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TPS61042 Datasheet(PDF) 6 Page - Texas Instruments |
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TPS61042 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 20 page www.ti.com 70 72 74 76 78 80 82 84 86 88 90 0.1 1 10 100 IO – Output Current – mA 4 LEDs ≈ 13 V, CO = 1 µF VI = 4.2V VI = 3.6V VI = 2.4V 70 72 74 76 78 80 82 84 86 88 1 2 3 4 5 6 4 LEDs ≈ 13 V, CO = 1 µF VI – Input Voltage – V IO = 15 mA VI - Input Voltage - V 0 5 10 15 20 25 30 35 40 45 50 1.8 2.4 3.0 3.6 4.2 4.8 5.4 6.0 TA = 25°C TA = - 40°C TA = 85°C TA - Free-Air Temperature - ° C 240 242 244 246 248 250 252 254 256 258 260 - 40 - 15 10 35 60 85 VCC = 3.7 V TPS61042 SLVS441B — DECEMBER 2002 — REVISED JANUARY 2003 TYPICAL CHARACTERISTICS TABLE OF GRAPHS FIGURE η Efficiency vs LED current Figure 2 vs Input voltage Figure 3 IQ Operating Quiescent Current into VIN vs Input voltage and Temperature Figure 4 V(FB) Feedback voltage vs Temperature Figure 5 I(FB) Feedback current vs Temperature Figure 6 rds(on) Main switch Q1 vs Temperature Figure 7 vs Input voltage Figure 8 LED switch Q2 vs Temperature Figure 9 vs Input voltage Figure 10 ILED Average LED current vs PWM duty cycle on CTRL pin Figure 11 Soft start Figure 12 PFM operation (fixed peak current control) Figure 13 Burst mode operation (fixed peak current Figure 14 control) PWM dimming Figure 15 Efficiency Efficiency vs vs LED Current Input Voltage Figure 2 Figure 3 Operating Quiescent Current into VIN Feedback Voltage vs vs Input Voltage and Temperature Temperature Figure 4 Figure 5 6 |
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