(Hong Kong)
Product Summary
The LT1950IGN#TR is a wide input range, forward, boost, flyback and SEPIC controller that drives an N-channel power MOSFET with few external components required. The LT1950IGN#TR operating frequency can be set with an external resistor over a 100kHz to 500kHz range and a SYNC pin allows the part to be synchronized to an external clock. The LT1950IGN#TR is available in a small 16-Pin SSOP package.Applications of the LT1950IGN#TR include: Telecom Power Supplies, Automotive Power Supplies, Portable Electronic Equipment and Isolated and Nonisolated DC/DC Converters.
Parametrics
LT1950IGN#TR absolute maximum ratings: (1) BOOST: -0.3V to 35V; (2) Vin, Vin2, SHDN: -0.3V to 25V;(3) FB, SYNC, Vsec: -0.3V to 3.5V; (4) COMP, BLANK: -0.3V to 2.5V; (5) SLOPE: -0.3V to 2.5V;(6) Isense:-0.3V to 1V; (7) Rosc: -50μA; (8) Vref: -10mA; (9) Operating Junction Temperature Range: LT1950EGN/LT1950IGN (Notes 2, 5) : -40°C to 125°C; (9)Storage Temperature Range: -65°C to 150°C; (10) Lead Temperature (Soldering, 10 sec) : 300°C .
Features
LT1950IGN#TR features: (1) Wide Input Range: 3V to 25V ; (2) Programmable Volt-Second Clamp; (3) Output Power Levels from 25W to 500W; (4) Auxiliary Boost Converter Provides 10V Gate Drive from Vin as Low as 3V; (5)Programmable Operating Frequency (100kHz to 500kHz) with One External Resistor) ; (6) Programmable Slope Compensation; (7) Programmable Leading Edge Blanking; (8) 2% Internal 1.23V Reference; (9) Accurate Shutdown Pin Threshold with Programmable Hysteresis; (10) 60ns Current Sense Delay; (11) 2.5V Auxiliary Reference Output; (13)Synchronizable to an External Clock up to 1.5 fOSC; (14) Current Mode Control ; (15) Small 16-Pin SSOP Package .
Diagrams
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 LT1950IGN#TR |
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IC REG CTRLR PWM CM 16-SSOP |
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LT1950IGN#TRPBF |
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IC REG CTRLR PWM CM 16-SSOP |
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