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W-52 Scheda tecnica(PDF) 9 Page - Copal Electronics |
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W-52 Scheda tecnica(HTML) 9 Page - Copal Electronics |
9 / 11 page W-52 9 TYPICAL APPLICATION CIRCUITS (The application diagrams below are shown for the TSOT 23 packages.) Figure 16. Two LEDs with DC Level Dimming Control 2.5 V DC DIMMING CONTROL 15 mA 4 1.50 k 60.40 k 6.8 H 2 3 1 6 5 SW VIN RSET D1 C2 2.2 F C1 4.7 F VIN W-52 LED GND 2.5 V DC DIMMING CONTROL 15 mA 4 1.50 k 60.40 k 6.8 H 2 3 1 6 5 SW VIN RSET D1 C2 1 F C1 4.7 F VIN W-52 LED GND Figure 17. Three LEDs with DC Level Dimming Control 15 mA 4 1.50 k 6.8 H 2 3 1 6 5 SW VIN RSET D1 C2 1 F C1 4.7 F VIN PWM DIMMING CONTROL W-52 LED GND Figure 18. Efficiency Three LEDs LED CURRENT (mA) 20 15 10 5 0 60 65 70 75 80 85 LED CURRENT (mA) Figure 19. Four LEDs with PWM Dimming Control Figure 20. Efficiency Four LEDs SHDN L1 RSET VIN = 4.2 V VIN = 3.0 V 20 15 10 5 0 60 65 70 75 80 85 VIN = 4.2 V VIN = 3.0 V L1 SHDN RSET SHDN RSET L1 |
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