RT8415 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Two-Stage Hysteretic LED Driver

RT8415
Two-Stage Hysteretic LED Driver
General Description
The RT8415 is a two-stage LED driver controller with
the 2^nd stage MOSFET integrated inside. It consists of
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
RT8415
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
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^nd Stage MOSFETs Inside
 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
8
2
7
GND
3
6
9
4
5
LX2
CREG
VCC
ISN
SOP-8 (Exposed Pad)
Simplified Application Circuit
L1
D5
VL
AC 12V
VN
D1
D2
Q1
D3 D4
CS ^R4
R1
OVP
RT8415
VCC
R2
ISN
GATE1 CREG
CS
OVP
VCOMP ^LX2
C1
GND
VCC
COUT
R3 R_SENSE
C2 _BLD
ISN
C5
LED+ _D6
C3
LED-
L2
Copyright © 2016 Richtek Technology Corporation. All rights reserved
DS8415-00 July 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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