®
RT6010
Dual Channel High Efficiency and High Accuracy Average
Current Control LED Backlight Buck Controller
General Description
The RT6010 is a dual channel high accuracy average current
control LED backlight buck controller for 2 LED strings w/
o LED binning. Dual MOSFET drivers are specifically
designed to drive two power N-MOSFETs in an
asynchronous buck converter topology. The controller
provides variable LED current control by adjusting the CS
resistor value for digital and linear dimming. The controller
operates with T1/T2 Average Current Control (T
2
C) topology
to provide high accuracy
±3%.
The controller also provides
high efficiency (higher than 95%) under proper setting
without LED binning. The controller provides V
IN
from 8V
to 450V. It is preferred to operate the controller under a
current ripple of < 30% average current and about 85%
duty to optimize the performance.
The RT6010 can be easily connected in series by master/
slave synchronization for multiple channel, even for more
than 6-CH. The controller provides SPD (Smart Phase Shift
Dimming) that is easily implemented to synchronize master
and slave ICs. The controller provides both analog and
PWM dimming.
The RT6010 automatically detects LED bar open, LED
bar short to V
IN
, and LED bar short to GND to prevent
VOUT from over/under voltage damages. The controller
also outputs fault signal with programmable delay to
previous power stage, such as ACDC controller.
Features
Fast Average Current Control T
2
C (T1/T2 Average
Current Control)
Dual MOSFET Drives for Asynchronous Buck
Topology
Provide High Efficiency > 95% and High Accuracy
±
3% Channel to Channel Variation
Provide LED w/o Binning
Programmable PWM Constant Off Time
Support both PWM and Analog Dimming
PWM Dimming Duty Down to 1%
OVP for Bar Short with V
IN
UVP for Bar Open/Short to GND with
programmable Fault Delay
Support SPD (Smart Phase Shift Dimming) for
Multiple Channel Dimming Solution
V
IN
POR Detection with EN Pin to Prevent
Malfunction
SOP-16 Package
RoHS Compliant and Halogen Free
Applications
LCD TV, MNT Display Backlight
DC/DC or ACDC LED Driver Application
General Purpose Constant Current Source
LED Signage and Display
Architectural and Decorative LED Lighting
LED Street Lighting
Ordering Information
RT6010
Package Type
S :SOP-16
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
VCC
DIM/PWM_IN
RT
D_OSC
F_DELAY
FAULT
NC
DPS
16
2
3
4
5
6
7
8
15
14
13
12
11
10
9
VSS
PWM_OUT
RT_OUT
EN
CS2
GATE2
GATE1
CS1
SOP-16
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6010-00 March 2012
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
