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SP6686ER-L/TR Datasheet(PDF) 4 Page - Exar Corporation

Part # SP6686ER-L/TR
Description  400mA Buck/Boost Charge Pump LED Driver
PDF  12 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

SP6686ER-L/TR Datasheet(HTML) 4 Page - Exar Corporation

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S
SP
P6
66
68
86
6
4
40
00
0m
mA
A B
Bu
ucck
k/
/B
Bo
oo
os
stt C
Ch
ha
arrg
ge
e P
Pu
um
mp
p L
LE
ED
D D
Drriiv
ve
err
© 2009 Exar Corporation
4/12
Rev. 2.0.0
PIN DESCRIPTION
Name
Pin Number
Description
VIN
1
Input voltage for the charge pump. Decouple with 2.2µF ceramic capacitor close to the
pins of the IC.
C1
2
Positive input for the external fly capacitor. Connect a ceramic 0.47µF capacitor close to
the pins of the IC.
C2
3
Negative input for the external fly capacitor. Connect a ceramic 0.47µF capacitor close
to the pins of the IC.
FLASH
4
Logic input to toggle between FLASH and TORCH mode. In TORCH Mode FB is regulated
to the internal 50mV reference. In FLASH Mode FB reference voltage can be adjusted by
changing the resistor from RSET pin to ground. Choose the external current sense
Resistor (RSENSE) based on desired current in TORCH Mode.
EN
5
Shutdown control input. Connect to VIN for normal operation, connect to ground for
shutdown.
RSET
6
Connect a resistor from this pin to ground. When in FLASH Mode (FLASH = High) this
resistor sets the current regulation point according to the following:
VFB = (1.26V/RSET)*11.2KΩ
FB
7
Feedback input for the current control loop. Connect directly to the current sense
resistor.
SGND
8
Internal ground pin. Control circuitry returns current to this pin.
PGND
9
Power ground pin. Fly capacitor current returns through this pin.
VOUT
10
Charge Pump Output Voltage. Decouple with an external capacitor. At least 1µF is
recommended. Higher capacitor values reduce output ripple.
ORDERING INFORMATION
Part Number
Temperature
Range
Marking
Package
Packing
Quantity
Note 1
Note 2
SP6686ER-L
-40°C≤TA≤+85°C
SP66
86ER
WWX
DFN-10
Bulk
RoHS Compliant
Halogen Free
SP6686ER-L/TR
-40°C≤TA≤+85°C
SP66
86ER
WWX
DFN-10
3K/Tape & Reel RoHS Compliant
Halogen Free
SP6686EB
SP6686 Evaluation Board
“WW” = Work Week – “X” = Lot Number



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