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RT6033A

Richtek
Part Number RT6033A
Manufacturer Richtek
Description 4-CH Constant Current LED Driver
Published May 27, 2016
Detailed Description ® RT6033A 4-CH Constant Current LED Driver for Display Backlight General Description The RT6033A is a 4-CH constant cu...
Datasheet PDF File RT6033A PDF File

RT6033A
RT6033A

Overview
® RT6033A 4-CH Constant Current LED Driver for Display Backlight General Description The RT6033A is a 4-CH constant current sink LED drivers with Dynamic Headroom Control (DHC) function.
RT6033A can provide well current matching ability, adjustable VSET to choose the suitable dropout voltage across the MOS / BTJ.
Beside that, DHC will provide the stable VFB dimming, thus voltage ripple is kept as small even during the dimming.
The RT6033A provides four channel constant currents with less than 3% differences in output current value among the 4-CH and ICs respectively.
The constant current is adjustable by each channel external resistor (RISET).
The LED brightness can also be adjusted via the EN/PWM pin with PWM dimming duty from 1% to 100%.
The RT6033A can operate with external components for high current application The DHC function generates feedback signal to DC/DC control loop and regulate the output voltage.
When RT6033A selects the LED string with the highest forward voltage, and then the COMP is defined according to that particular string.
The COMP voltage is then compared with the voltage of VSET to determine the voltage level of VFB, which therefore control the switching of the primary controller.
RT6033A's protection features include Short LED Protection (SLP), Open LED Protection (OLP) and Over Temperature Protection (OTP).
When any channel triggers protection function, LED will be turned off and the FAULT pin will pull low.
The RT6033A is available in SOP-16 package to achieve optimized solution for PCB space.
Simplified Application Circuit VOUT COUT 4 x NLEDs DSL11 DSL14 VCC VSET RSET1 RSET2 CVCC1 FAULT RT6033A VCC FAULT RSLP SLP Q1 ZD2 …… VSET VFB SLP VCC COMP RCOMP COMP CCOMP DC11 D1 DC14 …… COMP1 RFAULT VCC FAULT OUT1 CS1 M11 …… PWM Signal EN/PWM OUT4 …… CS4 GND …… RS11 M14 RS14 Copyright ©2013 Richtek Technology Corporation.
All rights reserved.
DS6033A-02 April 2013 is a registered trademark of Richtek Technology...


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