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CAT4237 Datasheet(PDF) 6 Page - Catalyst Semiconductor |
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CAT4237 Datasheet(HTML) 6 Page - Catalyst Semiconductor |
6 / 14 page CAT4237 Doc. No. MD-5013, Rev. B 6 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice TYPICAL CHARACTERISTICS VIN = 3.6V, CIN = 4.7μF, COUT = 0.22µF, L = 33µH with 8 LEDs at 20mA, TAMB = 25ºC, unless otherwise specified. LED Current vs. Input Voltage (8 LEDS) 0 5 10 15 20 25 30 35 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE [V] RFB = 10Ω RFB = 15Ω RFB = 20Ω LED Current Regulation (20mA) -1.0% -0.5% 0.0% 0.5% 1.0% 3.0 3.3 3.6 3.9 4.2 4.5 4.8 INPUT VOLTAGE [V] 8 LED Efficiency vs. Load Current 65 70 75 80 85 90 5 1015 2025 30 LED CURRENT [mA] VIN = 3.6V VIN = 4.2V 8 LEDs VOUT ~ 27V at 20mA L = 33uH 8 LED Efficiency vs. Input Voltage 65 70 75 80 85 90 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE [V] 15mA 20mA 8 LEDs VOUT ~ 27V at 20mA L = 33uH 7 LED Efficiency vs. Load Current 65 70 75 80 85 90 5 1015 2025 30 LED CURRENT [mA] VIN = 3.6V VIN = 4.2V 7 LEDs VOUT ~ 23V at 20mA L = 33uH 6 LED Efficiency vs. Load Current 65 70 75 80 85 90 5 1015 2025 30 LED CURRENT [mA] VIN = 3.6V VIN = 4.2V 6 LEDs VOUT ~ 20V at 20mA L = 33uH |
Similar Part No. - CAT4237_08 |
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Similar Description - CAT4237_08 |
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