Power Electronics

New Products

Class 2 Transformers

These Class 2 transformers are suitable for use in appliances, vending applications and HVAC. Standard models are available with capacities of 5 VA, 20 VA and 50 VA, with either 60-Hz or 50/60-Hz ratings. Primary input voltages include 115 V, 115/230 V, and 200/230 V, with either 12 V or 24 V CT outputs. Lead wires are standard — quick disconnect tabs are also available.
Foster Transformer, Cincinnati, Ohio
Circle 301

DC-DC Converter

The KW010/015/020/025 Series of 16th-brick isolated power modules are single-output dc-dc power converters . Delivering up to 25 A of output current, they provide output voltages from 5 Vdc to 1 Vdc and an input voltage range of 36 Vdc to >75 Vdc. They incorporate synchronous rectification and unique packaging techniques to achieve an efficiency of 91% at a 3.3-V full load.
Tyco Electronics Power Systems, Dallas
Circle 302

DC-DC Converters

The PSS Series of dc-dc converters provides double the power of comparabe converters. RoHS-compliant, applications range from factory automation to communications equipment. Comprised of 48 models with power ratings of 1.5 W, 3 W, 6 W and 10 W, each power rating can be supplied with 5-V, 12-V, 24-V and 48-V nominal input voltages, and with 3.3-V, 5-V or 12-V outputs.
Lambda, San Diego, Calif.
Circle 303

Battery Management ICs

The bqTINY III (bq2403x) Series of single-chip, battery charge and power management ICs provides safer, more efficient charging capabilities for single-cell Li-Ion applications. In addition to integrated PowerFETs, high-voltage protection, current sensor, reverse-blocking protection, thermal regulation, high accuracy current and voltage regulation, they offer a dynamic power-path management (DPPM) feature.
Texas Instruments Inc., Dallas
Circle 304

PWM Controllers

ISL6840-ISL6845 single-ended current-mode PWM controllers improve performance of ac-dc and 48-V dc-dc converters used in telecom, datacom and server applications. These high-performance pin-for-pin upgrades for industry-standard products offer performance advantages. The 5-MHz error amplifier bandwidth is five times wider than existing products, enabling fast transient response.
Intersil Corp., Milpitas, Calif.
Circle 305


The WJ115F Series relay has been upgraded to UL 40-A contacts. This compact, lightweight, low-cost relay comes in three versions: PC termination, combination PC and QC for contacts, and QC for both coil and contacts. Load connections may be made on the WJ115F2 and WJ115F3 styles with Q.C. terminals that have recessed wells to accept insulated 0.25-in. female Q.C. terminals.
CIT RELAY & SWITCH, Maple Grove, Minn.
Circle 306


MAX7500/MAX7501/MAX7502 single temperature sensors accurately measure and convert temperature to digital format using an integrated low-noise, sigma-delta analog-to-digital converter. The temperature data can be used to enable an overtemperature alarm, interrupt or shutdown outputs. They communicate via an I2C-compatible, 2-wire serial interface.
Maxim Integrated Products, Sunnyvale, Calif.
Circle 307

Core-Voltage Controllers

The SC450 and SC451 power supply controllers are for use in notebook PCs based on the latest Intel Pentium M processors. Both comply with Intel mobile PC standards aimed at extending battery life, including Intel's Mobile Voltage Positioning requirements. They support processor speed scaling built into Intel's SpeedStep processors. The SC450 controller operates from 3.3 V or 5 V; the SC451 operates from 5 V.
Semtech Corp., Camarillo, Calif.
Circle 308

Power Supplies

The FPS1000-48 1000-W power supplies have a low profile and hot-swap capability, making them suitable for N+1, redundant applications. Offered with an I2C interface, they're rated at 48 V and 21 A, accept input voltages ranging from 85 Vac to 265 Vac and contain active PFC circuitry to meet EN61000-3-2 standards. They meet Class B EMI standards (radiated and conducted) with an earth leakage current of less than 1.1 mA at 265 Vac.
Lambda, San Diego, Calif.
Circle 309

Charge Pumps

The CAT3200-5 and CAT3200 regulated output charge pumps are designed for very low noise operation, implementing a constant switching frequency of 2 MHz that allows the use of small 1-µF ceramic capacitors. Designed to continuously monitor and control the inrush current during power-up, they are for battery-powered applications.
Catalyst Semiconductor Inc., Sunnyvale, Calif.
Circle 310

Medical-Grade Power Supply

PAM250 passive PFC-based, switch-mode power supplies are for 1-U height single-output medical OEM applications. They meet all Class A PFC requirements, and provide greater reliability and higher MTBF by using fewer components.
TAIYO YUDEN (U.S.A.), San Marcos, Calif.
Circle 311

POL Converters

The LSN-16A Series offers nonisolated 0.75-V to 5-V outputs rated at 16 A, and provides wider input-voltage ranges (3 V to 5.5 V or 10 V to 14 V). Models come with a fixed-output voltage or with a user-programmable output. Operating at a fixed frequency of 220 kHz or 300 kHz, they achieve up to 96% efficiency and don't need auxiliary cooling. With output noise as low as 30 mVp-p, they need no external filtering.
Datel, Mansfield, Mass.
Circle 312

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