ZMDI announced its entry into the LED market with the first three energy-efficient LED driver ICs of a new family. The drivers achieve up to 95% efficiency and are designed for internal and external lighting applications.
The ZLED7000 and ZLED7010 drive single or multiple LEDs from a supply voltage range of 6 to 40 V, using continuous-mode inductive step-down converters. The ZLED7001 is a peak current mode control LED driver which operates within a wide input range from 8 V to 450 V d.c. or 110 V/220 V a.c., making it suitable for direct line-powered applications.
The ZLED7000 and ZLED7010 both feature an integrated current-switching transistor and require only four external components for a complete driver; both support wide-range dimming. The ZLED7010 also has integrated LED temperature compensation to maximise LED lifetime. The measured temperature information for the compensation can be cascaded through the ZLED7010 to serve up to 13 LED drivers. Both devices can drive up to 750 mA of LED current, and feature regulation better than 2 mA.
For line-powered applications, the ZLED7001 allows efficient operation of high brightness (HB) LEDs. Direct connection to the power line reduces the cost and size of LED lamps, and makes it possible to create LED lamps which are direct replacements for conventional incandescent and fluorescent lamps. The ZLED7001 delivers excellent dimming response and can be dimmed using either pulse-width modulation techniques or via a linear input control pin. A temperature-compensation input can be used to ensure maximum LED lifetime.
For all three devices, full application kits including application notes and an evaluation board are available now. The ZLED7000 comes in a SOT89-5 package, making it suitable for space-constrained applications such as signage or specialty architectural lighting. The ZLED7001 and ZLED7010 are available in an SOP-8 package.
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