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ADD5205ACPZ-RL Datasheet(PDF) 8 Page - Analog Devices |
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ADD5205ACPZ-RL Datasheet(HTML) 8 Page - Analog Devices |
8 / 16 page ADD5205 Data Sheet Rev. 0 | Page 8 of 16 TYPICAL PERFORMANCE CHARACTERISTICS 0 10 20 30 40 50 60 70 80 90 100 05 10 INPUT VOLTAGE (V) 15 20 0 5 10 15 20 25 05 10 INPUT VOLTAGE (V) 15 20 Figure 4. Boost Converter Efficiency vs. Input Voltage, ILED = 20 mA, Brightness = 100%, and LEDs = 6 Series × 4 Parallel Figure 7. LED Current vs. Input Voltage (ILED = 22 mA) 0 5 10 15 25 20 30 0 400 800 RSET (kΩ) 1200 1400 200 600 1000 1600 –20 –15 –10 –5 0 5 10 15 20 020 40 PWM INPUT DUTY CYCLE (%) 60 80 100 Figure 8. LED Current Matching vs. PWM Input Duty Cycle Figure 5. LED Current (ILED) vs. RSET VIN = 3.7V BRIGHTNESS = 100% 6 SERIES x 4 PARALLEL A CH3 960mV 1 2 4 3 VOUT (10V/DIV) SHDN (3V/DIV) IL (500mA/DIV) VSW (10V/DIV) 0 20 18 16 14 12 10 8 6 4 2 0 20 40 PWM INPUT DUTY CYCLE (%) 60 80 100 Figure 6. LED Current vs. PWM Input Duty Cycle Figure 9. Start-Up Waveforms (Brightness = 100%) |
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