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:
High-precision current transducer
Power Electronics / Power Management
Danisense announces its new high-precision DP12IP current transducer designed for isolated DC and AC current measurement in demanding PCB-mounted power electronics applications.
Read more...
Secure holder for protected 18650 batteries
Power Electronics / Power Management
Designed for protected 18650 batteries up to 70 mm long, the holder offers secure retention for portable, industrial, and embedded applications.
Read more...
More room to scale
Altron Arrow
Power Electronics / Power Management
With the latest STM32H5 lines from STMicroelectronics, you can now scale within the same platform, from a compact 1 Mbyte device to higher-memory MCUs for graphics-rich and feature-heavy designs.
Read more...
Surface mount power amplifier for high-power applications
RF Design
Power Electronics / Power Management
The GNA-63-5W+, from Mini-Circuits, is a GaN MMIC Power Amplifier (PA) designed for demanding RF applications requiring high efficiency, excellent linearity, and a compact footprint.
Read more...
1200 V QSiC modules
Power Electronics / Power Management
SemiQ Inc has launched the QSiC Dual3, a family of 1200 V half-bridge MOSFET modules for motor drives in data centre cooling systems, grid converters in energy storage systems, and industrial drivers.
Read more...
MCOTS transient filter for military applications
RFiber Solutions
Power Electronics / Power Management
SynQor has announced the new MCOTS-F-28-T-HE transient half-brick filter, the latest addition to its MCOTS product family.
Read more...
Expanded range of high-thermal-performance QSiC modules
Power Electronics / Power Management
SemiQ’s half-bridge series for data centre power converters and industrial motor drives features low RDSON SiC MOSFETs and parallel SBD diodes for best-in-class power density and conversion efficiency.
Read more...
Transporting lithium batteries and IoT devices
Power Electronics / Power Management
With billions of rechargeable and non-rechargeable lithium cells and batteries powering most of the world’s consumer and industrial electronic devices, shipping them to customers through vast global logistics chains is often an overlooked topic.
Read more...
Setting a new benchmark for high-power DC load testing
Conical Technologies
Test & Measurement Power Electronics / Power Management
The new ITECH IT8900G/L high-speed, high-power DC electronic load offers a powerful combination of speed, scalability, precision and high-power density.
Read more...
Quality batteries are critical for IIoT
Uniross Batteries
Power Electronics / Power Management
Batteries intended for use in industrial operations must indeed offer complete reliability under extreme environmental conditions, resistance to vibration and harsh environments.
Read more...
printer friendly version