Three Terminal Current Controller
XR46083 Product Brief
1/2
FEATURES
System
All solid state components
No electrolytic capacitor required
Compact size to minimize mechanical
cost
Driver-on-board and chip-on-board
available which minimize process flow
and assembly cost
High PF and low THD performance
High efficiency achieved
Flexible PCB layout style
Wide range of LED forward voltage
selection
Distributed heat to several chips
TRIAC dimmable
Chip
88V input sustaining voltage
< 3V dropout voltage for up to 150mA
regulating current
APPLICATIONS
LED Lighting Applications
Downlight
High bay
Specialty
Architectural
Description
The XR46083 is a Three Terminal Current Controller (TTCC) for
regulating the current flowing through an LED string.
The application of the XR46083 is configured in parallel with an LED
string. The XR46083 can work as voltage controlled current source,
current regulator, or cut-off. It is suitable for the applications adopting
periodical AC voltage source.
The layout is very flexible allowing for PCB designs in any conceivable
shape. Whether high bay, downlights, or unique architectural shapes
the XR46083 can provide an excellent LED lighting solution
Typical Application
+
–
120VAC
BD
R5
LEDS1
LEDS2
LEDS3
CS
NC
A
U1
XR46083-ADJ
MS1
MS2
K
U2
XR46083-ADJ
CS
NC
A
MS1
MS2
K
U3
XR46083-ADJ
CS
NC
A
MS1
MS2
K
ZD
Q1
XR46000
R4
ILED
U0
XR46083-ADJ
CS
NC
A
MS1
MS2
K
R3
R2
R1
R0
Figure 1. Typical Application Figure 2. Typical Performance
ILED
Rectified
VAC
t
t
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XR46083 Product Brief
Exar Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. Exar Corporation conveys
no license under any patent or other right and makes no representation that the circuits are free of patent infringement. While the information in this publication has been
carefully checked, no responsibility, however, is assumed for inaccuracies.
Exar Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected
to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Exar Corporation
receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of
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All other trademarks are the property of their respective owners.
©2016 Exar Corporation
XR46083_PB_100316 2/2
48760 Kato Road
Fremont, CA 94538
USA
Tel.: +1 (510) 668-7000
Fax: +1 (510) 668-7001
Email: LEDtechsupport@exar.com
Ordering Information(1)
Part Number Regulating Current (mA) Operating
Temperature Range Lead-Free Package Packag Method
XR46083EHTR-C1(3) 40
-40°C ≤ TJ ≤ 150°C Yes(2)) TDFN6 2x2 Reel
XR46083EHTR-C2(3) 66
XR46083EHTR-C3(3) 52
XR46083EHTR-D1(3) 80
XR46083EHTR-D2(3) 130
XR46083EHTR-D3(3) 104
XR46083EHTR-ADJ Determined by external
resistor only
XR46083ESFTR-C1(3) 40
-40°C ≤ TJ ≤ 150°C Yes(2) SOT-89-5 Reel
XR46083ESFTR-C2(3) 66
XR46083ESFTR-C3(3) 52
XR46083ESFTR-D1(3) 80
XR46083ESFTR-D2(3) 130
XR46083ESFTR-D3(3) 104
XR46083ESFTR-ADJ Determined by external
resistor only
XR46083ECF-C1(3) 40
-40°C ≤ TJ ≤ 150°C Yes(2) Dice Wafer
XR46083ECF-C2(3) 66
XR46083ECF-C3(3) 52
XR46083ECF-D1(3) 80
XR46083ECF-D2(3) 130
XR46083ECF-D3(3) 104
XR46083ECF-ADJ Determined by
external resistor only
NOTE:
1. Refer to www.exar.com/XR46084 for most up-to-date Ordering Information.
2. Visit www.exar.com for more information.
3. Contact factory for availability.
Please contact LEDtechsupport@exar.com to request a complete datasheet.
