DC-DC switching controller

8 August 2012 Power Electronics / Power Management

Analog Devices introduced the ADP1853 wide-input-range, synchronous, step-down DC-to-DC controller with voltage tracking and advanced clock synchronisation capability. It can be configured as a voltage-mode controller with input feed-forward or as a current-mode controller, depending on the application and customer preference.

The device has clock-out and synchronisation input to ensure 180-degree phase-shifted synchronisation, eliminating troublesome ‘beat’ frequencies and reducing system input capacitance when multiple devices are used. Its tracking capability enables controlled startup and simple, robust sequencing can be implemented using the precision enable and power-good functions.

The ADP1853 can be connected in parallel to achieve higher current delivery – up to 50 A depending on the external FETs. The IC is designed for high-efficiency, high-current, fast-transient point-of-load applications in a broad range of communications networking, industrial, medical, and consumer applications.

In current-mode control, the ADP1853 architecture detects the current during the off period to improve noise immunity using the on-resistance of the low-side FET, or a series sense resistor for higher accuracy. Externally adjustable slope compensation is added to optimise performance in current mode.

With minor adjustments to external resistor settings, the device can be configured for voltage-mode control, using input-line feed-forward for excellent line rejection. It has a selectable pulse-skip mode to increase efficiency during light load operation. The device also has an accurate current limit, which allows optimal sizing selection of external components.

Further reading:

ABB’s Mission to Zero drives South Africa’s energy transition
ABB Electrification Products Power Electronics / Power Management
ABB Electrification is charting a bold path towards a net-zero future with its Mission to Zero programme, a blueprint that combines energy efficiency, electrification, and digital innovation to accelerate the transition to clean energy.

Read more...

---

Energy harvesting using a battery-less IoT system
NuVision Electronics Editor's Choice Power Electronics / Power Management
Energy Harvesting plays an essential role in the foundation of ambient IoT, a new generation of ultra-low power connected devices that operate by drawing energy from their environment instead of relying on traditional batteries.

Read more...

---

Driving power, defining performance
Future Electronics Power Electronics / Power Management
Vishay’s portfolio of inductors, current sense resistors, and MOSFETs provides a comprehensive solution for intelligent power management.

Read more...

---

Battery simulator module simplifies BMS testing
Test Dynamics Power Electronics / Power Management
The PXI/PXIe solution from Pickering Interfaces offers a scalable, modular design for faster development cycles, lower total cost of ownership, and improved safety.

Read more...

---

DC PSU: The cornerstone for efficient solar-storage systems
Vepac Electronics Power Electronics / Power Management
PV energy storage systems are evolving and DC power supplies, with their technical characteristics that are naturally compatible with new energy, have become a key carrier for improving system energy efficiency.

Read more...

---

Why local manufacturing, maintenance and support are key to the success of South Africa’s energy future
Power Electronics / Power Management
Although new renewable generation capacity is being developed, the current transmission infrastructure may not fully support the connection of these sources to the national grid or adequately deliver power to areas of high demand.

Read more...

---

Converter power modules for 48 V networks
Altron Arrow Power Electronics / Power Management
The economic and quality-of-life benefits of electrification is driving the adoption of HV to 48 V DC-DC conversion across many markets with 48 V power modules becoming more common.

Read more...

---

The importance of power integrity
Spectrum Concepts Power Electronics / Power Management
[Sponsored] Behind every high-speed system lies the need for power integrity. Without it, even the cleanest signal paths become compromised.

Read more...

---

Precise multi-vital sign monitoring
Future Electronics Power Electronics / Power Management
The AS7058 by ams OSRAM is an integrated multi-vital sign monitoring device, which provides a complete photoplethysmogram, electrocardiogram, body impedance sensor, and electrodermal activity sensor.

Read more...

---

Automotive battery diagnostics tester
Comtest Power Electronics / Power Management
Midtronics’ MVT handheld battery tester is a revolutionary tool, powered by MDX-AI, which is set to redefine the standards of battery diagnostics and testing in the automotive industry.

Read more...

---