Three Terminal Current Controller

XR

46084 Product Brief

1/2

FEATURES

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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

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Chip

88V input sustaining voltage

< 3V dropout voltage for up to 150mA

regulating current

APPLICATIONS

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LED Lighting Applications

Downlight

High bay

Specialty

Architectural

Description

The XR46084 is a Three Terminal Current Controller (TTCC) for

regulating the current flowing through an LED string.

The application of the XR46084 is configured in parallel with an LED

string. The XR46084 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 XR46084 can provide an excellent LED lighting solution.

Typical Application

+

120VAC

BD

R5

LEDS1

LEDS2

LEDS3

U1

XR46084-ADJ

U2

XR46084-ADJ

U3

XR46084-ADJ

ZD

Q1

XR46000

R4

ILED

U0

XR46084-ADJ

R3

R2

R1

R0

Figure 1. Typical Application

Figure 2. Typical Performance

Rectified

t

t