Power Integrations has added a new family of power conversion ICs to its line: the TinySwitch-III. These new devices (TNY274-TNY280) are capable of delivering up to 36,5 W of continuous power without a heat-sink.
The company expects designers of LCD monitors, DVD players, set-top boxes, PC standby power supplies, battery chargers and adapters will benefit from its design flexibility and a high performance feature set. The TinySwitch-III series is available in DIP-8 through-hole and SMD packages.
These devices contain a number of enhancements that enable greater levels of design flexibility and energy efficiency, as well as a wider range of addressable applications:
* Selectable current limits allow designers to choose one of three current limits for a given TinySwitch-III device without the use of additional IC pins or external components.
* Extended power range addresses universal-input power supplies (85-265 V a.c.) delivering up to 28 W of output power, compared to 15 W for TinySwitch-II.
* Lower no-load power consumption - under 150 mW of no-load power at 265 V a.c. without the use of a bias winding on the transformer.
* On-time extension reduces the size of the bulk capacitor required for low-line power delivery/hold-up time.
To support TinySwitch-III, a Reference Design kit is available that contains a tested 12 W (12 V, 1 A output), universal input power supply using TNY278GN, an Engineering Prototype Report (EPR-91) and product samples.
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