Switching Power Supplies
Designed for standby mode and green power applications, the expanded Bias Power BPS Series micro-size switching power supply allows designers to easily solve space and efficiency problems. Available in either ½-W or 1-W models, this supply operates with nominal 75% efficiency.
With a no-load power consumption of less than 30 mW, the BPS Series efficiently handles the widest possible load variations. Basic low-power applications for the BPS are also widespread, including powering remote and networked sensors, power-line carrier, relay drivers, test equipment, IR receivers, building automation, audio, video, security, ac power adapters and bias supplies.
Based on its circuit design, the BPS Series eliminates line EMI so that no input filtering is required. This is achieved by isolating the input path for the duration of the conducted noise.
Up to 56% smaller than predecessor Bias models, measuring just 1 in. × ⅞ in. × ½ in., the BPS Series power supplies are priced under $6 in small OEM quantities.
Buffalo Grove, Ill.
Analog Devices has expanded its family of power-supply sequencer and supervisory products with a flexible, accurate device that protects against brownout conditions in communications infrastructure equipment. The ADM1185 quad-voltage monitor and sequencer is designed for systems with multiple power supplies, such as wireless base stations, that require sequencer products to ensure voltage rails are powered up in a controlled manner in order to prevent equipment damage.
By providing both a voltage monitoring and sequencing function for up to four power-supply rails, the ADM1185 actively controls the order in which the rails are powered up and monitors the system to ensure the rails are quickly powered down if a failure occurs.
Housed in a 10-pin MSOP package, the ADM1185 is sampling now with full production scheduled for December 2006. The devices are priced starting at $1.20 per unit in 1000-piece quantities.
Transient Voltage Suppressor
Central Semiconductor has released the CMF5.0A series transient voltage suppressors (TVS) packaged in the SOD-123F surface-mount case. The series includes reverse standoff voltages from 5 V to 170 V, all with a peak power of 200 W. The CMF5.0A series also exhibit very low leakage current, low clamping voltage and fast response time. The SOD-123F (200-W) TVS devices are ideal alternatives to the larger standard SMB (600-W) devices and use 60% less board space.
The SOD-123F, with outline dimensions of 1.8 mm × 2.8 mm × 0.98 mm, is essentially the same size as the SOD-123, but that is where the similarity ends. The SOD-123F has flat leads providing better circuit board contact area and higher power handling capability compared with the SOD-123's gull wing leads. The most notable difference with the SOD-123F is the entirely unique internal construction using a jumper bar to attach the top of the chip to the lead frame.
The CMF5.0A series is available bulk packed or on a 7-in. tape and reel. Prices for the CMF5.0A series start at $0.20 each for 3000 pieces on a 7-in. reel.
RoHS- and WEEE-compliant Coiltronics high current pressed power inductors from Cooper Bussmann Electronic Technologies, a unit of Cooper Bussmann, feature a pressed powder iron core material. An enhanced core coating eliminates rusting and provides high insulation impedance. These low-loss iron cores have an operating frequency range up to 1 MHz.
The HCP Series features low-profile surface-mount inductors with a maximum total temperature operation of up to 125°C (application specific). This series has inductance ranges of 0.2 µH to 0.9 µH (HCP1104-R), 0.47 µH to 2.2 µH (HCP1305-R), and 0.15 µH to 10 µH (HCP0703-R). The current range is 52 A to 3 A (HCP0703-R), 42 A to 22 A (HCP1104-R), and 65 A to 20 A (HCP1305-R).
The design is also easier for pick-and-place machines to recognize and properly orient the parts, which are more easily detected by vision systems. The configuration is also a stronger mechanical package. Parts are available in tape and reel packaging, in 400, 950 or 1500 parts per reel depending on the model number.
Cooper Bussmann Electronic Technologies
Boca Raton, Fla.
EnerSys has added a model to its line of Genesis NP batteries. The new 5-Ah, 6-V Genesis NP5-6 battery is commonly used for emergency lighting and other float applications. The rugged construction of the Genesis NP5-6 battery guarantees leakproof operation and allows it to be installed in any position without affecting its capacity or service life.
The battery is maintenance free and does not require the addition of water. Its built-in design controls gas generation and induces the recombination of more than 99% of the gases generated during float usage for safe, efficient operation. Additionally, all Genesis NP batteries are equipped with safety release valves to ensure excess gasses never accumulate within the battery.
Genesis NP batteries can realize over 1000 discharge/recharge cycles depending on the average depth of discharge, and have a typical expected float service life from three to five years.
With a nominal capacity at the 20-hour rate of 5 Ah, the NP5-6 measures 2.76 in. × 1.85 in. × 4.21 in. It weighs 2.05 lbs. and can be operated over a broad range of ambient temperatures. Pricing for the Genesis NP5-6 battery starts at $9.82 each.
Low On-Resistance MOSFETs
Fairchild Semiconductor has developed a family of low on-resistance 600-V MOSFETs, which it calls SuperFETs. These MOSFETs specifically address the DPAK (TO-252) device requirements of the latest ultra-slim, low-profile ballast applications. To minimize switching and conduction losses and meet system efficiency needs of these fast-switching lighting designs, the DPAK SuperFETs offer as little as one-third the on-resistance (0.6 Ω to 1.2 Ω) of traditional planar MOSFETs.
Typically, as the breakdown voltage of a standard MOSFET rises, its on-resistance also goes up exponentially and leads to increased die size. Fairchild's SuperFET technology changes this on-resistance to die size relationship from an exponential to a linear one.
SuperFET MOSFETs are available in a lead-free DPAK package. The FCD7N60 SuperFET (maximum on-resistance equals 0.6 Ω) is priced at $1.54 each; the FCD5N60 (maximum on-resistance equals 0.95 Ω) costs $1.26 each; and the FCD4N60 (maximum on-resistance equals 1.2 Ω) costs $1.14 each.
South Portland, Maine
International Rectifier now offers a series of next-generation 500-V and 600-V high-voltage integrated circuits (HVIC). These 19 HVICs' half-bridge and high- and low-side drivers are offered with single or dual inputs, undervoltage lockout protection, fixed or programmable deadtime for half-bridge drivers, and drive currents up to 2.5 A.
The ICs use an advanced high-voltage IC process, G5 HVIC, which enables a host of innovative features and enhancements. A next-generation high-voltage level-shifting and termination technology delivers superior electrical overstress protection and higher field reliability.
The G5 HVICs benefit from improvements in reliability due to silicon technology and packaging enhancements. The advanced packaging equipment and materials, for example, combined with advancements in mold-compound injection techniques, allow these devices to be less sensitive to moisture and provide improvements in the plastic-to-die interface, an important consideration as peak soldering temperatures have increased with lead-free soldering materials.
The surface-mount SO-8 packages are qualified to moisture sensitivity level (MSL) 2, while all other surface-mount packages are MSL 3 qualified. Pricing for the G5 HVICs starts at $1 each in quantities of 10,000.
El Segundo, Calif.
The Cm3 connector for small and medium servomotors from ITT, Electronic Components has simplified internal wiring and replaces two bulkier conventional circular connectors, reducing mating to servomotors to four steps. The Cm3 connector has a low profile that is ideal for space-sensitive applications, significantly lower installation cost, and is 50% smaller and lighter than conventional circular connector designs.
The Cm3 connector is completely sealed and shielded for high reliability, and its simple harnessing reduces assembly and installation time in motor applications. Designed for motors with a flange size of 100 mm × 100 mm or less, the connectors provide a high degree of vibration and shock resistance.
Pricing for the Cm3 connector is typically $10 to $15 per unit in quantities of 10,000 or more.
ITT, Electronic Components
Santa Ana, Calif.