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:
NVDC power-path control to 1– 6 cell battery systems
iCorp Technologies
Power Electronics / Power Management
SG Micro’s SGM41581 is an I2C-controlled narrow voltage direct charging buck boost charge controller designed to simplify robust power delivery in systems that must seamlessly operate from an adapter input or a battery pack.
Read more...
Precise, adaptive battery health-monitoring
RS South Africa
Power Electronics / Power Management
New fuel gauge solution from Nordic delivers State-of-Health reporting, adaptive battery modelling, and seamless fleet observability via nRF Cloud.
Read more...
Compact 6 A automotive buck converter
Altron Arrow
Power Electronics / Power Management
Delivering up to 6 A of continuous output current, the DCP0606Y from STMicroelectronics enables efficient regulation of low-voltage rails commonly used in modern vehicle electronics and industrial systems.
Read more...
The new role of UPS technology in high-precision automation
Omron Electronics
Power Electronics / Power Management
OMRON’s BU_2SW and BU_2RWL series UPS systems are engineered to offer a robust, online type power architecture designed to safeguard sensitive AC powered systems across a wide range of industries.
Read more...
Rugged railway-grade DC-DC power modules
iCorp Technologies
Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.
Read more...
Four-quadrant regenerative grid simulator
Conical Technologies
Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.
Read more...
90 W PSU with 150% boost capability
Brabek
Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.
Read more...
Standalone USB PD controller
Future Electronics
Power Electronics / Power Management
The STUSB4531 from STMicroelectronics is a standalone USB Power Delivery sink controller designed to streamline the implementation of USB-C power negotiation in sink devices without requiring a full software stack on a host microcontroller.
Read more...
Power module enhances AI data centre power density
Altron Arrow
Power Electronics / Power Management
Microchip’s MCPF1525 power module with PMBus delivers 25 A DC-DC power and is stackable up to 200 A.
Read more...
MIL-Spec DC-DC power converters
Vepac Electronics
Power Electronics / Power Management
PowerGood has introduced a range of 15 W to 600 W military DC-DC power converters engineered for mission critical defence applications.
Read more...
printer friendly version