AAT1500-Q6-T AAT [Advanced Analog Technology, Inc.], AAT1500-Q6-T Datasheet - Page 5

• Manufacturer Part Number: AAT1500-Q6-T
• Description: CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS
• Manufacturer: AAT [Advanced Analog Technology, Inc.]

TYPICAL OPERATING CHARACTERISTICS
94%
92%
90%
88%
86%
84%
82%
80%
78%
76%
10 F
22.5
21.5
20.5
19.5
C2
22
21
20
2.5
12.4
2.5
LED
LED
LED
D3
D4
R1
D2
Typical Application
3.0
D1
LED Current vs. V
3
Advanced Analog Technology, Inc.
Efficiency vs. V
3.5
1-LED
3.5
V
V
1
2
3
IN
IN
AAT1500
GND
(V)
SW
IE
L1 4.7 H
4.0
(V)
4
VDD
OVP
EN
4.5
4.5
6
5
4
–
IN
–
Advanced Analog Technology, Inc . –
IN
2-LED
3-LED
4-LED
5
5.0
台 灣 類 比 科 技 股 份 有 限 公 司
2.6V~5.5V
5.5
VIN :
5.5
Version 1.00
Page 5 of 14
10 F
C1
92%
90%
88%
86%
84%
82%
80%
78%
76%
95%
90%
85%
80%
75%
70%
65%
60%
21.5
20.5
19.5
18.5
22
21
20
19
0
2-LED
–
1-LED
3
Efficiency vs. LED Current
3.5
4
5
Efficiency vs. V
LED Current vs. V
LED Current (mA)
5
10
6.5
6
V
V
O
O
15
7
(V)
(V)
9.5
4-LED
8
20
O
9
O
AAT1500
10
25
12.5
3-LED
11
July 2008
30