Tuesday, June 11, 2013:
A power converter is an electrical or electro-mechanical device for converting electrical energy from one form to another. One way of classifying power conversion systems is according to whether the input and output are alternating current (AC) or direct current (DC). Power converters are usually required in portable electronic devices such as cellular phones and laptop computers that are supplied with power from batteries primarily, and in critical equipment like commercial and military aircraft, weapons systems, etc.
Here we feature some of the products that were launched in the last six months by the major players of the segment.
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Model: MTE1 series, Brand: Murata PS, Manufacturer: Murata Power Solutions, USA
Launched in April 2013, the MTE1 series of isolated 1W single output DC-DC converters are suitable for a broad range of industrial and automation applications. These units with a high efficiency of up to 88 per cent, offer much better performance across the full load range than competing models currently available, resulting in less waste heat being dissipated.
Key features
- Has a load regulation that is typically 5 per cent better than similar models available in the industry
- Input voltage options include the five most popular nominal input voltages of 3.3, 5, 12, 15, or 24 VDC
- Output voltages include 3.3, 5, 9, 12, or 15 VDC
- Full load capability is provided across the full industrial temperature range of -40°C to +85°C
Contact details: www.murata-ps.com
India distributor: Arrow Electronics Pvt Ltd
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Model: TPS54020 10-A, Brand: TI, Manufacturer: Texas Instruments Incorporated (TI), USA
Launched in April 2013, the TPS54020 10-A is a synchronous step-down DC-DC converter with integrated MOSFETs in a very small 3.5 x 3.5 mm HotRod QFN package.
Key features
- Integrated 8mΩ high-side and 6mΩ low-side MOSFETs provide up to 96 per cent efficiency from 12 V to 1 V
- Selectable 6A, 8A and 10A current limit thresholds allow optimisation for efficiency at a lower output current, while reducing the size of external components
- 180ºC out-of-phase switching reduces input current ripple by up to 50 per cent
- 200KHz to 1.2MHz adjustable switching frequency supports small output inductors and capacitors for further space savings
Contact details: India Product Information Centre, Ph: 91-80-41381665; Toll free: 1800 425 7888, [email protected], www.ti.com
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Model: LT3954, Brand: Linear Technology, Manufacturer: Linear Technology Corporation, USA
Launched in April 2013, the LT3954 is a DC-DC converter designed to operate as a constant-current source and constant-voltage regulator with an internal 5A switch. The device’s internal PWM dimming generator makes it ideal for driving high current LEDs, and it also has features suitable for charging batteries and super-capacitors.
Key features
- The LT3954 uses an internal 5A, 40V N-channel MOSFET and can drive up to eight 650mA white LEDs from a nominal 12V input, delivering in excess of 20 W
- Can deliver efficiencies of over 95 per cent in the boost topology, eliminating the need for external heat sinking
- A frequency adjust pin permits the user to program the frequency between 100 kHz and 1 MHz, optimising efficiency while minimising external component size and cost
Contact details: Ph: 080-4012-4610, www.linear.com
India distributors: Digi Key Corporation and Nu Horizons
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Model: WRB_MT 3W, Brand: Mornsun, Manufacturer: Mornsun Power, China
Launched in April 2013, the WRB_MT 3W is a DC-DC micro power supply, specifically developed for application environments where there is a narrow board space, a wide input voltage range, and where input and output must be isolated.
With its professional design functionalities, it can reduce the failure cost in design processes, save manpower, material and time costs of developing a new micro power supply. This series of DC-DC converters is widely applicable for industrial controls, electric power equipment, instrumentation, as well as civil and other applications.
Key features
- High efficiency of up to 83 per cent
- Wide voltage input range: 2:1
- Operating temperature: -40 to+85° Isolation voltage: 1500 VDC
- Short-circuit protection (self-recovery)
Contact details: Ph: 0086-020-38601850-8610, [email protected], www.mornsun-power.com
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Model: LV5980MC, Brand: ON, Manufacturer: ON Semiconductor Corporation, USA
Launched in February 2013, the LV5980MC is a 3A (ampere) step-down DC-DC converter integrated circuit (IC) that improves conversion efficiency at light loads. In consumer electronics designs, the device is able to reduce energy consumption during the standby mode. The LV5980MC regulates input voltages from 4.5 V to 23 V, down to an output voltage as low as 1.235 V. Combining a low consumption power saving feature, the device shows an operating current of 63 µA, with both pulse-width modulation (PWM) and pulse-frequency modulation (PFM). The device can achieve 80 per cent efficiency at an output current of 2 mA in typical applications.
Key features
- Includes an internally fixed switching frequency of 370 kHz, a high-side MOSFET of 100 mΩ and is able to supply up to 3.0 A of load current
- Has an oscillatory frequency of 370 kHz
- Output voltage adjustable to 1.235 V
- Typical value of light load mode current is 63 µA
Contact details: www.onsemi.com
India distributors: Arrow Electronics, Avnet and Digi-Key Corporation
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Model: DC6M4/5/6 series, Brand: NXP, Manufacturer: NXP Semiconductors, USA
Launched in January 2013, the DC6M4/5/6 series combines the advantages of a high-frequency DC-DC buck converter with high performance and a small package size (1.0 x 1.4 mm). The 6MHz switching frequency allows the use of inductors as small as 470 nH, saving board space. Another key advantage is the ultra-low output voltage ripple performance of only 7 mV (typ).
Key features
- Very small WLCSP6 package for board space reduction
- Input voltage range of 2.3 V-5.5 V
- Available with output currents of 425, 500 and 650 mA
- Low quiescent current in shutdown: 0.2 µA (typ)
- Inrush, short-circuit and temperature protection
Contact details: Ph: 91-080- 40240000, www.nxp.com
India distributors: Arrow Electronics India Pvt Ltd, Avnet India Pvt Ltd and Elektronika Sales Pvt Ltd
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Model: IRUH3301 series, Brand: IR, Manufacturer: International Rectifier, USA
Launched in December 2012, the IRUH3301 series of high current, ultra-low dropout (ULDO) RAD-hard hybrid linear voltage regulators are available in standard microcircuit drawings (SMD) for space applications including satellites and launch vehicles.
The devices, screened at the space level and designed for point-of-load and post DC-DC power conversion, offer a low dropout voltage of only 0.4 V at full 3A load.
Key features
- Features a silicon on insulator (SOI) CMOS regulator IC, latch-up and SEU immunity with an LET of 84 MeV.cm2/mg, as well as an outstanding TID rating of 300 Krad(Si) and ELDRS testing in excess of 100 Krad(Si) with a negligible effect on regulation tolerance
- The devices provide a fast transient response, timed latch-off over-current protection, internal thermal protection, and on/off control via shutdown pin
- Available in two industry standard package styles, a five-pin MO-078AA and an eight-pin flat pack, each with multiple lead bend options
Contact details: Ph: 91 80 4114 2644/2645, www.irf.com
India distributors: Arrow Electronics India Pvt Ltd, Avnet India Pvt Ltd and element14
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Model: AduM series, Brand: Analog Devices, Manufacturer: Analog Devices Inc., USA
Launched in November 2012, the ADuM5010, ADuM6010, ADuM521x and ADuM621x are isolated DC-DC converters, which use ADI’s proprietary isoPower isolated DC-DC converter technology to deliver 150 MW of output power while using less board space than competing module-based solutions. The ADuM521x and ADuM621x also integrate two channels of ADI’s iCoupler data isolation technology to reduce board space by up to 75 per cent compared to optocoupler-based alternatives.
Key features
- The converters provide regulated, isolated power, adjustable between 3.15 V and 5.25 V
- The ADuM5010 and ADuM521x are certified for 2.5kVrms (1-minute) isolation, while the ADuM6010 and ADuM621x are certified for 3.75kVrms (1-minute) isolation with further certification for reinforced insulation per VDE 0884-10
- High-temperature operation: 105ËšC
- High common-mode transient immunity: >25-kV/µs
Contact details: Ph: 91-80-43002000; 1800-419-0108, [email protected], www.analog.com
India distributors: Arrow Electronics India Pvt Ltd and Avnet India Pvt Ltd
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Model: VPT5-2800D, Brand: VPT, Manufacturer: VPT Inc, USA
Launched in November 2012, the VPT5-2800D DC-DC power converter delivers up to 5 W from a small footprint of approximately one square inch, meets several military standards, and features a six-sided metal package.
The converter has been designed to power electronics in unmanned vehicles, ships, armoured ground vehicles, and other rugged systems.
Key features
- Wide input voltage range of 15 to 50 V per MIL-STD-704 and MIL-STD-1275
- High input transient voltage: 80 V for 1 sec per MIL-STD-704A
- Dual outputs of ±5V, ±12V and ±15V
- Full operation over -55°C to +100°C military temperature range
- Magnetic feedback circuit with no opto-isolators
Contact details: www.vptpower.com
India distributor: Spur Microwave Inc
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