Datasheet LTC3882-1 (Analog Devices) - 10

LTC3882-1
TYPICAL PERFORMANCE CHARACTERISTICS 3-Phase DC Output Current Load Step Transient Current Load Dump Transient Current Sharing (Using D12S1R845A Sharing (Using FDMF6707B Sharing (Using FDMF6707B Power Block DrMOS) DrMOS)
20 CHANNEL 1 18 CHANNEL 2 IOUT IOUT CHANNEL 3 20A/DIV 20A/DIV 16 V 14 OUT VOUT 20mV/DIV 12 20mV/DIV 10 IL1, IL2 IL1, IL2 10A/DIV 10A/DIV 8 PHASE CURRENT (A) 6 4 V 38821 G10 38821 G11 OUT = 1V 5µs/DIV VOUT = 1V 5µs/DIV V V 2 IN = 12V IN = 12V SYNC = 500kHz SYNC = 500kHz 0 L = 320nH L = 320nH 0 10 20 30 40 50 60 70 80 TOTAL RAIL CURRENT (A) 38821 G09
Efficiency and Power Loss vs 1-Phase Single Cycle Response Input Voltage 3-Phase Transient Response (Using D12S1R860A Power Block (1-Phase Using LTC4449) (Using D12S1R860A Power Block) with COUT = 6
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100µF X5R 1210)
100 3.0 VO = 1.8V 98 V 2.5 OUT 96 (20mV/DIV) IOUT 94 POWERLOSS (W) (10A/DIV) 2.0 92 VSW 90 1.5 (10V/DIV) 88 VOUT EFFICIENCY (%) (10mV/DIV) 1.0 25mVP-P I 86 OUT (10A/DIV) 84 0.5 38821 G13 38821 G14 82 POWER FET: BSC050N04LS G 100µs/DIV 2µs/DIV SYNC FET: BSC010N04LS VOUT = 0.9V/90A VOUT = 1V/25A 80 0 V V 5 10 15 20 25 30 IN = 12V IN = 12V SYNC = 500kHz SYNC = 1MHz VIN (V) L = 210nH L = 210nH 38821 G12
3+1 Channel Crosstalk (Using D12S1R845A Power Load Step Transient Response Line Step Transient Response Blocks) Using AVP (1-phase Using LTC4449)
VOUT0 (1-PHASE) IO 20mV/DIV 10A/DIV VIN 7V V 2V/DIV OUT1 (3-PHASE) 20mV/DIV I 1.8V OUT1 25% 10A/DIV LOAD STEP VOUT V 50mV/DIV OUT 10mV/DIV 100µs/DIV 38821 G15 200µs/DIV 38821 G16 200µs/DIV 38821 G17 Rev B 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Timing Diagram Operation Overview Main Control Loop Power-Up and Initialization Soft-Start Time-Based Output Sequencing Output Ramping Control Voltage-Based Output Sequencing Minimum Output Disable Times Output Short Cycle Light Load Current Operation Switching Frequency and Phase PolyPhase Load Sharing Active Voltage Positioning Input Supply Monitoring Output Voltage Sensing and Monitoring Output Current Sensing and Monitoring External and Internal Temperature Sense Resistor Configuration Pins Internal EEPROM with CRC and ECC Fault Detection Input Supply Faults Hardwired PWM Response to VOUT Faults Power Good Indication (Master) Power Good Indication (Slave) Hardwired PWM Response to IOUT Faults Hardwired PWM Response to Temperature Faults Hardwired PWM Response to Timing Faults External Faults Fault Handling Status Registers and ALERT Masking FAULT Pin I/O Fault Logging Factory Default Operation Serial Interface Serial Bus Addressing Serial Bus Timeout Serial Communication Errors PMBus Command Summary PMBus Commands Data Formats Applications Information Efficiency Considerations PWM Frequency and Inductor Selection Power MOSFET Selection MOSFET Driver Selection Using PWM Protocols CIN Selection COUT Selection Feedback Loop Compensation PCB Layout Considerations Output Current Sensing Output Voltage Sensing Soft-Start and Stop Time-Based Output Sequencing and Ramping Voltage-Based Output Sequencing Using Output Voltage Servo Using AVP PWM Frequency Synchronization PolyPhase Operation and Load Sharing External Temperature Sense Resistor Configuration Pins Internal Regulator Outputs IC Junction Temperature Derating EEPROM Retention at Temperature Configuring Open-Drain Pins PMBus Communication and Command Processing Status and Fault Log Management LTpowerPlay – An Interactive Digital Power GUI Interfacing to the DC1613 Design Example PMBus COMMAND DETAILS Addressing and Write Protect PAGE PAGE_PLUS_WRITE PAGE_PLUS_READ WRITE_PROTECT MFR_ADDRESS MFR_RAIL_ADDRESS General Device Configuration PMBUS_REVISION CAPABILITY On, Off and Margin Control ON_OFF_CONFIG MFR_CONFIG_ALL_LTC3882-1 OPERATION MFR_RESET PWM Configuration FREQUENCY_SWITCH MFR_PWM_CONFIG_LTC3882-1 MFR_CHAN_CONFIG_LTC3882-1 MFR_PWM_MODE_LTC3882-1 Input Voltage and Limits VIN_ON VIN_OFF VIN_OV_FAULT_LIMIT VIN_UV_WARN_LIMIT Output Voltage and Limits VOUT_MODE VOUT_COMMAND MFR_VOUT_MAX VOUT_MAX MFR_VOUT_AVP VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_OV_FAULT_LIMIT VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_UV_FAULT_LIMIT Output Current and Limits IOUT_CAL_GAIN MFR_IOUT_CAL_GAIN_TC IOUT_OC_FAULT_LIMIT IOUT_OC_WARN_LIMIT Output Timing, Delays, and Ramping MFR_RESTART_DELAY TON_DELAY TON_RISE TON_MAX_FAULT_LIMIT VOUT_TRANSITION_RATE TOFF_DELAY TOFF_FALL TOFF_MAX_WARN_LIMIT External Temperature and Limits MFR_TEMP_1_GAIN MFR_TEMP_1_OFFSET OT_FAULT_LIMIT OT_WARN_LIMIT Status Reporting STATUS_BYTE UT_FAULT_LIMIT STATUS_WORD STATUS_VOUT STATUS_IOUT STATUS_INPUT STATUS_TEMPERATURE STATUS_CML STATUS_MFR_SPECIFIC MFR_PADS_LTC3882-1 MFR_COMMON MFR_INFO CLEAR_FAULTS Telemetry READ_VIN MFR_VIN_PEAK READ_VOUT MFR_VOUT_PEAK READ_IOUT MFR_IOUT_PEAK READ_POUT READ_TEMPERATURE_1 MFR_TEMPERATURE_1_PEAK READ_TEMPERATURE_2 MFR_TEMPERATURE_2_PEAK READ_DUTY_CYCLE READ_FREQUENCY MFR_CLEAR_PEAKS Fault Response and Communication VIN_OV_FAULT_RESPONSE VOUT_OV_FAULT_RESPONSE VOUT_UV_FAULT_RESPONSE IOUT_OC_FAULT_RESPONSE OT_FAULT_RESPONSE UT_FAULT_RESPONSE MFR_OT_FAULT_RESPONSE TON_MAX_FAULT_RESPONSE MFR_RETRY_DELAY SMBALERT_MASK MFR_FAULT_PROPAGATE_LTC3882-1 MFR_FAULT_RESPONSE MFR_FAULT_LOG Fault Log Operation MFR_FAULT_LOG_CLEAR EEPROM User Access STORE_USER_ALL RESTORE_USER_ALL MFR_COMPARE_USER_ALL MFR_FAULT_LOG_STORE MFR_EE_xxxx USER_DATA_0x Unit Identification MFR_ID MFR_MODEL MFR_SERIAL MFR_SPECIAL_ID Typical Applications Package Description Revision History Typical Application Related Parts