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TNY253 Datasheet(PDF) 1 Page - Power Integrations, Inc. |
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TNY253 Datasheet(HTML) 1 Page - Power Integrations, Inc. |
1 / 18 page ![]() August 2016 Figure 1. Typical Standby Application. ORDER PART NUMBER 85-265 VAC 230 VAC or 115 VAC w/Doubler Product Highlights Lowest Cost, Low Power Switcher Solution • Lower cost than RCC, discrete PWM and other integrat- ed/hybrid solutions • Cost effective replacement for bulky linear adapters • Lowest component count • Simple ON/OFF control – no loop compensation devices • No bias winding – simpler, lower cost transformer • Allows simple RC type EMI filter for up to 2 W from universal input or 4 W from 115 VAC input Extremely Energy Efficient • Consumes only 30/60 mW at 115/230 VAC with no load • Meets Blue Angel, Energy Star, Energy 2000 and 200 mW European cell phone requirements for standby • Saves $1 to $4 per year in energy costs (at $0.12/kWHr) compared to bulky linear adapters • Ideal for cellular phone chargers, standby power supplies for PC, TV and VCR, utility meters, and cordless phones. High Performance at Low Cost • High-voltage powered – ideal for charger applications • Very high loop bandwidth provides excellent transient response and fast turn on with practically no overshoot • Current limit operation rejects line frequency ripple • Glitch free output when input is removed • Built-in current limit and thermal protection • 44 kHz operation (TNY253/4) with snubber clamp reduces EMI and video noise in TVs and VCRs • Operates with optocoupler or bias winding feedback Description The TinySwitch™ family uses a breakthrough design to provide the lowest cost, high efficiency, off-line switcher solution in the 0 to 10 W range. These devices integrate a 700 V power MOSFET, oscillator, high-voltage switched current source, current limit and thermal shutdown circuitry. They start-up and run on power derived from the DRAIN voltage, eliminat- ing the need for a transformer bias winding and the associated circuitry. And yet, they consume only about 80 mW at no load, from 265 VAC input. A simple ON/OFF control scheme also eliminates the need for loop compensation. TNY253P TNY254P TinySwitch Selection Guide PACKAGE DIP-8 DIP-8 SMD-8 SMD-8 TNY253G TNY255P 0-2 W 1-4 W 0-4 W 2-5 W TNY255G DIP-8 TNY254G SMD-8 3.5-6.5 W 4-10 W The TNY253 and TNY254 switch at 44 kHz to minimize EMI and to allow a simple snubber clamp to limit DRAIN spike voltage. At the same time, they allow use of low cost EE16 core transformers to deliver up to 5 W. The TNY253 is identical to TNY254 except for its lower current limit, which reduces output short-circuit current for applications under 2.5 W. TNY255 uses higher switching rate of 130 kHz to deliver up to 10 W from the same low cost EE16 core for applications such as PC standby supply. An EE13 or EF13 core with safety spaced bobbin can be used for applications under 2.5 W. Absence of a bias winding eliminates the need for taping/margins in most applications,whentripleinsulatedwireisusedforthesecondary. This simplifies the transformer construction and reduces cost. PI-2178-022699 Wide-Range High-Voltage DC Input TinySwitch D S EN BP + – + – DC Output Table 1. *Please refer to the Key Application Considerations section for details. Recommended Range for Lowest System Cost* TNY253/254/255 TinySwitch Family Energy Efficient, Low Power Off-line Switchers This product is not recommended for new designs. |
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