MAX34441ETL+ Maxim Integrated Products, MAX34441ETL+ Datasheet
MAX34441ETL+
Specifications of MAX34441ETL+
Related parts for MAX34441ETL+
MAX34441ETL+ Summary of contents
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... 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 PART MAX34441ETL+ MAX34441ETL+T +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. *EP = Exposed pad. Features 2 C Digital Ordering Information ...
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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. ...
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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 ...
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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 ...
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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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PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller Detailed Description The MAX34441 is a highly integrated system monitor based upon a 4MHz, 16-bit, MAXQ factory-programmed functionality to monitor up to five power supplies and a system cooling fan. The device ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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) ...
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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 ...
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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 ...
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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. ...
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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 www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” ...
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