FAN5645 Datasheet, PDF (8/10 Pages) Fairchild Semiconductor – Indicator LED Blinker with Single-Wire Interface

Typical Performance Characteristics
Unless otherwise noted, VIN = VEN = 3.6V, TA = 25°C, white LED with Vf = 3.3V at ILED = 20mA.
20.20
V_f=2.1V
20.15
-40°C
20.10
20.05
20.00
19.95
+25°C
19.90
19.85
+85°C
19.80
2.5
3.0
3.5
4.0
4.5
5.0
5.5
V_IN(V)
Figure 9. Line Regulation
25
20
-40°C
15 _+25°C
10
+85°C
5
0
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10
V_IN(V)-V_OUT(V)
Figure 10. LED Current vs. Headroom Voltage
22
20
18
16
14
12
10
8
6
4
2
0
10
100
RSET(k )
1000
Figure 11. LED Current vs. RSET Resistance
430
425 ^-40°C
420
415
410
405
+25°C
400
395
+85°C
390
385
0 2 4 6 8 10 12 14 16 18 20
LED Current (mA)
Figure 12. Current Mirror Ratio vs. Output Current
V_f=2.5V
V_IN=3.7V
V_IN=3.0V
I_LED(AC), 0.1mA/div. on top of 20mA
Horizontal Scale: 20µs/div.
Figure 13. Line Transient Response
V_CTRL=1.2V
I_LED=20mA
V_CTRL=0.4V
I_LED=0mA
Horizontal Scale: 500µs/div.
Figure 14. Active Modes Delay
© 2006 Fairchild Semiconductor Corporation
FAN5645 • Rev. 1.0.0
8
www.fairchildsemi.com