EDN Product fEEd

The HiperPLC high-powered, PFC (power-factor-corrected), LLC (resonant converter), power-supply-controller IC integrates a CCM (continuous-conduction-mode) PFC controller, an LLC resonant converter, and 800V half-bridge high-side/low-side driver circuitry in an IC package. The continuous-mode PFC reduces the cost of PFC magnetics by limiting ac flux, eliminating the need for Litz wire in the input choke and reducing ripple current delivered to the PFC bulk capacitor. Suiting use in flat-panel televisions and high-brightness LED streetlights, the IC features a high-efficiency ZVS (zero-voltage-switching) LLC, and off-time PFC control, eliminating ac-input-sensing components. The HiperPLC costs $2 (10,000).

Power Integrations, www.powerint.com

Allowing compensation for device-to-device variation in optoelectronics, the OCV100 automatic-calibration design kit calibrates reflective or interruptive devices. This feature allows designers to compensate for variations from manufacturing differences, temperature changes, power fluctuation, and device aging commonly present in optoelectronic systems. Requiring only an external power supply and the optical device for testing, the kit allows engineers to adapt and calibrate any of the vendor’s sensors to any unique application. Four onboard lights indicate device calibration, inability to calibrate the device, and when the analog output reaches the logical trip point higher than the calibration point or lower than the calibration point. The kit allows you to set the internal phototransistor-load resistance at 2.5-, 9.6-, or 24-kΩ values. ...Read More

Aiming at boost, buck-boost, SEPIC (single-ended-primary-inductance-converter), and high-side buck topologies, the MAX16834 current-mode high-brightness-LED driver integrates a high-side current-sense amplifier, a PWM-dimming MOSFET driver, and robust protection circuitry. The device has 92% input-power-factor correction, requiring no additional PFC controller. This feature, along with thermal-foldback protection, suits the device for MR16 spotlights and similar applications receiving power from ac voltage sources. Available in a thermally enhanced 4×4-mm TQFN-20 package with an exposed paddle, the MAX16834 costs $1.24.

Maxim Integrated Products, www.maxim-ic.com

The AstraLED RGB suits use in a variety of kitchen appliances; communications equipment; medical devices; and automotive and sign applications requiring bright, intense light with low power consumption. The LED provides an ultrabright, full-color output in a ROHS-compliant, 3W, high-power RGB package. Features include an 8-, 25-, and 20-lumen light intensity at currents of 300 (red), 350 (green), and 350 mA (blue), respectively, and a +30 to –85°C operating-temperature range. Measuring 10×16×3.3 mm, the AstralLED RGB costs $4.

Lumex, www.lumex.com

The zero-crossing FOD410 triac-driver optocoupler series eliminates the RC-snubber network when driving a snubberless discrete power triac, reducing the board space and energy required to power the circuitry. The snubberless triac optocoupler withstands high static and commutating dV/dt, protecting against the intense noise of industrial environments. Static dV/dt immunity allows the device to remain in the blocking state in the presence of voltage transients. Commutating dV/dt immunity enables the optocoupler to turn off when the load voltage and current are out of phase with each other. The optocoupler turns on only when the ac voltage is near 0V, and the device features a 10,000V/µsec minimum rating for commutating and static dV/dt. The FOD410 snubberless, zero-crossing, triac-driver optocoupler costs $1.29 (1000).

Fairchild Semiconductor, www.fairchildsemi.com

Aiming at medium-voltage switching applications, the NTB5411N power MOSFET suits dc-motor drives, LED drivers, power supplies, converters, PWM controls, and bridge circuits requiring diode speed and commutating safe operating areas. The single-N-channel 60V MOSFET features a 75A drain current and an 8.5-mΩ on-resistance, reducing power dissipation. Available in ROHS (restriction-of-hazardous-substances)-compliant, lead-free D2PAK packages, the NTB5411N power MOSFETs cost 60 cents.

On Semiconductor, www.onsemi.com

New devices in the vendor’s Gen III TrenchFET power-MOSFET line include two 20V and the two 30V N-channel devices. The units have a 76.6-mΩ-nC on-resistance×gate-charge figure of merit of 4.5V and a 117.6.-mΩ-nC on-resistance×gate-charge figure of merit of 10V. A high-side MOSFET in synchronous-buck converters saves power in notebook computers, VRMs (voltage-regulator modules), servers, and other systems using POL power conversion.The vendor claims a 45% gate-charge reduction using TurboFET technology with a charge-balanced drain structure, enabling lower switching losses and faster switching. The Gen III TrenchFETs are available in PowerPAK 1212-8 and PowerPAK SO-8 packages, and prices start at 32 cents (100,000).

Vishay Intertechnology, www.vishay.com

The TLP3782 and the TLP3783 zero-crossing, triac-output photocouplers provide built-in noise immunity and 800V-peak off-state output voltages. Targeting office equipment, home appliances, solid-state relays, and triac drivers, the device features 5000V-rms isolation voltage. The triac outputs control currents in forward and reverse directions. Providing optical isolation between logic and the ac current enables improved reliability, reduced electromagnetic interference, and circuit protection from current surges. The photocouplers consist of a gallium-arsenide infrared-emitting diode and a zero-crossing turn-on photo triac. The devices have a typical 1500V impulse-noise immunity, suiting applications with higher external noise. The TLP3782 and the LP3783 have 10- and 5-mA trigger LED current, respectively, 30-mA input forward current, and 0.1A rms on-s...Read More

Targeting high-speed interfaces, such as HDMI 1.3 ports, the IP4281CZ10 ESD protection device suits consumer electronics, including televisions, notebook computers, set-top boxes, gaming consoles, and DVD players. The device delivers 8-kV of contact ESD protection, in accordance with IEC6100-4-2 standard Level 4 certification. An additional feature ensures that all pads are matched to 0.5-mm traced high-speed lines, such as TMDS (HDMI) and ML (DisplayPort). Available in a 1×2.5×0.5-mm ultrathin leadless package, the IP4281CZ10 costs 29 cents.

NXP Semiconductors, www.nxp.com

The ESD0402-01FR TVS diode provides contact discharge protection suiting portable consumer electronics at 8-kV levels. Suiting use in a ±5V environment, the back-to-back diodes provide for bidirectional ac signals. The device allows dissipation of ESD strikes at ±8-kV contact discharge, according to the IEC61000-4-2 international standard. Available in a miniature DFN-2 lead package in 0402 case sizes or measuring 1×0.6×0.5 mm, the ESD0402-01FR ESD diode costs 3.5 cents.

OnChip Device, www.onchip.com

In collaboration with LSI Corp—formerly, Agere Systems—the vendor designed the TISP surge protector using thyristor-overvoltage-protection technology. The device meets European ITU-T K.21 enhanced standards, requiring 600V rms, 600Ω, and 1A testing for 1 sec for the basic requirement, introducing significantly increased heating. The surge protector has a reduced protection voltage of 350 to 310V, ensuring that the 1-sec heating-effect test does not push the voltage over 350V. Aiming at modems, the device provides 269 to 310V protection window. The TISP4310T3BJR-S surge protector costs 15 cents (20,000) or 12 cents (50,000).

Bourns, www.bourns.com

Rated to withstand 100A surges typical in telecom Ethernet interfaces, the TClamp2502N 2.5V transient-voltage-suppressor array suits high-speed interfaces in applications with a high threat of lightning strikes. Integrating the vendor’s EPD (enhanced punch-through-diode)-process technology with an advanced low-capacitance clamping architecture, the silicon-based device protects submicron transceivers against GR-1089 level lightning pulses. Available in a 2.6×2.6×0.6-mm SLP package, the TClamp2502N 2.5V 100A protection device costs $1.44 (1000).

Semtech Corp, www.semtech.com

The DS2726 stand-alone lithium-ion protection IC uses integrated cell balancing, suiting power tools, e-bikes, portable household appliances, battery-backup systems, or any applications using a five- to 10-cell lithium-ion battery pack. Features include overvoltage, undervoltage, discharge-current, and short-circuit protection, as well as allowing configuration with no external microcontroller. The IC provides protection by integrating cell balancing with fault-monitoring, high-side p-channel FET drivers. High-side protection allows the host systems to maintain communication with a fuel gauge, even when a fault condition causes the protection FETs to switch off. Available in a 7×7-mm TQFN-32 package, the DS2726 stand-alone protection IC costs $4.58 (1000).

Maxim Integrated Products, www.maxim-ic.com

Targeting lithium-ion/lithium-polymer rechargeable batteries, the S-8209A/B protection-IC series features a high-accuracy voltage-detection circuit and a delay circuit. A transmission function and two types of cell balance function, allowing for the configuration of a protection circuit with series multicell. The ICs provide a 3.9 to 4.4V overcharge-detection voltage at a 5-mV step with a ±25-mV accuracy and a 7-mA maximum low-current consumption. An external capacitor for the output pin enables a settable delay time. Available in SNT-8A and TSSOP-8 packages, the S-8209 protection ICs cost 70 cents (10,000).

Seiko Instruments, www.sii-ic.com

Aiming at filter applications, the X7R and X5R MLCC (multilayer-ceramic-capacitor) series provides an alternative to polarized tantalum and electrolytic capacitors. Packaging for the capacitors ranges from 0402 to 1812 case sizes with 100-pF to 100-µF capacitance values. Prices for the X7R and X5R MLCC series range from 1 cent to $1.

Novacap, www.novacap.com