Fiche De Données (STEVAL-ILL039V2)Table des matièresTable 1. Device summary11 Application diagram4Figure 1. Electric schematic optimized for 2 LEDs and ILED = 200 mA4Table 2. List of components4Figure 2. Electric schematic optimized for 4 LEDs and ILED = 300 mA5Table 3. List of components52 Absolute maximum ratings6Table 4. Absolute maximum ratings6Table 5. Thermal data63 Pin configuration7Figure 3. Pin connections (top through view)7Table 6. Pin description74 Electrical characteristics8Table 7. Electrical characteristics85 Typical performance characteristics10Figure 4. VFB vs. temperature10Figure 5. Maximum VSENSE vs. temperature10Figure 6. IOUT vs. temperature FB = 0.5 V10Figure 7. IOUT vs. temperature FB = GND10Figure 8. Efficiency vs. input voltage 2 LEDs10Figure 9. Efficiency vs. input voltage 4 LEDs10Figure 10. Startup timing and dimming ILED vs. time, 2 LEDs11Figure 11. Dimming EN/PWM = 200 Hz, 2 LEDs11Figure 12. Startup timing and dimming ILED vs. time, 4 LEDs11Figure 13. Dimming EN/PWM = 200 Hz, 4 LEDs11Figure 14. VCC = 1.5 V; ILED = 200 mA, 2LEDs11Figure 15. VCC = 3.6 V; ILED = 300 mA, 4LEDs116 Block diagram12Figure 16. Block diagram127 Detailed description137.1 Main control loop137.2 Start up13Figure 17. Timing diagram147.3 Over voltage protection (OVP)147.4 Enable/PWM147.5 Dimming158 Application information168.1 LED current programming168.2 Duty cycle168.3 Inductor selection16Figure 18. Timing diagram178.4 Inductor peak current limit188.5 Power MOSFET selection19Figure 19. Current diagram ON state20Figure 20. Current diagram OFF state208.6 Schottky diode selection218.7 Input capacitor218.8 Output capacitor219 Demonstration board22Figure 21. Electrical schematic22Table 8. Bill of material optimized for 2 LEDs and ILED = 200 mA2210 Layout suggestion23Figure 22. Assembly layer23Figure 23. Top layer23Figure 24. Bottom layer2411 Package mechanical data2512 Revision history28Table 9. Document revision history28Taille: 1,2 MoPages: 29Language: EnglishOuvrir le manuel