AAT1500 Datasheet, PDF (5/14 Pages) List of Unclassifed Manufacturers – CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS

Advanced Analog Technology, Inc.
TYPICAL OPERATING CHARACTERISTICS
July 2008
AAT1500
Typical Application
D1
μ L1 4.7 H
D2
LED
D3
LED
μ^{C2 D4}
10 F ^LED
AAT1500
1 ^VDD 6
SW
2
OVP ₅
GND
3 IE EN 4
Ω ^R1
12.4
VIN :
2.6V~5.5V
μ^C1
10 F
94%
92%
90%
88%
86%
84%
82%
80%
78%
76%
2.5
Efficiency vs. V_IN
1-LED
2-LED
3-LED
4-LED
3 3.5 4 4.5 5 5.5
V_IN (V)
Efficiency vs. V_O
92%
90%
88%
86%
84%
82%
80%
78%
76%
3.5
6.5
9.5
12.5
V_O (V)
Efficiency vs. LED Current
95%
90%
1-LED
85%
80%
2-LED
75%
4-LED
3-LED
70%
65%
60%
0
5
10 15 20 25 30
LED Current (mA)
22.5
22
21.5
21
20.5
20
19.5
2.5
LED Current vs. VIN
LED Current vs. VO
22
21.5
21
20.5
20
19.5
19
18.5
3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3 4 5 6 7 8 9 10 11
V_O (V)
– 台灣類比科技股份有限公司 –
– Advanced Analog Technology, Inc. –
Version 1.00
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