULATOR 1.8V VREG 4MHz POWER- ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller +3.3V ALERT CLOCK HOST DATA INTERFACE CONTROL RST ADDITIONAL DEVICES Multiple Device Connection Diagram SDA SCL RST MAX34441 ALERT #0 FAULT CONTROL A1/PG/TACHSEL A0/MUXSEL +3.3V SDA SCL RST MAX34441 ALERT #1 FAULT ...

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... VOUT_UV_FAULT_LIMIT 46h IOUT_OC_WARN_LIMIT 4Ah IOUT_OC_FAULT_LIMIT 4Fh OT_FAULT_LIMIT MAXQ is a registered trademark of Maxim Integrated Products, Inc. 14 Thermal monitoring can be accomplished using up to six temperature sensors, including an on-chip thermal sen- sor, four DS75LV digital thermometers, and a remote ther- microcontroller with M mal diode. Temperature offset can be added to individual sensors to compensate for thermal differences in a sys- tem ...

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PMBus 5-Channel Power-Supply Manager Table_1._PMBus_Command_Codes_(continued) CODE COMMAND_NAME 51h OT_WARN_LIMIT 5Eh POWER_GOOD_ON 5Fh POWER_GOOD_OFF 60h TON_DELAY 62h TON_MAX_FAULT_LIMIT 64h TOFF_DELAY 78h STATUS_BYTE 79h STATUS_WORD 7Ah STATUS_VOUT 7Eh STATUS_CML 80h STATUS_MFR_SPECIFIC 81h STATUS_FANS_1_2 8Bh READ_VOUT 8Ch READ_IOUT 8Dh READ_TEMPERATURE_1 90h READ_FAN_SPEED_1 98h ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller Table_1._PMBus_Command_Codes_(continued) loaded upon power-on reset or when the RST pin is asserted and the value shown in the Default_Value column is the value when shipped from the factory. “FIXED” in the Flash_Stored ...

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PMBus 5-Channel Power-Supply Manager The device supports the group command. With the group command, a host can write different data to multiple devices on the same serial bus with one long SLAVE_ADDRESS,_COMMAND_BYTE,_AND_DATA_WORD_FOR_DEVICE_1 SLAVE COMMAND S W ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 1 S 0001100 Host Sends or Reads Too Few Bits If for any reason the host does not complete writing a full byte or reading a full byte from the device before ...

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PMBus 5-Channel Power-Supply Manager Host Reads from a Write-Only Command When a read request is issued to a write-only command (CLEAR_FAULTS, STORE_DEFAULT_ALL, RESTORE_DEFAULT_ALL), the device does the following: 1) ACKs the address byte. 2) Ignores the command. 3) Sends all ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller Table_3._PMBus_Command_Code_Coefficients PARAMETER COMMANDS VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_OV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT Voltage VOUT_UV_FAULT_LIMIT POWER_GOOD_ON POWER_GOOD_OFF READ_VOUT MFR_VOUT_PEAK MFR_VOUT_MIN Voltage Scaling VOUT_SCALE_MONITOR IOUT_OC_WARN_LIMIT IOUT_OC_FAULT_LIMIT Current READ_IOUT MFR_IOUT_PEAK Current Scaling IOUT_CAL_GAIN OT_FAULT_LIMIT OT_WARN_LIMIT Temperature READ_TEMPERATURE_1 MFR_TEMPERATURE_PEAK READ_FAN_SPEED_1 ...

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PMBus 5-Channel Power-Supply Manager 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_ Value COMMAND_ COMMAND_NAME CODE 25h VOUT_MARGIN_HIGH 8Bh READ_VOUT If a ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller particular fault. Table 5 illustrates the required con- ditions and fault actions for specific parameters. System Watchdog Timer The device uses an internal watchdog timer that is inter- nally reset every 5ms. ...

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PMBus 5-Channel Power-Supply Manager Table_7._Fan_Control_Operation_Modes FAN_CONTROL_ FAN_OPERATIONAL_DETAILS MODE External host controls the fan speed by directly setting the fan Manual PWM PWM duty cycle values. External host controls the fan speed by setting target fan speed Manual RPM values. The ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller One or all of the six available temperature sensors can be used to control the fan speed. Each temperature sensor has an offset adjustment that allows monitor- ing specific temperature zones with ...

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PMBus 5-Channel Power-Supply Manager Figure 3 shows the fan spin-up process. When the fan is spinning up, the number of revolutions is checked every 200ms for up to 2s. When the number of cumulated revo- lutions is greater than or ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller A summary of the PMBus commands supported by the device are described in the following sections. The device can control up to five power supplies six temperature sensors, and a ...

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PMBus 5-Channel Power-Supply Manager The OPERATION command is used to turn the power supply on and off in conjunction with the CONTROL input pin. The OPERATION command is also used to cause the power supply to set the output voltage ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The ON_OFF_CONFIG command configures the combination of CONTROL input and PMBus OPERATION commands needed to turn the power supply on and off. This indicates how the power supply is commanded when power ...

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PMBus 5-Channel Power-Supply Manager The STORE_DEFAULT_ALL command instructs the device to transfer the device configuration information to the internal flash memory array. Not all information is stored. Only configuration data is stored, not any status, or opera- tional data. If ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The VOUT_MARGIN_LOW command loads the device with the voltage to which the power-supply output changed when the OPERATION command is set to margin low. If the power supply is ...

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PMBus 5-Channel Power-Supply Manager The FAN_CONFIG_1_2 command is used in conjunction with MFR_FAN_CONFIG to configure the fan. See the MFR_FAN_CONFIG (F1h) section for more details on this command. The FAN_CONFIG_1_2 command is described in Table 15. Table_15._FAN_CONFIG_1_2_Command_Byte BIT_ NAME 7 ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The VOUT_OV_FAULT_LIMIT command sets the value of the output voltage that causes an output overvoltage fault. The 2 data bytes are in DIRECT format. In response to the VOUT_OV_FAULT_LIMIT being exceeded, the ...

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PMBus 5-Channel Power-Supply Manager The IOUT_OC_WARN_LIMIT command sets the value of the current that causes an overcurrent warning. This value is typically less than the overcurrent fault threshold in IOUT_OC_FAULT_LIMIT. The 2 data bytes are in DIRECT format. In response ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The OT_WARN_LIMIT command sets the temperature, in degrees Celsius, of the selected temperature sensor at which an overtemperature warning is detected. The 2 data bytes are in DIRECT format. In response to ...

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PMBus 5-Channel Power-Supply Manager TON_DELAY sets the time, in milliseconds, from when a START condition is received (a valid OPERATION command or through the CONTROL pin when enabled) until the PSEN output is asserted. The undervoltage fault and warning are ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The STATUS_WORD command returns 2 bytes of information with a summary of the reason for a fault. The low byte of the STATUS_WORD is the same data as the STATUS_BYTE. Table 21 ...

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PMBus 5-Channel Power-Supply Manager The STATUS_MFR_SPECIFIC command returns 1 byte of information with a summary of the reason for a fault. The STATUS_MFR_SPECIFIC message content is described in Table 24. Table_24._STATUS_MFR_SPECIFIC BIT_ BIT_NAME This bit is set if the power ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The READ_FAN_SPEED_1 command returns the fan speed in RPM. READ_FAN_SPEED_1 is updated once a second, even if the fan is disabled. The PULSE bits in FAN_CONFIG_1_2 must be properly configured to receive ...

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PMBus 5-Channel Power-Supply Manager The MFR_MODE command is used to configure the device to support manufacturer specific commands. The MFR_ MODE command is described in Table 26. Table_26._MFR_MODE BIT_ BIT_NAME Setting this bit to 1 forces the device to log ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The MFR_VOUT_PEAK command returns the maximum actual measured output voltage. To reset this value to 0, write to this command with a data value of 0. Any values written to this command ...

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PMBus 5-Channel Power-Supply Manager Table_28._MFR_FAULT_RESPONSE_Codes RESPONSE_ [1:0] • Set the corresponding fault bit in the appropriate status register. 11 • Log fault into MFR_NV_FAULT_LOG if NV_LOG = 1. • Continue power-supply operation. • Shut down the power supply by deasserting ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller EACH FAULT IS WRITTEN INTO THE NEXT FAULT LOG RAM STATUS VOLTAGE CURRENT TEMPERATURE FAULT OCCURENCE FAN SPEED Figure 5. MFR_NV_FAULT_LOG If an error occurs while the device is attempting to write ...

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PMBus 5-Channel Power-Supply Manager Table_29._MFR_NV_FAULT_LOG_(continued) BYTE PARAMETER 42 MFR_VOUT_PEAK Page 4 44 RESERVED (0000h) 46 MFR_IOUT_PEAK Page 0 48 MFR_IOUT_PEAK Page 1 50 MFR_IOUT_PEAK Page 2 52 MFR_IOUT_PEAK Page 3 54 MFR_IOUT_PEAK Page 4 56 RESERVED (0000h) 58 MFR_TEMPERATURE_PEAK Page ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The MFR_TIME_COUNT command returns the number of seconds the device has been operating since the last time power was applied to the device, RST was toggled soft reset occurred. The ...

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PMBus 5-Channel Power-Supply Manager The MFR_TEMP_SENSOR_CONFIG command is used to configure the temperature sensors. Table 31 describes the MFR_TEMP_SENSOR_CONFIG command. Table_31._MFR_TEMP_SENSOR_CONFIG BIT BIT_NAME 0 = Temperature sensor disabled. 15 ENABLE 1 = Temperature sensor enabled. The OFFSET setting is used ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller 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 The FREQ ...

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PMBus 5-Channel Power-Supply Manager Table_32._MFR_FAN_CONFIG_(continued) BIT BIT_NAME The RAMP bits select how fast the device ramps the PWM from one duty cycle to another (either up or down). In PWM mode, the following table always applies. In RPM mode, the ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The MFR_FAN_LUT command is used to configure the LUT that controls the fan. The fan has an LUT that maps eight programmable temperature levels to eight programmable fan PWM duty-cycle levels (bit ...

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PMBus 5-Channel Power-Supply Manager If bit 6 in FAN_CONFIG_1_2 is set to zero, the FAN SPEED STEP sets the fan PWM duty cycle at each temperature step breakpoint. The valid duty cycle range 100 (inclusive). Any values ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller The MFR_READ_FAN_PWM command returns the latest real-time value for the fan PWM in % duty cycle. MFR_READ_FAN_PWM is updated whenever the PWM duty cycle is updated. This is determined by the RATE ...

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PMBus 5-Channel Power-Supply Manager Applications Information Power-Supply Decoupling To achieve the best results when using the device, decouple the V power supply with a 0.1FF capacitor. DD Use a high-quality, ceramic, surface-mount capacitor if possible. Surface-mount components minimize lead inductance, ...

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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller CHANNELS DS75LV TEMP SENSOR +3.3V HOST INTERFACE For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages._Note that a “+”, “#”, or “-” ...

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