Datasheet LTM4664 (Analog Devices) - 5

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ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the internal operating junction temperature. TA = 25°C, VINS1 = 48V, and RUNn = 5V where n = stage # unless otherwise noted. See Figure 46 configuration for setup. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS 4:1 Divider Section
VINS1 Input DC Voltage Stage 1 Note 4 30 58 V VINS2 Input DC Voltage Stage 2 Note 4 15 29 V VOUT1 Range VOUT1 Output Range Note 4 15 29 V VOUT2 Range VOUT2 Output Range Note 4 7.5V 14.5 V Maximum Power Maximum Output Power All Conditions, Note 4 75 W VOUT1(DC) VOUT1 OUTPUT Note 4, Based on Figure 49 l 23.5 24 24.5 V VINS1 = 48V, RUN = 5V, IVOUT1 = 0A VOUT2(DC) VOUT2 OUTPUT Note 4, Based on Figure 49 l 11.5 12 12.5 V VINS2 = 24V, RUN = 5V, IVOUT2 = 0A VUVLO Undervoltage Lockout INTVCC Falling 4.85 V INTVCC Rising 5.05 V IQ VINSn VINS1, VINS2 Quiescent Current Each RUNn = 0V 150 µA Stage RUNn = 5V, No Switching 1.6 mA RUNn = 5V, Switching 44 mA
Overcurrent Protection Section
INSNSS1+ Stage 1 Current Sense+ INSNSS1+ = INSNSS1– = 60V 220 350 µA VOUT1 = 30V, RUNS1 = 5V INSNSS2+ Stage 2 Current Sense+ INSNSS2+ = INSNSS2– = 30V 220 350 µA VOUT2 = 15V, RUNS2 = 5V INSNSS1– Stage 1 Current Sense– INSNSS1+ = INSNSS1– = 60V, l –5 1 5 µA RUNS1 = 0V INSNSS2– Stage 2 Current Sense– INSNSS2+ = INSNSS2– = 30V, l –5 1 5 uA RUNS2 = 0V INSNSS1, INSNSS2 Current Limit Threshold l 45 50 55 mV Threshold for Each Stage
Pre Charge Balance
RVINS2F VINS2 Resistance to GND See Block Diagram (Note 10) 1 MΩ RVF2 Resistance Between Pins See Block Diagram 1 kΩ VINS2 to VINS2F Part of a RC Filter Stage 2 INSNSS1+ Balance Stage 1 Current Sense + Source Pre-Balance Phase VINS1 = 60V 95 mA Current INSNSS1+ = INSNSS1– = 60V, VOUT1 = 15V , Timer = 1V INSNSS2+ Balance Stage 2 Current Sense + Source Pre-Balance Phase VINS2 = 30V 95 mA Current INSNSS2+ = INSNSS2– = 30V, VOUT2 = 10V, Timer = 1V ISOURCE VOUTn ISOURCE Current to Pre-Start Up Bal- INSNSSn = VINSn = 24V VOUTn = 10V, Timer = 0.8V 95 mA ance VOUTn and CFLYn, n = Stage # See Block Diagram ISINK VOUTn ISINK Current to Pre-Start Up Balance INSNSSn = VINSn = 24V VOUTn = 11V, Timer = 0.8V 50 mA VOUTn and CFLYn, n = Stage # See Block Diagram
RUNn Pins
VTH_RUNn Run PIN Threshold VRUN Rising l 1.1 1.22 1.4 V n = Stage # VRUNn HYS Run Pin Hysteresis 90 mV n = Stage # Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics 4:1 Divider Block Diagram Dual 25A Power System Management (PSM) Block Diagram 4:1 Divider Operation 4:1 Divider Description Main Control INTVCCS1,2/EXTVCCS1,2 Power Start-Up and Shutdown Fault Protection and Thermal Shutdown High Side Current Sensing Frequency Selection Power Good and UV (PGOODSn and UVSn pins) Additional Overvoltage Protection 4:1 Divider Application Information Voltage Divider Pre-Balance Before Switching Overcurrent Protection Window Comparator Programming Effective Open Loop Output Resistance and Load Regulation Undervoltage Lockout Fault Response and Timer Programming Design Example Dual 25A PSM Operation PSM Section Overview, Major Features EEPROM with ECC Power-Up and Initialization Soft-Start Time-Based Sequencing Voltage-Based Sequencing Shutdown Light-Load Current Operation Switching Frequency and Phase PWM Loop Compensation Output Voltage Sensing INTVCC/EXTVCC Power Output Current Sensing and Sub Milliohm DCR Current Sensing Input Current Sensing PolyPhase Load Sharing External/Internal Temperature Sense RCONFIG (Resistor Configuration) Pins Fault Detection and Handling Status Registers and ALERT Masking Mapping Faults to FAULT Pins Power Good Pins CRC Protection Serial Interface Communication Protection Device Addressing Responses to VOUT and IIN/IOUT Faults Output Overvoltage Fault Response Output Undervoltage Response Peak Output Overcurrent Fault Response Responses to Timing Faults Responses to VIN OV Faults Responses to OT/UT Faults Internal Overtemperature Fault Response External Overtemperature and Undertemperature Fault Response Responses to Input Overcurrent and Output Undercurrent Faults Responses to External Faults Fault Logging Bus Timeout Protection Similarity Between PMBus, SMBus and I2C 2-Wire Interface PMBus Serial Digital Interface Figure 11 thru Figure 28 PMBus Protocols PMBus Command Summary PMBus Commands Dual 25A PSM Applications Information VIN to VOUT Step-Down Ratios Input Capacitors Output Capacitors Light Load Current Operation Switching Frequency and Phase Output Current Limit Programming Minimum On-Time Considerations Variable Delay Time, Soft-Start and Output Voltage Ramping Digital Servo Mode Soft Off (Sequenced Off) Undervoltage Lockout Fault Detection and Handling Open-Drain Pins Phase-Locked Loop and Frequency Synchronization Input Current Sense Amplifier Programmable Loop Compensation Checking Transient Response PolyPhase® Configuration Connecting the USB to I2C/SMBus/PMBus Controller to the LTM4664 In-System LTpowerPlay: An Interactive GUI for Digital Power PMBus Communication and Command Processing Thermal Considerations and Output Current Derating Table 10 and Table 11: Output Current Derating (Based on Demo Board) Dual 25A PSM Applications Information–Derating Curves EMI Performance Safety Considerations Layout Checklist/Example Typical Applications PMBus Command Details Addressing and Write Protect General Configuration Commands On/Off/Margin PWM Configuration Voltage Input Voltage and Limits Output Voltage and Limits Output Current and Limits Input Current and Limits Temperature External Temperature Calibration Timing Timing—On Sequence/Ramp Timing—Off Sequence/Ramp Precondition for Restart Fault Response Fault Responses All Faults Fault Responses Input Voltage Fault Responses Output Voltage Fault Responses Output Current Fault Responses IC Temperature Fault Responses External Temperature Fault Sharing Fault Sharing Propagation Fault Sharing Response Scratchpad Identification Fault Warning and Status Telemetry NVM Memory Commands Store/Restore Fault Logging Block Memory Write/Read Package Description Typical Applications Related Parts