DC-DC switching controllers
17 October 2012
Power Electronics / Power Management
New from Analog Devices is the ADP1851 wide-input-range, synchronous, step-down DC-to-DC controller with voltage tracking and synchronisation capability, to complement the recently introduced ADP1853.
The versatile ADP1851/53 can be configured to work as a voltage-mode controller with input feed-forward or as a current-mode controller, depending on the application and customer preference. The devices are designed for high-efficiency point-of-load applications in a broad range of communications networking, industrial, medical and consumer applications.
The ICs can be connected in parallel to achieve higher current delivery – up to 50 A depending on the external FETs. The ADP1851 features a synchronisation input eliminating troublesome ‘beat’ frequencies and reducing system input capacitance when multiple devices with phase-shifted synchronisation are used.
The ADP1851 also has a tracking capability that enables controlled startup. Simple, robust sequencing can be implemented using the precision enable and power-good functions. The ADP1851 is available in a 16-lead LFCSP (4 x 4 mm) package while the ADP1853 with clock out is available in a 24-lead (4 x4 mm) LFCSP package.
In current-mode control, the ADP1851/53 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 devices can be configured for voltage-mode control for improved noise performance, using input line feed-forward for excellent line rejection. The ADP1851/53 series has a selectable pulse-skip mode to increase efficiency during light load operation.
They also have an accurate current limit, which allows for the sizing selection of external components to optimise valuable PCB space. The ADP1851 and ADP1853 are supported by ADI’s online ADIsimPower tools.
Further reading:
Wine farm turns to solar installation for power
Current Automation
Power Electronics / Power Management
Slanghoek Wine farm opted into a power purchase agreement to lower overall electricity costs and enter a true sustainable future, with a price-competitive edge on lower running costs.
Read more...
Industrial PSU family
Brabek
Power Electronics / Power Management
The RACPRO1 family of PSUs supports a universal DC input voltage range from 430 to 850 V DC, allowing the parts to support renewable energy and microgrid applications.
Read more...
Integrated POL voltage regulators
EBV Electrolink
Power Electronics / Power Management
Infineon’s TDA38807 and TDA38806 are their highest density high-efficiency integrated point-of-load (IPOL) solutions for smart enterprise systems.
Read more...
Hi-Rel quarter-brick converters
Accutronics
Power Electronics / Power Management
Gaia Converter’s quarter-brick series DC-DC power modules provides output power levels ranging from 75 to 250 W in fixed output voltages.
Read more...
1700 V GaN Switcher IC
Future Electronics
Power Electronics / Power Management
Power Integrations has introduced a new member of its InnoMux-2 family of single-stage regulated multi-output offline power supply ICs, the industry’s first 1700 V gallium nitride switch.
Read more...
How ADI battery management solutions empower safer, smarter robots
Altron Arrow
Editor's Choice Power Electronics / Power Management
Choosing an appropriate battery pack and its accompanying battery management system is a critical decision in designing an autonomous mobile robot.
Read more...
Industrial power supply range
RFiber Solutions
Power Electronics / Power Management
SynQor’s ruggedised AC-DC and DC-DC converters and filters are designed for a wide range of industrial applications, including those required to withstand harsh environments.
Read more...
PSUs for industrial applications
Power Electronics / Power Management
RECOM’s REDIIN120/240/480 series of AC-DC converters perfectly corresponds with customer needs by exhibiting high efficiency and low energy consumption at no load.
Read more...
Highest density automotive-grade power modules
Altron Arrow
Power Electronics / Power Management
Vicor has released three automotive-grade power modules for 48 V EV systems, which deliver industry-leading power density.
Read more...
MOSFET for automotive applications
Altron Arrow
Power Electronics / Power Management
Infineon’s OptiMOS 7 100 V is offered in the company’s versatile and robust, high-current SSO8 5 x 6 mm
2 SMD package.
Read more...