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:

Rugged railway-grade DC-DC power modules
iCorp Technologies Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.

Read more...

---

Centurion raises the bar at HomeSec Expo
Centurion Systems News & Events Access Control & Identity Management Residential Estate (Industry) Smart Home Automation Commercial (Industry)
Centurion Systems unveiled its latest product lines at HomeSec Expo 2026, introducing SMART+, a simpler way for installers and end users to manage their Centurion installations - as well as a few new products.

Read more...

---

Four-quadrant regenerative grid simulator
Conical Technologies Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.

Read more...

---

90 W PSU with 150% boost capability
Brabek Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.

Read more...

---

Standalone USB PD controller
Future Electronics Power Electronics / Power Management
The STUSB4531 from STMicroelectronics is a standalone USB Power Delivery sink controller designed to streamline the implementation of USB-C power negotiation in sink devices without requiring a full software stack on a host microcontroller.

Read more...

---

Power module enhances AI data centre power density
Altron Arrow Power Electronics / Power Management
Microchip’s MCPF1525 power module with PMBus delivers 25 A DC-DC power and is stackable up to 200 A.

Read more...

---

MIL-Spec DC-DC power converters
Vepac Electronics Power Electronics / Power Management
PowerGood has introduced a range of 15 W to 600 W military DC-DC power converters engineered for mission critical defence applications.

Read more...

---

Compact power MOSFET for high current switching
Future Electronics Power Electronics / Power Management
onsemi’s NTMFSC2D6N08X is a high-performance 80 V N-channel power MOSFET engineered for demanding switching and power conversion applications.

Read more...

---

DC link capacitors for demanding applications
RS South Africa Power Electronics / Power Management
TDK Corporation has announced the B3271xP series of DC link film capacitors, offering high thermal robustness for demanding automotive and industrial power electronics.

Read more...

---

N-channel power MOSFETs
TRX Electronics Power Electronics / Power Management
The TSM2N7002 series from Taiwan Semiconductor are logic-level N-channel power MOSFETs designed with low drain-source on-state resistance, reducing conduction losses and improving efficiency in switching applications.

Read more...

---