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SP7685EB Datasheet(PDF) 6 Page - Exar Corporation

Part # SP7685EB
Description  1.2A Buck/Boost Charge Pump LED Driver
PDF  13 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

SP7685EB Datasheet(HTML) 6 Page - Exar Corporation

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6
Date: 6/20/06 Rev T
SP7685, 1.2A Buck/BoostCharge Pump LED Driver
© 2006 Sipex Corporation
SP7685 VFB vs RSET
0
50
100
150
200
250
300
350
400
450
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
RSET (KΩ)
Measured
Calculated
SP7685 Output Efficiency
0
10
20
30
40
50
60
70
80
90
100
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Input Voltage (V)
1000mA,Vf=3.31V PWF1
700mA,Vf=3.18V PWF1
700mA,Vf=3.92V AOT
200mA,Torch
SP7685 Output Current
0
100
200
300
400
500
600
700
800
900
1000
1100
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Input Voltage (V)
1000mA,Vf=3.31V PWF1
700mA,Vf=3.24V PWF1
700mA,Vf=3.92V AOT
200mA,Torch Mode
SP7685 Torch Output Current
0
50
100
150
200
250
300
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Input Voltage (V)
-40C
25C
85C
SP7685 700mA Flash output Current
400
450
500
550
600
650
700
750
800
850
900
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Input Voltage (V)
-40C
25C
85C
APPLICATION INFORMATION
VIN =3.6V, Typical Application Circuit, TA = 25°C unless otherwise noted.



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