FAN5609 Fairchild Semiconductor, FAN5609 Datasheet - Page 8

• Manufacturer Part Number: FAN5609
• Description: LED Driver with Adaptive Charge Pump DC/DC Converter
• Manufacturer: Fairchild Semiconductor

FAN5609
Typical Performance Characteristics
T
8
A
= 25°C, C
20.4
20.2
20.0
19.8
19.6
180
160
140
120
100
80
60
40
20
0.9
0.8
0.7
0.6
0.5
0.4
0
2.5
3.0
2.5
Supply Current vs Input Voltage
IN
3.0
3.0
Efficiency vs Input Voltage
=C
Regulated LED Current vs
3.2
OUT
LED Forward Voltage
LED Forward Voltage (V)
(4 LEDs x 20mA)
3.5
3.5
Input Voltage (V)
= 4.7µF, CAP1 = CAP2 = 0.1µF, using Fairchild’s QTLP670C-IW Super Bright LED.
(4 LEDs)
VIN(V)
4.0
3.4
4.0
A = 1, B = 1
4.5
4.5
A = 1, B = 0
3.6
A = 0, B = 1
5.0
5.0
5.5
5.5
3.8
2.2
2.0
1.8
1.6
1.4
1.2
1.0
25
20
15
10
1.6
1.4
1.2
1.0
0.8
0.6
2.5
5
0
2.5
2.5
Regulated LED Current vs Input Voltage
Shutdown Current vs Input Voltage
3.0
3.0
3.0
DAC Threshold Voltage vs
LED Forward Voltage (V)
3.5
3.5
3.5
Input Voltage
Input Voltage (V)
Input Voltage (V)
4.0
4.0
4.0
PRODUCT SPECIFICATION
A = 0, B = 0
A = 1, B = 1
A = 0, B = 1
A = 1, B = 0
4.5
REV. 1.0.2 5/30/03
4.5
4.5
5.0
5.0
5.0
5.5
5.5
5.5