PWM controller and driver designed for POL converters
23 February 2005
Power Electronics / Power Management
A new pulse width modulated (PWM) dual synchronous buck controller with driver IC for point-of-load (POL) buck converters is available from International Rectifier. Typical applications include dual phase ASIC and DDR memory power management circuits and datacom and telecom power supplies requiring multiple outputs.
The IRU3146 features 180° out-of-phase operation. This reduces input and output filter requirements resulting in fewer components. In addition, it is ideal for two-phase single- or dual-output synchronous buck converter applications. In single output two-phase applications, the solution can deliver up to 30 A, says the company. Where two separate voltages are required, it will deliver up to 15 A per output. The output voltage can be configured between 0,8 V and 3,3 V.
While using the IRU3146 in conjunction with two optimised MOSFET pairs (consisting of one IRF7821 in the high-side and one IRF8113 in the low-side of each pair), IR claims the converter reaches up to 90,8% efficiency at 12 Vin, 3,3 Vout at 30 A full load condition.
The IRU3146 offers two independent programmable soft starts, which can provide individual output rise time control and limit the in-rush current during start-up. Independent control over the output voltage rise times is especially important in systems requiring output voltage sequencing for sensitive load requirements.
Over-current protection can be set to either latch or hiccup mode shutdown. Hiccup current limit protection is important for systems that need maximum up-time, and works by automatically restarting the converter once the short condition is removed. In an over-temperature condition, the IC will shut down when the temperature exceeds 140°C. In synchronisation mode, the IRU3146 is capable of accepting an external logic level signal from 200 to 400 kHz which helps the overall system filter design at the input to the POL converters, since all POLs on-board can be synchronised together.
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