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CAT4240 Datasheet(PDF) 4 Page - Catalyst Semiconductor |
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CAT4240 Datasheet(HTML) 4 Page - Catalyst Semiconductor |
4 / 14 page CAT4240 Doc. No. MD-5026 Rev. C 4 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice TYPICAL CHARACTERISTICS VIN = 5V, VL = 13V, TAMB = 25ºC, typical application circuit unless otherwise specified. LED Current vs. Input Voltage 100 150 200 250 300 350 8 9 10 11 12 13 14 15 16 INDUCTOR VOLTAGE [V] RSET = 1Ω VOUT = 19.5V RSET = 2Ω VOUT = 18.8V LED Current Regulation -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 8 9 10 11 12 13 14 15 16 INDUCTOR VOLTAGE [V] 6 LEDs @ 150mA Efficiency vs. Load Current (6 LEDs) 80 85 90 95 100 50 100 150 200 250 300 LED CURRENT [mA] Efficiency vs. Inductor Voltage (6 LEDs) 80 85 90 95 100 8 9 10 11 12 13 14 15 16 INDUCTOR VOLTAGE [V] Power-up with 6 LEDs at 300mA Switching Waveform |
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