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TOP227Y

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® TOP221-227 ® TOPSwitch-II Family Three-terminal Off-line PWM Switch Product Highlights • • • • • • • • • • Lowest cost, lowest component count switcher solution Cost competitive with linears above 5W Very low AC/DC losses – up to 90% efficiency Built-in Auto-restart and Current limiting Latching Thermal shutdown for system level protection Implements Flyback, Forward, Boost or Buck topology Works with primary or opto feedback Stable in discontinuous or continuous conduction mode Source connected tab for low EMI Circuit simplicity and Design Tools reduce time to market AC IN D CONTROL TOPSwitch C S PI-1951-091996 Description Figure 1. Typical Flyback Application. The second generation TOPSwitch-II family is more cost effective and provides several enhancements over the first generation TOPSwitch family. The TOPSwitch-II family extends the power range from 100W to 150W for 100/115/230 VAC input and from 50W to 90W for 85-265 VAC universal input. This brings TOPSwitch technology advantages to many new applications, i.e. TV, Monitor, Audio amplifiers, etc. Many significant circuit enhancements that reduce the sensitivity to board layout and line transients now make the design even easier. The standard 8L PDIP package option reduces cost in lower power, high efficiency applications. The internal lead frame of this package uses six of its pins to transfer heat from the chip directly to the board, eliminating the cost of a heat sink. TOPSwitch incorporates all functions necessary for a switched mode control system into a three terminal monolithic IC: power MOSFET, PWM controller, high voltage start up circuit, loop compensation and fault protection circuitry. OUTPUT POWER TABLE TO-220 (Y) Package1 Input 3 Single Voltage PART 100/115/230 VAC ±15% ORDER PMAX4,6 NUMBER PMAX4,6 8L PDIP (P) or 8L SMD (G) Package2 Single Voltage. Input 3 Wide Range Input PART 100/115/230 VAC ±15% 85 to 265 VAC ORDER PMAX5,6 PMAX5,6 NUMBER Wide Range Input 85 to 265 VAC TOP221Y 12 W 7W TOP221P or TOP221G 9W 6W TOP222Y 25 W 15 W TOP222P or TOP222G 15 W 10 W TOP223Y 50 W 30 W TOP223P or TOP223G 25 W 15 W TOP224Y 75 W 45 W TOP224P or TOP224G 30 W 20 W TOP225Y 100 W 60 W TOP226Y 125 W 75 W TOP227Y 150 W 90 W Notes: 1. Package outline: TO-220/3 2. Package Outline: DIP-8 or SMD-8 3. 100/115 VAC with doubler input 4. Assumes appropriate heat sinking to keep the maximum TOPSwitch junction temperature below 100 °C. 5. Soldered to 1 sq. in.( 6.45 cm2), 2 oz. copper clad (610 gm/m2) 6. PMAX is the maximum practical continuous power output level for conditions shown. The continuous power capability in a given application depends on thermal environment, transformer design, efficiency required, minimum specified input voltage, input storage capacitance, etc. 7. Refer to key application considerations section when using TOPSwitch-II in an existing TOPSwitch design. July 2001

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