Hot-swap controller with onboard ADC and I²C

2 November 2005 Power Electronics / Power Management

Linear Technology's LTC4261, a negative high voltage hot-swap controller, features an onboard 10-bit ADC and I²C compatible interface, allowing sophisticated power monitoring by measuring card voltages and currents as well as recording past and present fault conditions.

The LTC4261 complements the LTC4260, a positive 48 V hot-swap controller. Information in the ADC's registers can be queried via the I²C bus and then used to determine if a card is actually using its allocated power, or operating abnormally. An irregular card can be flagged for service even before it fails.

This advanced power monitoring, combined with a wide input voltage range of

-12 V to -100 V and hot-swap capabilities, make the LTC4261 ideally suited for high availability telecom/network equipment, such as AdvancedTCA systems.

The LTC4261 is also designed to turn the supply voltage on and off in a controlled manner. The active current limiting results in a controlled rise in voltage across the card capacitance and protects the backplane supply from voltage drops. The inrush and overcurrent limits, as well as the undervoltage/overvoltage thresholds and hysteresis are independently adjustable. The controller disconnects the load if it remains in current limit beyond the time-out delay and can be configured to latch off or auto-retry following the event.

The LTC4261 is available in 28-lead SSOP and 24-lead 4 x 5 mm QFN packages.

Further reading:

Analysis of switch-mode power supply: inductor violations
Altron Arrow Editor's Choice Power Electronics / Power Management
Common switch-mode power supply (SMPS) design errors are discussed, and their appropriate rectification is specified, with details on complications that arise with the power stage design of DC-DC switching regulators.

Read more...

---

Compact PCB-mount SMPS
RS South Africa Power Electronics / Power Management
Traco Power’s 5W PCB-mount switch mode power supply (SMPS) offers high efficiency, and is well suited for a variety of applications in the automation, electronics, electrical and mechanical industries.

Read more...

---

AC-DC brick PSU
Conical Technologies Power Electronics / Power Management
These PSUs have a typical efficiency of up to 92%, and a power factor value of up to 0,99. They are available in 12, 24, 28, 48 and 54 V output versions.

Read more...

---

5 kW switching PSU range
Conical Technologies Power Electronics / Power Management
Mornsun has released a new switching power supply range, the LMF5000-25Bxx, which has a 5000 W capacity, and features universal AC input configurations.

Read more...

---

Reliable charging range
Current Automation Power Electronics / Power Management
Whether you’re powering essential electronics, keeping emergency equipment operational, or maintaining the performance of critical machinery, the need for dependable charging solutions cannot be overstated.

Read more...

---

Microchip expands its mSiC solutions
EBV Electrolink Power Electronics / Power Management
The highly integrated 3,3 kV XIFM plug-and-play digital gate driver is designed to work out-of-the-box with high-voltage SiC-based power modules to simplify and speed system integration.

Read more...

---

Dual-port USB-C power delivery solution
Altron Arrow Power Electronics / Power Management
Infineon’s CYPD7272-68LQXQ is the tray packing option of the company’s dual-port USB-C power delivery solution and features an integrated dual-port USB-C PD + DC-DC controller.

Read more...

---

Parallel redundancy power module
Conical Technologies Power Electronics / Power Management
The LIR40-40 is a wide input range DC-DC module, with a constant output of 48 V at a nominal output current of up to 40 A.

Read more...

---

Motor protection relay front-end
NewElec Pretoria Power Electronics / Power Management
Newelec’s Motor Protection Relay front-end software isn’t just another tool, it’s a game changer that puts control firmly in your hands.

Read more...

---

High-power three-phase supplies
Current Automation Power Electronics / Power Management
The units from Meanwell can either be supplied with a three-phase three-wire delta input of 196 to 305 V AC, or they can use a three-phase four-wire star connection of 340 to 530 V AC.

Read more...

---