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ISL97691 Datasheet(PDF) 8 Page - Renesas Technology Corp |
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ISL97691 Datasheet(HTML) 8 Page - Renesas Technology Corp |
8 / 19 page ISL97691 FN7840 Rev.2.00 Page 8 of 19 Sep 8, 2017 Typical Performance Curves FIGURE 3. EFFICIENCY vs VIN (ICH = 20mA, fDIM = 200Hz, VOUT = 21V, LEDs = 4P7S) FIGURE 4. EFFICIENCY vs PWM DIMMING (VIN = 3.7V, ICH = 20mA, fDIM = 200Hz, VOUT = 21V, LEDs = 4P7S) FIGURE 5. PWM DIMMING LINEARITY (VIN = 3.7V, fDIM = 200Hz, VOUT = 21V, LEDs = 4P7S) FIGURE 6. CHANNEL MATCHING ACCURACY (VIN = 3.7V, ICH = 20mA, VOUT = 21V, LEDs = 4P7S) FIGURE 7. START-UP (100% DIRECT PWM DIMMING, VIN = 3.7V, ICH = 20mA, fDIM = 200Hz, LEDs = 4P7S) FIGURE 8. START-UP (50% DIRECT PWM DIMMING, VIN = 3.7V, ICH = 20mA, fDIM = 200Hz, LEDs = 4P7S) 76 78 80 82 84 86 88 90 92 2.8 3.3 3.8 4.3 4.8 INPUT VOLTAGE (V) 4P5S 4P7S 50 55 60 65 70 75 80 85 90 0 2040 6080 100 PWM DIMMING (%) 4P5S 4P7S 0 2 4 6 8 10 12 14 16 18 20 0 20 406080 100 PWM DIMMING (%) -2.00 -1.50 -1.00 -0.50 0.00 0.50 1.00 1.50 2.00 0 123 45 CHANNEL NO V_LX V_CH V_OUT I_L V_LX V_CH V_OUT I_L |
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