AAT1282 Datasheet, PDF (6/22 Pages) Skyworks Solutions Inc. – 2A Driver for High Intensity LED Camera Flash

Typical Characteristics
Boost Converter Efficiency (P_OUT/P_IN)
without SuperCap
(L = 1µH)
100
95
90
85
80
75
274mA
70
200mA
142mA
65
100mA
60
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
DATA SHEET
AAT1282
2A Driver for High Intensity LED Camera Flash
Flash Mode LED Current Matching
vs. Temperature
(I_FLOUTX = 1A/Channel; V_IN = 3.6V; SuperCap [5.5V, 0.55F])
4
3.5
3
2.5
2
1.5
1
0.5
0
-40
-15
10
35
60
85
Temperature (°C)
Flash Mode LED Current vs. Temperature
(I_FLOUTX = 1A/Channel; V_IN = 3.6V; SuperCap [5.5V, 0.55F])
1200
1000
800
600
400
200
0
-40
-15
10
35
60
85
Temperature (°C)
Flash Turn On Characteristic
(I_FLOUTX = 1A/Ch; V_IN = 3.6V; SuperCap [5.5V, 0.55F])
V_OUT
(2V/div) 4V
V_SW
(5V/div) _0V
I_LED = I_FLOUTX
(1A/div) ^0A
V_FLOUTX
(5V/div) ^0V
Time (50ms/div)
Movie Mode LED Current Accuracy
(I_FLOUTX = 100mA/Channel; L = 1µH)
8
6
4
2
0
-2
-4
-6
-8
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Movie Mode LED Current Matching
(I_FLOUTX = 100mA/Channel; L = 1µH)
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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202305C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013