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XRP7604 Datasheet(PDF) 4 Page - Exar Corporation

Part # XRP7604
Description  1A 29V Non-Sync. Buck High Power LED Driver
Download  13 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRP7604 Datasheet(HTML) 4 Page - Exar Corporation

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background image
X
XR
RP
P7
76
60
04
4
1
1A
A 2
29
9V
V N
No
on
n--S
Sy
yn
nc
c.. B
Bu
uc
ck
k H
Hiig
gh
h P
Po
ow
we
err L
LE
ED
D D
Drriiv
ve
err
© 2009 Exar Corporation
4/13
Rev. 1.0.0
PIN DESCRIPTION
Name
Pin Number
Description
FB
1
Regulator feedback input. A current setting resistor is connected to LED’s cathode and
FB on one side and to ground on the other side. This pin can be also used for dimming
control. By connecting a diode between this pin and a >2V signal the LED can be pulsed
at up to 1kHz
GND
2
Ground pin
VDR
3
Power supply for the internal driver. This voltage is internally regulated to about 5V
below VIN. Place a 0.1uF decoupling capacitor between VDR and Vin as close as
possible to the IC.
PVIN
4,5
Connection to the FET source
SVIN
6
Input power supply for the regulator. Place input decoupling capacitor as close as
possible to this pin. This is the Vin connection for the regulator and is not tied to the
high-side FET.
LX
7
Connect to the output inductor. This is the P-Channel FET Drain
ISET
8
This pin is used as a current limit input for the internal current limit comparator.
Connect to LX through an optional resistor. Internal threshold is pre-set to 350mV
nominal and can be decreased by changing the external resistor based on the following
formula: VTRSHLD = 350mV – 33uA * R
Power PAD
9
Can be connected to inductor LX node for a thermal PAD – see Layout suggestions
section.
ORDERING INFORMATION
Part Number
Temperature
Range
Marking
Package
Packing
Quantity
Note 1
Note 2
XRP7604EDB-F
-40°C≤TJ≤+125°C
XRP7604E
YYWWF
LOT#
HSOICN-8
Exp. PAD
Bulk
RoHS Compliant
Green-Halogen Free
XRP7604EDBTR-F
-40°C≤TJ≤+125°C
XRP7604E
YYWWF
LOT#
HSOICN-8
Exp. PAD
2.5K/Tape & Reel
RoHS Compliant
Green/Halogen Free
XRP7604EVB
XRP7604 Evaluation Board
“YY” = Year – “WW” = Work Week – “F” = Green/Halogen Free designator – “LOT#” = Lot Number


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