Power Management I Product News
IR introduces automotive qualified dual low-side driver IC for SMPS applications
International Rectifier has introduced the automotive-qualified AUIRB24427S high current dual low-side driver IC for Switched Mode Power Supply (SMPS) applications used in Hybrid Electrical Vehicles (HEV), Electric Vehicles (EV), and high power industrial converters. The device features very high output current in excess of 6A per channel across the full temperature range and is designed to drive large IGBT and MOSFET gates in modules or discrete packages. Due to the device's extremely low output impedance in turn-on and turn-off mode, power losses are also very low, allowing operation in harsh and high temperature environments such as HEV power supply stages as a primary or secondary side driver. Housed in a simple PSOIC-8N package and featuring ultra-low power dissipation, the AUIRB24427S solves the problem of effectively driving large size IGBTs and MOSFETs used in high power SMPS applications and provides a smaller, simpler and more robust solution than existing discrete solutions currently available in the market.
The AUIRB24427S is available in a thermally enhanced PSOIC-8N package that delivers much
TI makes wide VIN power supply design easier with SIMPLE SWITCHER DC/DC regulators
Texas Instruments (TI) has introduced seven SIMPLE SWITCHER regulators that are intended to simplify wide VIN synchronous power supply design and help engineers create energy- efficient, electromagnetic interference (EMI) compliant products.
higher thermal dissipation compared to standard DIL SMD packages enabling operation at a significantly higher ambient temperature. Additionally, the rail-to-rail output stage, using P- Channel MOSFETs in the high-side allows low internal dropout voltage to reduce power dissipation. The AUIRB24427S also features maximum output resistance of 650 mOhm sink and source at 125°C.
International Rectifier |
www.irf.com
700W model added to PFE-SA series of AC- DC power modules
TDK Corporation has introduced a 700W model to the TDK-Lambda PFE-SA series of AC-DC full- brick power modules. Described as a significant upgrade to the popular PFE700S, the PFE700SA comes with a 3% efficiency improvement, providing a convenient AC-DC board mounted solution for applications such as industrial, MIL- COTS, broadcast, datacom and telecom, test & measurement, LED displays and signage. Being a baseplate-cooled product, the PFE700SA is well- suited for building into outdoor applications, as well as equipment requiring water-cooling, hermetic sealing, fanless operation and compact design. Available in a 51V semi-regulated output, the PFE700SA can deliver full power with a baseplate temperature of between -40 and +100°C. Line and load regulation is 50 to 57V and typical efficiency for the PFE700SA is up to 91%. As with all models in the PFE-SA series, which includes the 300W PFE300SA and 500W PFE500SA, the PFE700SA accepts a wide, universal AC input from 85V to 265V at 47-63Hz and features active power factor correction and
Easy-to-use the LM43600/1/2/3 and LM46000/1/2 DC/DC converters feature an input voltage range of up to 60 V for high reliability in rugged systems, and 27 micro amps of standby current that minimises power consumption at light load. Their synchronous power stage architecture reduces radiated emissions for EMC compliance in a variety of industrial, automotive and communications applications. The LM43600, LM43601, LM43602 and LM43603 synchronous regulators support an input voltage range from 3.5 V to 36 V and generate output currents of up to 0.5 A, 1 A, 2 A and 3 A, respectively. The LM46000, LM46001 and LM46002 support an input of 3.5 V to 60 V and output currents of up to 0.5 A, 1 A and 2 A. The converters integrate compensation, control features and MOSFETS to
reduce the bill of material (BOM) by up to seven components. The HTSSOP package is leveraged across the entire family, allowing pin- and footprint-compatibility, as well as scalability. The regulators are fully supported in TI's WEBENCH online design tool, helping designers generate, optimise and simulate a wide VIN design, and then export that design to a CAD program.
Texas Instruments |
www.ti.com
Configurable AS3715 PMICs supports designs for li-ion battery-powered devices
ams AG has introduced the AS3715, a configurable power management IC (PMIC) which enables OEMs to implement power circuits for multiple end products with the same hardware design. The new AS3715 includes all the essential power management building blocks required to provide a power solution for handheld devices powered by lithium-ion batteries, such as action cameras, navigation devices, tablets, media players and gaming consoles. Highly versatile, it offers the capability to
an input to output isolation of 3kV for one minute. The inverter operation good functions provide great flexibility in the diagnostics of the power system. In addition, over voltage, over current and over temperature protections are included.
Coming with a 5-year warranty, the PFE700SA conforms to EN/UL/CSA 60950-1 safety approvals for general purpose applications and carries the CE mark according to the low voltage (LV) and RoHS Directives.
TDK-Lambda |
www.uk.tdk-lambda.com
Current mode, fixed frequency step-up DC/DC converter comes with internal 1A, 65V switch
Linear Technology has announced the LT8580, a current mode, fixed frequency step-up DC/DC converter with an internal 1A, 65V switch. It operates from an input voltage range of 2.55V to 40V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs. The LT8580 can be configured as either a boost, SEPIC or an inverting converter. Its switching frequency can be programmed, via a single resistor or synchronised to an external clock, between 200kHz and 1.5MHz, minimising external component sizes. The combination of a 3mm x 3mm DFN package (or MSOP-8E) and tiny externals ensures a very compact footprint while reducing solution cost. The LT8580's low VCESAT switch, 0.4V at 0.75A, delivers efficiencies of up to 86%. Under- voltage lockout (UVLO) is user adjustable for optimal system performance. A single feedback resistor sets the output voltage, minimising external components. Other features include
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program the start-up configuration, so that the operation of the power system can easily be adapted for different application processors. The programmability of the start-up sequence and of the built-in DC-DC converters' outputs allows design teams to accommodate changes in end- product specifications at any time without re- spinning their board design. The device offers eight GPIOs, a charger circuit supporting a 1.5A output, an I2C interface, three current sinks, an ADC and a watchdog timer. The DC-DC controller controls external power stages, allowing the user to maximize efficiency, simplify PCB routing and distribute power and heat dissipation over a wide board area. It supports configuration as either a single- or dual-
phase controller, which means that the system's efficiency sweet spot can be adapted to the requirements and size constraints of the design. The DC-DC controller can manage an output current of up to 8A. Two of the eight LDOs are low-noise devices well suited to RF modules, image sensors and other noise-sensitive circuits. The AS3715's three high-voltage current sinks,
which are intended for LCD backlighting, provide a programmable current output adjustable in 150µA increments in a range from 0A to 40mA. In addition, PWM input options provide a simple means to implement dynamic luminance scaling. The integrated 5V boost converter can supply power to HDMI interfaces or other 5V peripherals.
Other configuration options include the ability to implement either switched-mode or linear charging, depending on whether the design must be optimised for power efficiency or for space and cost.
Safety features include a customisable JEITA- compliant temperature supervision and voltage/current control circuit.
ams |
www.ams.com New switching regulator goes wired
external synchronisation capability, internal soft- start and thermal shutdown protection. The device is available in a 3mm x 3mm DFN- 8 package and the LT8580EMS8E is offered in a thermally enhanced MSOP-8 package. Industrial temperature (-40°C to 125°C) versions, the LT8580IDD and the LT8580IMS8E are also available, as is high temperature (-40°C to 150°C) versions.
Linear Technology |
www.linear.com Components in Electronics
RECOM is extending the popular R-78 switching regulator family with the introduction of the new R-78W. This wired version of the R-78 is intended for use in applications which utilise few or no printed circuit boards. For example in LED lighting solutions, a constant voltage for a fan can be generated by connecting the switching regulator in parallel with the LED driver. Standard output voltages of 5V, 9V, or 12V with an output current of up to 500mA are available. This module offers not only a wide input voltage range of 6.5V to 32V but is also short-circuit-protected (shut-down with automatic restart). It is safe to use in industry standard operating temperatures with an operating temperature range of -40°C to +85°C. And to further protect this regulator, a protection diode is integrated into the module in order to prevent damage from reverse currents when switching off.
Its compact design (17.5x11.5x8.5mm) means that the R-78W is also suitable for use in portable and battery-operated devices. Due to its high efficiency of up to 96%, no heat sink is
required – saving valuable board space and lowering mounting costs.
RECOM Electronic |
www.recom-electronic.com
www.cieonline.co.uk
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