RT6010 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Dual Channel High Efficiency and High Accuracy Average Current Control LED Backlight Buck Controller

®
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 (T²C) 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.
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.
Features
z Fast Average Current Control T²C (T1/T2 Average
Current Control)
z Dual MOSFET Drives for Asynchronous Buck
Topology
z Provide High Efficiency > 95% and High Accuracy
±3% Channel to Channel Variation
z Provide LED w/o Binning
z Programmable PWM Constant Off Time
z Support both PWM and Analog Dimming
z PWM Dimming Duty Down to 1%
z OVP for Bar Short with V_IN
z UVP for Bar Open/Short to GND with
programmable Fault Delay
z Support SPD (Smart Phase Shift Dimming) for
Multiple Channel Dimming Solution
z V_IN POR Detection with EN Pin to Prevent
Malfunction
z SOP-16 Package
z RoHS Compliant and Halogen Free
Applications
z LCD TV, MNT Display Backlight
z DC/DC or ACDC LEDDriver Application
z General Purpose Constant Current Source
z LED Signage and Display
z Architectural and Decorative LED Lighting
z LED Street Lighting
Pin Configurations
(TOP VIEW)
VCC
DIM/PWM_IN 2
RT
3
D_OSC 4
F_DELAY 5
FAULT 6
NC
7
DPS 8
16
VSS
15 PWM_OUT
14 RT_OUT
13
EN
12
CS2
11 GATE2
10 GATE1
9 CS1
SOP-16
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS6010-00 March 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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