RT9052 datasheet(8/9 Pages) RICHTEK

Part #	RT9052

Description	Single Channel LED Current Source Controller

PDF	9 Pages

Scroll/Zoom	100%

Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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8 / 9 page

RT9052

DS9052-01 April 2011

www.richtek.com

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0.35

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0.45

100

125

Ambient Temperature (°C)

Layout Consideration

There are three critical layout considerations.

The current setting resistor should be located as close

as possible to the RT9052 to avoid inducing any noise.

The input capacitor have to put at near the IC for improved

performance.

The pass element operating under high power situation

may raise the junction temperature above the package

thermal resistance limit. (copper area can be added to

improve power dissipation.)

Figure 1. Derating Curve for RT9052 Package

Single-Layer PCB

DIM

GND

ISET

VCC

DRI

VCC

CIN

GND

DRI

RISET

VLED

WLED

Place CIN near the

IC for improved

performance

The GND plane

should be connected

to a strong ground

plane for heat sinking

and noise protection.

ISET node copper

area should be

minimized and kept far

away from noise

sources

FAULT

Figure 2. PCB Layout Guide

RT9052 Datasheet(PDF) 8 Page - Richtek Technology Corporation

RT9052 Datasheet(HTML) 8 Page - Richtek Technology Corporation

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