Overview
The ADM1073ARUZ-REEL7, 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 telecommunication and data communication equipment, central office switching, and −48 V distributed power systems.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage Range | −18 V to −80 V |
| Transient Voltage Tolerance | Up to −200 V |
| Temperature Range | −40°C to +85°C |
| Package Type | 14-Lead TSSOP |
| Current Limiting | Programmable via RSENSE resistor |
| Inrush Current Control | Soft start function with external capacitor on SS pin |
| Undervoltage Threshold | Typically −36 V |
| Overvoltage Threshold | Typically −80 V |
| PWM Duty Cycle | Default 6%, adjustable |
Key Features
- Precise and robust current limiting to protect against transient and nontransient short circuits.
- Programmable inrush current control using an external capacitor on the soft start (SS) pin.
- Separate undervoltage (UV) and overvoltage (OV) detection pins with programmable thresholds.
- Limited consecutive retry scheme with automatic shutdown after seven retries.
- PWRGD output signal to enable power modules and indicate when the load capacitance is fully charged.
- SPLYGD output signal to indicate when the backplane supply is within the operating voltage range.
Applications
- Central office switching.
- Telecommunication and data communication equipment.
- −48 V distributed power systems.
- High availability servers.
- −48 V power supply modules.
- Disk arrays.
Q & A
- What is the primary function of the ADM1073ARUZ-REEL7? The primary function is to enable safe insertion and removal of boards from a live −48 V backplane.
- What is the operating voltage range of the ADM1073ARUZ-REEL7? The operating voltage range is from −18 V to −80 V.
- How does the ADM1073ARUZ-REEL7 control inrush current? It controls inrush current using a soft start function with an external capacitor on the SS pin.
- What are the undervoltage and overvoltage thresholds for the ADM1073ARUZ-REEL7? The undervoltage threshold is typically −36 V, and the overvoltage threshold is typically −80 V.
- What happens after seven successive autorestarts? After seven successive autorestarts, the fault is latched, and the part goes into shutdown, disabling the external FET until power is reset.
- What is the purpose of the PWRGD output signal? The PWRGD output signal is used to enable power modules and indicate when the load capacitance is fully charged.
- What is the purpose of the SPLYGD output signal? The SPLYGD output signal indicates when the backplane supply is within the externally programmable operating voltage range.
- What type of package does the ADM1073ARUZ-REEL7 come in? It comes in a 14-Lead TSSOP package.
- What is the temperature range for the ADM1073ARUZ-REEL7? The temperature range is from −40°C to +85°C.
- How is the PWM duty cycle adjusted? The PWM duty cycle can be adjusted using resistors between the TIMER pin and VEE or VIN.
