Datasheet CAT4201 (ON Semiconductor) - 5

CAT4201 TYPICAL OPERATION CHARACTERISTICS
(VIN = 13 V, ILED = 300 mA, L = 22 mH, C1 = 4.7 mF, C2 = 10 mF, TAMB = 25°C unless otherwise specified) 100 10 8 VIN = 13 V 95 6 2 LEDs 4 90 TION (%) 2 ARIA 85 0 −2 80 1 LED EFFICIENCY (%) −4 −6 75 LED CURRENT V −8 70 −10 100 150 200 250 300 350 −40 0 40 80 120 LED CURRENT (mA) TEMPERATURE (°C)
Figure 14. Efficiency vs. LED Current Figure 15. LED Current Regulation vs. Temperature
350 350 VF = 3.3 V VF = 3.3 V 300 300 300 mA 300 mA 250 250 200 200 VF = 3.1 V VF = 3.1 V 150 150 150 mA 150 mA 100 100 LED CURRENT (mA) LED CURRENT (mA) 50 50 0 0 0 4 8 12 16 20 24 28 0 4 8 12 16 20 24 28 INPUT VOLTAGE (V) INPUT VOLTAGE (V)
Figure 16. LED Current vs. Input Voltage Figure 17. LED Current vs. Input Voltage (1 LED) (2 LEDs)
SW 5V/div CTRL 5V/div Inductor Current LED 200mA/ Current div 200mA/ div 2 ms/div 40 ms/div
Figure 18. Switching Waveforms Figure 19. CTRL Power−up www.onsemi.com 5