max5961 Maxim Integrated Products, Inc., max5961 Datasheet
max5961
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max5961 Summary of contents
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... ALERT signal is asserted. In addition to the ALERT signal, depending on the select- ed operating mode, the MAX5961 can deassert a power-good signal and/or turn-off the external MOSFET. The MAX5961 is available in a 48-pin thin QFN pack- age and operates over the -40°C to +85°C extended temperature range. ® ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor ABSOLUTE MAXIMUM RATINGS IN, SENSE_, MON_, GATE_ to AGND ....................-0.3V to +30V PG_, ON_, FAULT_, SDA, SCL, ALERT, REG, DREG, POL, RETRY, HWEN .........................-0.3V to +6V DREG to ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor ELECTRICAL CHARACTERISTICS (continued 2.7V to 16V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Current Measurement Error, ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor ELECTRICAL CHARACTERISTICS (continued 2.7V to 16V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Slow Current-Limit Response ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor ELECTRICAL CHARACTERISTICS (continued 2.7V to 16V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL ...
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... GATE_ MON_ ON_ INPUT THRESHOLD VOLTAGE vs. TEMPERATURE 0.615 0.610 0.605 0.600 0.595 0.590 0.585 0.580 0.575 85 -40 - TEMPERATURE (°C) TURN-OFF WAVEFORM (SLOW-COMPARATOR FAULT) MAX5961 toc11 I LOAD_ V GATE_ V MON_ V FAULT_ DEFAULT RESISTOR SETTINGS 25mV SENSE RANGE 200μs/div ) 4.0 4.5 5 ...
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... LOAD_ V , GATE_ V MON_ V FAULT_ 2.0 2.5 3.5 4.0 CURRENT BUFFER vs. TIME 4.0 CIRCULAR BUFFER CONTENT AT SLOW-TRIP FAULT 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 TIME (ms) SLOW-COMPARATOR FAULT EVENT MAX5961 toc14 I LOAD_ V GATE_ V MON_ V FAULT_ 200μs/div CURRENT ADC ACCURACY vs SENSE_ MON_ ...
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... See the Typical Application Circuit .) CURRENT BUFFER vs. TIME 4 CURRENT DATA AT SHORT CIRCUIT 3 ON POWER- -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 TIME (ms) STARTUP INTO SHORT LOAD 4ms/div 8 _______________________________________________________________________________________ Typical Operating Characteristics (continued) 2.0 2.5 MAX5961 toc18 V ON_ I LOAD_ V , GATE_ V MON_ V FAULT_ VOLTAGE BUFFER vs. TIME 5.0 VOLTAGE DATA AT SHORT CIRCUIT ON 4.5 POWER-UP 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor PIN NAME Channel 1 Current-Sense Input. Connect SENSE1 to the source of an external MOSFET and to one end of 1 SENSE1 R (see the Typical Application Circuit). ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor PIN NAME Channel 4 Current-Sense Input. Connect SENSE4 to the source of an external MOSFET and to one end of 29 SENSE4 R (see the Typical Application Circuit). ...
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... Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor MAX5961 FROM CONFIGURATION REGISTERS CIRCUIT- BREAKER DAC 4 SENSE_ 4 MON_ 500mA 4 CHARGE GATE_ PUMP 4 ILIM_ UVLO IN LDO REG ______________________________________________________________________________________ SLOW RATIO FAST VOLTAGE SCALER AND MULTIPLEXER REF/BIAS 10-BIT ADC AGND DGND ...
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... ON3 ** GATE3 SENSE3 R SENSE3 MON3 GND1 TO LOAD GND3 *HOT-SWAPPABLE SUPPLY RANGE, VS_ = 0 TO 16V. **OPTIONAL COMPONENTS. 12 ______________________________________________________________________________________ Typical Operating Circuit V DD μ MAX5961 1μF CONFIGURATION 1μF SETTING V DD VS2* VS4* ON2 ** GATE2 SENSE2 R SENSE2 MON2 TO LOAD ON4 ** GATE4 SENSE4 R ...
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... SUPPLY RANGE, VS_ = 0 TO 16V ______________________________________________________________________________________ Typical Application Circuit V DD μ 3.9kΩ 100kΩ 3.9kΩ 100kΩ ID 100kΩ SETTING SENSE2 MAX5961 SENSE4 1μF 10Ω CONFIGURATION SETTING 1μF DD VS2* VS4* ON2 1kΩ 4700pF GATE2 R SENSE2 5MΩ MON2 TO LOAD ON4 1kΩ ...
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... Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Detailed Description The MAX5961 0 to 16V, quad, hot-swap controller pro- vides complete protection for multisupply systems. The device allows the safe insertion and removal of circuit cards into live backplanes. The MAX5961 is an advanced hot-swap controller that monitors voltage and current with an internal 10-bit ADC ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Table 1a. Register Address Map (Channel Specific) (continued) REGISTER DESCRIPTION High 8 bits ([9:2]) of uv1_chx_h undervoltage warning (UV1) threshold Low 2 bits ([1:0]) of uv1_chx_l undervoltage warning ...
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... Reset control bits for peak-detection registers peak_log_hold Hold control bits for peak-detection registers Grouping Hot-Swap Channels Depending on the state of the MODE input, the four- channel MAX5961 can operate as four independent Table 2. Grouping Hot-Swap Channels MODE INPUT MODE [1] MODE [0] STATUS Low ...
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... ON_ bit in reg- ON_ ister status1[3:0] is set to 1. The inputs Chx_EN1 and Chx_EN2 can be set using the I Chx_EN1 bits have a default value of 0. This makes it possible to enable or disable each of the MAX5961 channels independently with or without using the I interface (see Tables 3, 4a, and 4b). R/W R/W ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Table 4b. status1 Register Format Channel grouping (three-state MODE input), fault-detection behavior (three-state PROT input), and Description: ON_ inputs status register Register Title: status1 Register Address: 0x60 R ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor When all conditions for channel turn-on are met, the external n-channel MOSFET switch is fully enhanced with a typical gate-to-source voltage of 5.5V to ensure a low drain-to-source ...
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... DAC = V TH,ST The MAX5961 provides a great deal of system flexibility because the current-sense range, DAC setting, and x 120% threshold ratio can be changed “on the fly” for systems that must protect a wide range of interchangeable load ...
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... Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor When an overcurrent event causes the MAX5961 to shut down a channel, a corresponding open-drain FAULT_ output alerts the system. Figure 3 shows the Table 6. Specified Current-Sense and Circuit-Breaker Threshold Ranges CURRENT- ILIM_ SPECIFIED FAST-TRIP ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor V > 2. CONTINUOUSLY SAMPLE VOLTAGE AND CURRENT, UPDATE MIN-MAX VALUES, 2 HANDLE I C COMMUNICATIONS, STORE SAMPLES TO CIRCULAR BUFFERS... CIRCUIT-BREAKER TRIP? NO SET FAULT_, ...
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... R/W R/W bit 4 bit 3 used throughout the MAX5961 for all 10-bit ADC con- version results and 10-bit digital comparator thresholds. Once the PG_ output is asserted (see the Digital Voltage 2 C interface. Monitoring and Power-Good Outputs section), the most recent current samples are continuously compared to the programmable overcurrent warning register values ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Table 11. Overcurrent Warning Threshold Register Format (High-Order Bits) Description: Overcurrent warning threshold, high-order bits [9:2] Register Titles: oc_ch1_h Register Addresses: 0x3A R/W R/W R/W oc_9 oc_8 oc_7 ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Table 14. ADC Minimum Current Conversion Register Format (Low-Order Bits) Description: Minimum current conversion result, low-order bits [1:0] Register Titles: min_ch1_cs_l Register Addresses: 0x11 R/W R/W R/W bit ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Digital Voltage Monitoring and Power-Good Outputs The voltage at the load (MON_ inputs) is sampled by the internal ADC. The MON_ full-scale voltage for each channel can be ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Digital Undervoltage and Overvoltage Detection Thresholds The most recent voltage values are continuously com- pared to four programmable limits, comprising two Table 21. Undervoltage Warning Threshold Register Format ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Table 25. Overvoltage Warning Threshold Register Format (High-Order Bits) Description: Overvoltage warning threshold high-order bits [9:2] Register Titles: ov1_ch1_h Register Addresses: 0x36 R/W R/W R/W ov1_9 ov1_8 ov1_7 ...
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... ALERT output is asserted low. Depending on the status of the prot[] bits in register status1[7:6], the MAX5961 can also deassert the PG_ output or turn off the external MOSFET when the voltage is outside the critical limits (see Figure 4). Table 29 shows the behav- ior for the three possible states of the PROT input ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Power-Good Detection and PG_ Outputs The PG_ output for a given channel is asserted when the voltage at MON_ is between the undervoltage and overvoltage critical limits. The ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Minimum and Maximum Value Detection for Voltage Measurement Values All voltage measurement values are compared with the contents of minimum- and maximum-value registers, and if the most recent ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor Table 35. ADC Maximum Voltage Conversion Register Format (Low-Order Bits) Description: Maximum voltage conversion result, low-order bits [1:0] Register Titles: max_ch1_mon_l Register Addresses: 0x17 R/W R/W R/W bit ...
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... MAX5961 takes action as determined Table 38. OC Warning Comparators Deglitch Enable Register Format Description: Deglitch enable register for overcurrent warning digital comparators ...
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... The buffers allow the user to recall the voltage and cur- rent waveforms for analysis and troubleshooting. The buffer contents are accessed through the I at eight fixed addresses in the MAX5961 register address space (see Table 41). Each of the eight buffers can also be stopped under user control by register cbuf_chx_store (see Table 42) ...
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... The MAX5961 stays off if the RETRY input is set low (latched-off), and will autoretry if the RETRY input is high. The RETRY input is read once during initialization and sets the value of bit 6 of the status3 register (see Table 30). ...
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... Fault Logging and Indications The MAX5961 provides detailed information about any fault conditions that have occurred. Independent FAULT_ outputs specifically indicate circuit-breaker shutdown events, while an ALERT output is asserted whenever a problem has occurred that requires atten- tion or interaction. ...
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... Autoretry or Latched-Off Fault Management section. When an overcurrent event (fast-trip or slow-trip) causes the MAX5961 to shut down the affected channel(s), a cor- responding open-drain FAULT_ output is asserted low. Note that the FAULT_ outputs are not asserted for shut- downs caused by critical undervoltage or overvoltage ...
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... The MAX5961 features an I C-compatible serial interface consisting of a serial-data line (SDA) and a serial-clock line (SCL). SDA and SCL allow bidirectional communica- tion between the MAX5961 and the master device at clock rates from 100kHz to 400kHz. The I have several devices (e.g., more than one MAX5961 ...
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... Current and Voltage Monitor Each clock pulse transfers one data bit. The data on SDA must remain stable while SCL is high (see Figure 6), otherwise the MAX5961 registers a START or STOP condition (see Figure 7) from the master. SDA and SCL idle high when the bus is not busy. ...
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Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor SEND BYTE FORMAT S ADDRESS WR ACK DATA ACK 7 BITS 0 8 BITS SLAVE ADDRESS– DATA BYTE–PRESETS THE EQUIVALENT TO CHIP- INTERNAL ADDRESS POINTER. SELECT LINE OF ...
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... In the event of an unsuccessful data transfer, the bus master should reat- tempt communication at a later time. The MAX5961 gen- erates a not acknowledge (NACK) after the slave address during a software reboot or when receiving an illegal memory address ...
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... For the con- figuration registers, valid address pointers range from 0x00 to 0x74, and the circular buffer addresses are 0x80 to 0x87. Register addresses outside this range result in a NACK being issued from the MAX5961. Table 52. Circular Buffer Readout Sequence READ-OUT ORDER 1st OUT ...