Hot-swap controller with current limiting and soft start
19 May 2004
Power Electronics / Power Management
Residential Estate (Industry)
Products & Solutions
Analog Devices' ADM1073 is a -48 V hot swap controller designed for central office applications. The device uses a number of techniques to protect the external N-channel FET and the supply against inrush currents during board insertion and short circuits in the event of board failure.
Soft start, with adjustable current limit profile, controls the current during FET turn-on, and a programmable current limit determines the maximum current. An adjustable PWM retry scheme limits the FET on-time in the event that the output voltage does not reach the required value in a single on cycle, and the device will shut down the FET after seven consecutive retries. Further safe operating area (SOA) protection is provided by reducing the FET on-time as the voltage drop across the FET increases.
Key features are: precision linear inrush current limiting soft start inrush current limit profiling; precision current limit ON time protects FET; adjustable current limit threshold; adjustable PWM retry scheme and multiple device cascading for charging large capacitive loads; outputs indicate whether load capacitor fully charged and whether supply in or out of limit; shutdown after seven consecutive auto-restarts for FET protection; restart input for user-triggered 5 second shutdown and auto-restart; shunt regulator for operation over wide supply range; supply undervoltage and overvoltage monitoring with adjustable hysteresis is user-programmable.
A 'micro' evaluation board is available.
Further reading:
3-terminal filters for automotive applications
RS South Africa
Power Electronics / Power Management
TDK has expanded its YFF series of 3-terminal filters for automotive applications to include higher voltages up to 35 V and higher capacitances up to 4,7 µF.
Read more...
Simple battery charger ICs for any chemistry
Altron Arrow
Editor's Choice Power Electronics / Power Management
The LTC4162 is a highly integrated, high voltage multi-chemistry synchronous monolithic step-down battery charger and PowerPath manager with onboard telemetry functions and optional maximum power point tracking.
Read more...
Why your PoE budget could make or break your next installation
Power Electronics / Power Management
In South Africa’s often unpredictable networking environments, understanding and planning your PoE budget is essential for system reliability, customer satisfaction, and long-term scalability.
Read more...
Five-minute EV charging a reality
Power Electronics / Power Management
Successfully demonstrated in Beijing recently at the Shanghai auto show, BYD claimed to add 400 km of range in just five minutes of charging.
Read more...
The evolution of power management in electronics
TRX Electronics
Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.
Read more...
Power and precision in a compact package
Conical Technologies
Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.
Read more...
Robust PoE module
CST Electronics
Power Electronics / Power Management
The Ag59800-LPB high power, IEEE 802.3bt compliant, PD module from Silvertel offers typical efficiency of 95% making it an ideal choice for higher power, space-constrained applications.
Read more...
Analyse, automate, and optimise logistics processes
neaMetrics
Surveillance Transport (Industry) Products & Solutions Logistics (Industry)
In today’s rapidly evolving logistics sector, the pressure to improve process efficiency, optimise resource usage, and ensure seamless security is more intense than ever. Smart, proactive surveillance is no longer a luxury — it is a critical operational necessity.
Read more...
Cutting-edge solutions for Africa’s clean energy future
Power Electronics / Power Management
As Africa pushes towards reliable, affordable, and sustainable energy, Sungrow is driving transformation with cutting-edge innovations that enhance grid stability, reduce energy costs, and expand access to clean power.
Read more...
Transformer protection is a critical safeguard for municipal power stability
Power Electronics / Power Management
Transformer protection is not just a technical requirement; it is a vital component in ensuring the resilience and operational integrity of South Africa’s municipal power infrastructure.
Read more...
printer friendly version