Low-voltage, switch-mode power; power-factor corrected ac/dc supplies


Recent product introductions include HTK Series of single-output, low-voltage, switch-mode power supplies from HiTek Power and Cotek Electronics 1K5U Series of 1,500 W ac/dc power supplies from Power Sources Unlimited .

Control Components

HTK Series power supplies offer a wide choice of case types, output connectivity, and front panels, with 11 output voltages, 3.3-54 V.

HTK Series power supplies are power-factor corrected, offering a wide choice of case types, output connectivity, and front panels, with a choice of 11 output voltages, 3.3-54 V. HTK300 units offer a maximum output power of 198 W for the 3.3-V variant and 300 W for other variants. HTK400 supplies have a maximum output power of 400 W (except the 3.3-V unit, which has maximum output power of 264 W). They have an input of 90-264 V and a typical active power-factor correction to 0.99. Supplies are available in enclosed, U-channel and open-frame variants, without a front panel or with four options: IEC inlet only, terminal block only, power switch and IEC inlet, or power switch and terminal block. Output connector can be a barrier-type terminal block, Euro-type terminal block, or a Molex-type connector. They have over-current, over-voltage, over-temperature, and short-circuit protection. A single-wire current share feature ensures that with parallel connections, individual units share output current to within

Control Components

Cotek Electronics 1K5U Series 1,500 W ac/dc power supplies from Power Sources Unlimited have a low profile, 8 x 11 x 2.5-in. enclosure.

Cotek Electronics 1K5U Series 1,500 W ac/dc power supplies from Power Sources Unlimited are housed in a compact, low profile 8 x 11 x 2.5-in. enclosure and are ideal for industrial control applications, instrumentation, and communications. They accept a universal 90-260 V ac input and provides high current, single outputs from 12 V dc to 60 V dc. Output voltages are adjustable by potentiometer or by external controls. A 1,200 W product is also available. The power-factor corrected units meet harmonic current standard EN61000-3-2.3 and worldwide safety certification is to EN60950 standards. They are up to 90% efficient and offer such standard features as remote sense, forced current sharing for parallel operation, a power-fail signal, and over-voltage, short-circuit, and over-temperature circuitry.

—Mark T. Hoske, editor-in-chief, Control Engineering,

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