Product Update: dc/dc converters

400-W ¼-brick converter suits telecom use 

The RBQ series of isolated 12-Vout, 400-W dc/dc converters up to 96% efficiency in a standard DOSA-compliant quarter-brick package. The converter series suits telecommunications, enterprise IT and wireless networking infrastructures that use a distributed power or regulated intermediate bus architecture. It is designed to operate in most applications with convection cooling.

 

The RBQ-12/33-D48 dc/dc converter operates from a standard telephone network voltage (TNV) network supply of 36 to 75 Vdc around a nominal 48 Vdc. The converters deliver 33 A/400 W at 60°C with 200-lfm airflow. Protection features include output over voltage, over current protection, input under voltage and over temperature shutdown. Input / Output isolation is provided by 2,250 VDC Basic insulation.

Murata Power Solutions, www.murata-ps.com

Dc/dc converters suit railway applications

The VQB100R and the VHB150R series of board mount dc/dc converters target railway, telecom and battery-powered applications, and help comply with the EN50155 standard. The internally potted and encapsulated design protects against dust, moisture, and shock and vibration.

 

 

The board-mount dc/dc converters are offered in industry standard quarter brick and half-brick footprints. The 100 W VQB100R quarter-brick and the 150 W VHB150R half-brick converters provide 92.5% efficiency. They provide a 3:1 input range from 66 to 160 Vdc and output voltage options of 5, 12, or 24 Vdc. Priced at $119 ea/100, they operate from -40° to 100°C and provide 2,250-Vdc I/O isolation.

CUI Inc., www.cui.com

30-W converter operates from -40° to +85°C

The PMD3 W-T industrial converters are available in a DIL 24 or SMD case with an output power of 3 W. The converters operate from -40° to +85°C and have a high efficiency from 72% to 87 %.

The converters are characterized by a 2:1 input range. with a nominal input voltage of 5 V (4.5 to 9 Vdc), 12 V (9 to 18 Vdc), 24 V (18 to 36 Vdc) and 48 V (36 to 75 Vdc) and single output voltages of 3,3, 5, 12, 15 Vdc or dual outputs of ±5, ±12, or ±15 Vdc. The series is available in 28 different input/output configurations, each in three isolation classes of 500, 1,500 and 3,000 Vdc. They are built in a metal or plastic case. They feature ripple and noise, and continuous short circuit protection.

MTM Power, www.mtm-power.com

Mini 16-A PoL regulator suits industrial needs

The SRL16A-12W PoL switching regulator, available in a miniatureSMT package, targets distributed power architectures forindustrial, networking and telecommunications equipment. Itprovides 16-A output current and operates over an input range from6 to 14 Vdc. The output is adjustable (by the simple addition of anexternal resistor) from 0.75 to 5.0 Vdc. Standard features includeefficiency as high as 95%, 0.5% maximum line/load regulation, andincludes thermal, overload and short circuit protection

 

Multiple PoL regulator units may be sequenced to control the output timing for applications that require power busses to be turned on in a certain order. It is approved to EN 60950 and the MTBF (per MIL HDBK 217F) is 980 khours. The PoL regulator is priced at $28.35 ea/100 and is specified for operation from -40°C to +85°C.

MicroPower Direct , www.micropowerdirect.com

ZVS buck regulators offer I2C interface

The PI33XX Picor Cool-Power zero-voltage switching (ZVS) buck regulator line now has 14 new additions for its point of load dc/dc regulation family. The devices are the only buck regulators in their class to offer an optional I2C extended fault telemetry capability allowing for six distinct types of fault reporting. Additional device-programmable I2C features include output margining, enable pin and synchronization pin logic polarity, and phase delay. Device programming is performed via the Cool-Power development tool.

The members of the ZVS buck regulator family convert 8− to 36−V inputs to point of load system rails such as 3.3, 2.5, 1.8 and 1-V. All products in the PI33XX series are provided with control circuitry, power semiconductors and support components in a 10 x14 x 2.56−mm LGA system in package (SiP). The power delivery can be further increased by interleaving multiple regulators using single wire current sharing without the need for any additional components. The $15.41ea/1,000 devices require only an external inductor and minimal ceramic capacitors for input and output filtering to form a complete high performance regulator. No frequency compensation, parametric settings or incremental external components are required.

Vicor , www.vicorpower.com

Transient suppressor suits mil/aero apps

The LGDS-100-P-K module transient/spike suppressor is rated to sustain transient up to 100 V and 202 V to comply with MIL-STD-1275 and DEF-STAN 61-5 part 6 standards. The device is housed in a 1 x 1.5-in. package.

The transient suppressor handles up to 100-W with no heatsink. It offers flexibility and easy-to-use solution to designers for complex power supply design. It features normal, power-fail, and transient operation. The device provides input undervoltage
lockout, output over current protection and over temperature protection. It clamps input transients up to 202 V for 350 ms and 101 V for 400 ms.

Gaia Converter , www.gaia-converter.c om

Digital converter lowers power consumption

The BMR456 3E dc/dc converter is the first model in the second generation of digital Advanced Bus Converter products. It targets information and communication technology (ICT) applications that require fast response time, tightly regulated intermediate bus voltages and high efficiency at any point of operation, to reduce power consumption. The device is based on the FRIDA II platform and firmware to reduce energy consumption. It delivers a typical efficiency of 96.5%.

 

Priced from $46 ea in large quantities, the regulated digital dc/dc converters are based on a 32-bit ARM microcontroller that embeds the FRIDA II firmware keeping the best performance at any load and handles line transients. Designed to power telecom and datacom applications, the converter handles input voltages from 36 to 75 V, delivering an output power of 420 W and 40 to 60-V inputs, with an output power up to 468 W. Output voltage can be adjusted from 4.0 to 13.2 V via PMBus commands.

Ericsson Power Modules , www.ericsson.com/powermodules

Dc/dc converters shrink footprint 75% 

The ADuM5010, ADuM6010, ADuM521x and ADuM621x are the industry's smallest isolated dc/dc converters. The devices use the proprietary isoPower isolated dc/dc converter technology to deliver 150−mW output power and iCoupler data-isolation technology to reduce board space up to 75% compared to optocoupler-based solutions. Prices for the converters range from $1.54 to $3.36 ea/1,000.

The ADuM521x and ADuM621x integrate two channels of iCoupler data isolation technology. The converters provide regulated, isolated power, adjustable between 3.15 and 5.25 V. The ADuM5010 and ADuM521x are certified for 2.5−kV rms (1 minute) isolation, while the ADuM6010 and ADuM621x are certified for 3.75−kV rms (1 minute) isolation.

 Analog Devices , www.analog.com

Digital dc/dc converter offers 4:1 input

The WDE series 75-W 1/8th brick features 4:1 input range from 9 to 36 and 18 to 75 Vdc. The output voltages are 24, 28 and 48 Vdc. All models offer isolated input to output and are housed in an encapsulated, five sided shielded enclosure. The case dimensions are 2.5 x 1.1 x 0.55-in.

The dc/dc converter series offers remote sense, trim and analog on/off. Efficiency is 90% typ while line and load regulation is 0.2% typ. Output noise is typically 1% of Vout. The switching frequency is 275 kHz.

Calex Mfg., www.calex.com 

Compact LED drivers offer 7 to 60-Vdc input

The LD48 series miniature (miniDIP case), dc/dc LED drivers target power/control high brightness LEDs. Eight models operate from a very wide input voltage range of 7.0 to 60 Vdc and provide constant current outputs of 150, 250, 300, 350, 500, 600, 700, or 1,000 mA. They feature a constant current output up to 1 A, PWM, analog dimming, and efficiency up to 97%.

Standard features include short circuit protection, and a remote on/off input. LED brightness (dimming) may be controlled by an analog voltage input or digitally by a PWM input. The PWM input also can be used as a remote on/off control input. The MTBF (per MIL HDBK 217F) of the LD48 series is greater than 950 khours. .All models, which range in price from $14.70 to $16.25 ea/100, are specified for operation from -40° to +85°C ambient with no derating or heat sinking required.

MicroPower Direct , www.micropowerdirect.com   

1/8th 240-W converter gets 94.5% efficiency

The RBE series of fully isolated dc/dc converters targets 12-Vdc intermediate bus architectures or distributed power-based applications used in servers, wireless base-stations, data storage, telecom switches and networking equipment. The RBE-12/20-D48 model delivers a regulated 12V output at 240W from a nominal 48Vdc input, and an efficiency of 94.5%. It meets the requirements of the Distributed power Open Standards Alliance (DOSA).

 

The standard isolated dc/dc module is a through-hole mounted package, configured as an open frame converter with 4.6-mm pins and negative logic. Protection features include thermal shutdown with auto restart (hiccup), over current/short circuit protection with auto restart, and input under voltage lockout. The converter is fully isolated to 2,250 Vdc.

 Murata Power Solutions, www.murata-ps.com