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AS3685A Datasheet(PDF) 7 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Part No. AS3685A
Description  Ultra Small High Efficiency 1000mA Charge Pump
Download  25 Pages
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Maker  TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]
Homepage  http://www.taosinc.com
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AS3685A Datasheet(HTML) 7 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

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AS3685A/AS3685B
Datasheet
www.austriamicrosystems.com/
AS3685
(ptr)
Revision 2.2
6 - 24
6
Typical Operation Characteristics
Figure
2 – Efficiency vs. Battery Voltage (with Lumiled PWF1)
40
50
60
70
80
90
100
2.8
3.2
3.6
4.0
4.4
4.8
5.2
VBAT [V]
ILED=700m
ILED=600m
ILED=500m
ILED=400m
ILED=300m
ILED=200m
ILED=100m
ILED=50m
Figure
3 – Battery Current vs. Battery Voltage (with Lumiled PWF1)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
2.8
3.2
3.6
4.0
4.4
4.8
5.2
VBAT [V]
ILED=700m
ILED=600m
ILED=500m
ILED=400m
ILED=300m
ILED=200m
ILED=100m
ILED=50m
Figure
4 – LED current I(ILED) vs. Battery Voltage (with Lumiled PWF1)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
2.83.23.64.04.44.85.2
VBAT [V]
ILED=700m
ILED=600m
ILED=500m
ILED=400m
ILED=300m
ILED=200m
ILED=100m
ILED=50m
Figure
5 – Linearty of Current Sink
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.0
0.5
1.0
1.5
2.0
2.5
VILED [V]
ILED=700m
ILED=600m
ILED=500m
ILED=400m
ILED=300m
ILED=200m
ILED=100m
ILED=50m
Figure
6 –I(ILED) vs. R(ISET) (Flash and Torch Mode of AS3685A)
0
200
400
600
800
1000
1200
0k
20k
40k
60k
80k
100k
120k
140k
RISET [Ohm]
Flash Mode
Torch Mode
Figure
7 – Startup of AS3685A -- ILED Current
ILED 500mA/div 100µs/div
VBAT=3.3V, ILED=700mA


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