Automotive grade thick-film chip resistors improve accuracy and stability
Vishay Intertechnology has introduced a new series of automotive grade thick film chip resistors in the compact 2512 case size with high working voltages up to 1415 V. The Vishay Techno CDMA series devices are designed to lower component counts and placement costs for automotive and industrial applications while reducing PCB sizes and providing increased accuracy and stability.
Consisting of two resistors integrated into a single package with a 5 mm creepage distance, the chip dividers released today provide single-component replacements for multiple discrete resistors used in voltage divider applications. The space-saving, AEC-Q200 qualified devices are optimized for voltage monitoring and overvoltage protection in high power DC/DC converters and inverters, on-board chargers, and battery management systems in electric vehicles (EV) and industrial equipment.
The CDMA series offers a wide resistance range from 500 kΩ to 50 MΩ, with maximum standard resistance ratios to 600:1, tolerances down to ± 0.5 %, and TCR tracking as low as ± 10 ppm/°C. RoHS-compliant and halogen-free, the chip dividers feature a 3-sided wraparound termination configuration, with solder-coated nickel barrier terminations standard.
Samples and production quantities of the CDMA series devices are available now, with lead times of 14 weeks.
Vishay Intertechnology also recently introduced three new series of automotive grade surface-mount standard rectifiers — the first in the low profile DFN3820A package with wettable flanks. Providing space-saving, high efficiency solutions for power line polarity protection and rail to rail protection in commercial, industrial, and automotive applications, the 2-A SE20Nx, 3-A SE30Nx, and 4-A SE40Nx are each available with reverse voltages of 200 V, 400 V, and 600 V.
The DFN3820A features a compact 3.8- by 2.0-mm footprint and an extremely low typical height of 0.88-mm. At the same time, the rectifiers feature optimized copper mass design and advanced die placement technology to allow for superior thermal performance that enables operation at higher current ratings.
Compared to devices in the SMP (DO-220AA) package with the same footprint, the AEC-Q101 qualified SE20Nx, SE30Nx, and SE40Nx offer a 12 percent lower profile and double the current rating. In addition, the automotive grade rectifiers offer equivalent or higher current ratings to larger devices in the conventional SMB (DO-214AA) and SMC (DO-214AB) packages, as well as the eSMP® series SlimSMA (DO-221AC), SlimSMAW (DO-221AD), SMPA (DO-2212BC), and SMPC (TO-2778A).
Featuring an oxide planar chip junction design, the rectifiers offer typical reverse leakage current less than 0.1 μA, while their low forward voltage drop down to 0.86 V reduces power losses to improve efficiency. The devices operate over a wide temperature range from -55 °C to +175 °C, and provide ESD capability in compliance with IEC 61000-4-2, air discharge mode. Ideal for automated placement, the rectifiers offer a MSL moisture sensitivity level of 1, per J-STD-020, LF maximum peak of 260 °C. The devices are RoHS-compliant and halogen-free.
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