RT6032 – 4-CH Constant Current LED Driver

Part Number : RT6032

Function : 4-CH Constant Current LED Driver

Manufactures : Richtek

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RT6032 image

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Description :

® RT6032 4-CH Constant Current LED Driver for Display Backlight General Description The RT6032 is a 4-CH constant current sink LED drivers with Dynamic Headroom Control (DHC) function. RT6032 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 RT6032 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 RT6032 can operate with external components for high current applications. The DHC function generates feedback signal to DC/DC control loop and regulate the output voltage. When RT6032 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. RT6032’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 RT6032 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 RT6032 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. DS6032-03 April 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT6032 Features z Wide Input Supply Voltage Range : 5V to 24V z Adjustable Channel Current z 3% Current Sense Amplifier Input Offset z VCC Under Voltage Lockout z Thermal Shutdown z Adjustable Dynamic Headroom Control (DHC) Function z LED Open/Short Protection z RoHS Compliant and Halogen Free Applications z LCD TV, MNT Display Backlight z DC/DC or AC/DC LEDDriver Application z General Purpose Constant Current Source z Architectural and Decorative LED Lighting z LED Street Lighting Marking Information RT6032 GSYMDNN RT6032GS : Product Number YMDNN : Date Code Ordering Information RT6032 Package Type S : SOP-16 Note : Lead Plating System G : Green (Halogen Free and Pb Free) 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) SLP VSET VFB COMP EN/PWM VCC OUT1 CS1 2 3 4 5 6 7 8 16 […]

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RT6032 Datasheet

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