Overview
The ADM1073ARUZ-REEL, produced by Analog Devices Inc., is a full-feature, negative voltage hot swap controller. This component is designed to enable safe insertion and removal of boards from a live −48 V backplane, making it ideal for high-reliability applications such as telecommunications, data communication equipment, and high-availability servers. The ADM1073 provides robust current limiting and protection against both transient and nontransient short circuits, ensuring reliable operation under various voltage conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | −18 V to −80 V | V |
| Transient Voltage Tolerance | Up to −200 V | V |
| Inrush Current Limit | Programmable via RSENSE | A |
| Soft Start Function | Controlled by external capacitor on SS pin | |
| Undervoltage Threshold | Typically −36 V | V |
| Overvoltage Threshold | Typically −80 V | V |
| PWM Duty Cycle | Default 6%, adjustable | % |
| Maximum Consecutive Autorestarts | Seven |
Key Features
- Precise and robust current limiting to prevent overcurrent conditions.
- Protection against transient and nontransient short circuits.
- Inrush current control via external N-channel FET gate drive.
- Soft start function to manage inrush current profile.
- Programmable operating voltage window using UV and OV pins.
- Limited consecutive retry scheme with automatic shutdown after seven retries.
- PWRGD and SPLYGD output signals for power module enable and supply status indication.
- Level-triggered device shutdown and reset via SHDN pin.
Applications
- Central office switching and telecommunications equipment.
- Data communication equipment.
- −48 V distributed power systems.
- High availability servers and −48 V power supply modules.
- Disk arrays and other high-reliability systems.
Q & A
- What is the primary function of the ADM1073ARUZ-REEL?
The primary function is to enable safe insertion and removal of boards from a live −48 V backplane while providing robust current limiting and protection against short circuits. - What is the operating voltage range of the ADM1073ARUZ-REEL?
The operating voltage range is from −18 V to −80 V. - How does the ADM1073ARUZ-REEL manage inrush current?
Inrush current is managed through the control of an external N-channel FET gate drive and a soft start function controlled by an external capacitor on the SS pin. - What are the undervoltage and overvoltage thresholds for the ADM1073ARUZ-REEL?
The undervoltage threshold is typically −36 V, and the overvoltage threshold is typically −80 V. - How many consecutive autorestarts can the ADM1073ARUZ-REEL perform before shutting down?
The ADM1073ARUZ-REEL can perform up to seven consecutive autorestarts before shutting down. - What signals does the ADM1073ARUZ-REEL provide for power status indication?
The ADM1073ARUZ-REEL provides PWRGD and SPLYGD output signals for power module enable and supply status indication. - How can the device be shut down and reset?
The device can be shut down and reset via the level-triggered SHDN pin. - What is the purpose of the TIMER pin on the ADM1073ARUZ-REEL?
The TIMER pin is used to set the maximum allowable time in current limit, the PWM on-time, and the PWM duty cycle via an external capacitor. - Can the PWM duty cycle of the ADM1073ARUZ-REEL be adjusted?
Yes, the PWM duty cycle can be adjusted using resistors between the TIMER pin and VEE or VIN. - What type of equipment is the ADM1073ARUZ-REEL commonly used in?
The ADM1073ARUZ-REEL is commonly used in central office switching, telecommunications, data communication equipment, high availability servers, and disk arrays.
