RT8415

Copyright © 2016 Richtek Technology Corporation. All rights reserved

is a registered trademark of Richtek Technology Corporation.

DS8415-00

July

2016

www.richtek.com

1

Two-Stage Hysteretic LED Driver

General Description

The RT8415 is a two-stage LED driver controller with

a Boost controller on the first stage and a Buck

converter on the second stage. By adapting two-stage

topology, RT8415 is highly

compatible with ET

(Electronic Transformer) and performs extremely high

Power Factor in specific MR16 / AR111 LED lighting

applications.

The Boost converter on the first stage provides

constant output voltage with well inductor current

control. The Buck converter on the second stage

provides constant LED output current by hysteretic

peak current regulation.

The RT8415 is available in the SOP-8 (Exposed Pad)

package.

Ordering Information

Package Type

SP : SOP-8 (Exposed Pad-Option 2)

RT8415

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Richtek products are :



RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.



Suitable for use in SnPb or Pb-free soldering processes.

Features



Two-Stage Topology (Boost + Buck)



2



Wide Input Voltage Range : 4.5V to 36V



Excellent Power Factor



Programmable Boost Output Voltage



Independent Dual Stage Function



Programmable LED Current with

6% LED

Current Accuracy



Flicker-Free LED



Wide Electronic Transformer Compatibility



Input Under Voltage Lockout Detection



Thermal Shutdown Protection



SOP-8 (Exposed Pad) Package

Applications



MR16 Lighting



Signage and Decorative LED Lighting



Architectural Lighting



High Power LED Lighting



Low Voltage Industrial Lighting



Indicator and Emergency Lighting



Automotive LED Lighting

Pin Configuration

(TOP VIEW)

GATE1

CS

OVP

VCOMP

LX2

CREG

ISN

VCC

GND

2

3

4

5

6

7

8

9

SOP-8 (Exposed Pad)

Simplified Application Circuit

RT8415

GATE1

OVP

LX2

VL

VN

D1

D2

D3

D4

R2

R1

D5

L1

VCC

D6

L2

C5

ISN

LED+

LED-

GND

C2

VCC

C1

VCOMP

CS

Q1

ISN

R4

AC 12V

CS

BLD

R3

CREG

C3

OVP