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Analog Devices LTC4284 | Demoboard DC2470A
High Power Negative Voltage Hot Swap Controller with I2C Energy Monitor and EEPROM
Overview
| Topology | Other Topology |
Description
The LTC®4284 negative voltage hot swap controller drives external N-channel MOSFETs to allow a board to be safely inserted and removed from a live backplane. The dual-gate, multi-mode drivers optimize the MOSFET safe oper¬ating area (SOA) for a variety of power levels. The SOA timer limits MOSFET temperature rise for reliable protec¬tion against overstresses. An I2C interface and onboard gear-shift ADC allow moni¬toring of board current, voltage, power, energy, and fault status. An available single-wire broadcast mode simplifies the interface by eliminating two isolators. The included EEPROM provides black-box capturing and nonvolatile configuration of fault behavior. Additional features respond to input UV/OV, interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a board, turn off the MOSFETs if an external supply monitor fails to indicate power good within a timeout period, and auto-reboot after a program¬mable delay following a host commanded turn-off.
Features
- Drives Two Gates for High Power Applications
- Configurable Parallel, Staged Start or Single Modes
- Protects MOSFET with SOA Timer
- Programmable 15mV to 30mV Current Limit Sense Voltage with 2% Accuracy and Adjustable Foldback
- 8-Bit to 16-Bit Gear-Shift ADC with 0.5% Accuracy
- Monitors Voltages, Currents, Power and Energy
- Nonvolatile Configuration and Fault Recording
- Floating Topology for Rugged High Voltage Operation
- Selectable Inrush Control: dV/dt or Current Limit
- I2C/SMBus or Single-Wire Broadcast Interfaces
- Min/Max ADC Measurement Logging with Alerts
- Reboots on I2C Command with Programmable Delay
- Adjustable Input UV/OV Thresholds and Hysteresis
- 44-Pin 5mm × 8mm QFN Package
Typical applications
- Telecom Infrastructure
- Servers and Data Centers
- –48V Distributed Power Systems / Power Monitors
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (mm) | f (mm) | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | Pins (Value) (pcs) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Color | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150080RS75000 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WL-SMCW SMT Mono-color Chip LED Waterclear | 2 | – | 625 | Red | 630 | 150 | 2 | AlInGaP | 140 | – | – | 0.7 | – | – | – | Tape and Reel | – | ||
| 150080GS75000 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WL-SMCW SMT Mono-color Chip LED Waterclear | 2 | – | 525 | Green | 515 | 450 | 3.2 | InGaN | 140 | – | – | 0.7 | – | – | – | Tape and Reel | – | ||
 | 60900213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.54 mm Multi-Jumper Jumper with Test Point | 2.44 | – | – | – | – | – | – | – | – | 1 | – | – | Jumper | – | 3 | Bag | Black | |
 | 62000421121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm THT Dual Pin Header | 4 | – | – | – | – | – | – | – | – | 4 | Dual | – | Pin Header | Straight | 2 | Bag | – | |
 | 61300211121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.54 mm THT Pin Header | 5.08 | – | – | – | – | – | – | – | – | 2 | Single | – | Pin Header | Straight | 3 | Bag | – | |
 | 61300421121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.54 mm THT Dual Pin Header | 5.08 | – | – | – | – | – | – | – | – | 4 | Dual | – | Pin Header | Straight | 3 | Bag | – | |
 | 62000621121 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm THT Dual Pin Header | 6 | – | – | – | – | – | – | – | – | 6 | Dual | – | Pin Header | Straight | 2 | Bag | – | |
 | 702935000 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WA-SNSR Self-Retaining Spacer | 12.7 | 4.8 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Natural | |
 | 60800213421 | SPEC | – | 3 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD 2.00 mm Jumper with Test Point | – | – | – | – | – | – | – | – | – | 2 | – | – | Jumper | – | 3 | Bag | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 150080RS75000 | SPEC | |
| 150080GS75000 | SPEC | |
| 60900213421 | SPEC | – |
| 62000421121 | SPEC | – |
| 61300211121 | SPEC | – |
| 61300421121 | SPEC | – |
| 62000621121 | SPEC | – |
| 702935000 | SPEC | – |
| 60800213421 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (mm) | f (mm) | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | Pins (Value) (pcs) | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Color | Samples |
|---|