CAT4201

http://onsemi.com

6

TYPICAL OPERATION CHARACTERISTICS

Figure 20. RSET Transient Response

Figure 21. Line Transient Response

(10 V to 13 V)

External Component Selection

Table 4 provides the recommended external components L and C2 that offer the best performance relative to the LED current

accuracy, LED ripple current, switching frequency and component size.

Table 4. EXTERNAL COMPONENT SELECTION

1 LED

2 LEDs

LED Current (mA)

L Inductor (mH)

C2 Capacitor (mF)

L Inductor (mH)

C2 Capacitor (mF)

≥150

10

2.2

22

4.7

22

4.7

< 150

33

4.7

47

2.2

47

10

NOTE: Larger C2 capacitor values allow to reduce further the LED ripple current if needed.