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RT9269 Datasheet(PDF) 5 Page - Richtek Technology Corporation |
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RT9269 Datasheet(HTML) 5 Page - Richtek Technology Corporation |
5 / 10 page Preliminary RT9269 DS9269-01 March 2003 www.richtek.com 5 Typical Operating Characteristics Efficiency vs. Vin 79 80 81 82 83 84 85 33.5 44.5 55.5 6 VIN(V) 6 LEDs, L = 33 µH IOUT = 20mA IOUT = 15mA Efficiency vs. Input Voltage 79 81 83 85 87 89 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) IOUT = 20 mA IOUT = 15 mA 4 LEDs, L = 47 µH Frequency vs. VDD 0 100 200 300 400 500 600 01 234 5 6 VDD (V) FB = GND, TA = 25°C Efficiency vs. Input Voltage 50 60 70 80 90 100 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage (V) IOUT = 20mA @ VIN > 3.8V IOUT = 15mA @ VIN > 3.6V Refer to Application Circuit Fig. 2 Efficiency vs. Output Current 20 30 40 50 60 70 80 90 100 0.1 1 10 100 Output Current (mA) VIN = 4.2V VIN = 3.6V VIN = 2.7V VFB vs. Ambient Temperature 244 246 248 250 252 254 256 -40 -20 0 2040 6080 Ambient Temperature (°C) |
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