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Ultra-Compact AC/DC Converters Come in SIP Packages

15 December 2016

For space-constrained applications in industrial systems, automation equipment and telecom units, CUI has readied a new family of low-power, ultra-compact AC/DC converters. Labeled PBO series, the 3 W- and 5 W-rated AC/DC models come in an open-frame, single inline package (SIP) measuring just 35 × 18 × 11 mm (1.38 × 0.71 × 0.43 inches). However the 3 W models are also available in low-profile, right-angle versions measuring 35 × 18 × 11 mm (1.38 × 0.71 × 0.43 inches), making them suitable for applications where vertical board space is limited.

Ultra-compact open-frame AC/DC converters come in a single inline package. Ultra-compact open-frame AC/DC converters come in a single inline package. Switching between 60 and 100 kHz, typical efficiency for these switched-mode power supplies is up to 80% with a wide input voltage range of 85 to 264 VAC or 70 to 400 VDC for high-voltage DC/DC systems. However, efficiency can drop as low as 63% for single output of 3.3 VDC for 3 W units, and 67% for 5 W converters. Depending on the series, the single-output voltages available include 3.3, 5, 9, 12, 15 and 24 VDC. For some tough environments, the 3 W models offer a wide operating temperature range of -40° to +85° C, while the 5 W models provide a range of -25° to +85° C. Additionally all PBO models are designed to provide an input-to-output isolation of 3,000 VAC. Likewise, maximum ripple and noise for these converters is rated at 150 mVp-p.

The PBO series also meets safety standards as required by UL60950-1/EN 60950-1, and complies with EN55022 Class B limits for conducted and radiated emissions. In addition, the AC/DC converter models offer over-current and short-circuit protections. According to CUI, the PBO-3, PBO-3-B and PBO-5 series are available with prices starting at $5.85 per unit for 500 pieces through distribution.



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