Dimmable Constant Current / Constant Voltage IC Dimmable CC / CV IC for LED Lighting ADT6051 ADT6051 GENERAL DESCRIPTION The ADT6051 is a constant current and constant voltage IC for stable LED driving in a secondary side. This IC is suitable for applications that require power line isolation for safety and reliability, high conversion efficiency, as well as high LED current accuracy. The ADT6051 contains 1) a constant current regulating amplifier with 300mV threshold and within 1% current accuracy; 2) an VCC over voltage comparator to protect the IC when LED string is open or broken; 3) a PWM and analog dimming control for LED lighting system; 4) and a DC output pin for driving an opto-coupler or sourcing power for the other devices. The ADT6051 is offered in SOP8 package. FEATURES • • • • • • • • • • APPLICATIONS Secondary side LED current regulation Operating range up to 60V LED Current accuracy ≤ ±1% Analog dimming control PWM dimming control DC 5V output DC 5V output short protection VCC over voltage protection Over temperature protection SOP8 package • Isolated LED lighting • Dimmable LED lighting TYPICAL APPLICATION CIRCUIT AC • • • • • • • VCC LED • INV GD • PWM ADIM Q1 DC5V • ADT6011 VSEN • • ADT6051 ISEN • • COMP • OUT GND Figure 1. Typical Application Circuit • * This specifications are subject to be changed without notice DEC. 15. 2014 1/4 http://www.ad-tech.co.kr Dimmable Constant Current / Constant Voltage IC ADT6051 PIN CONFIGURATION Pin Name Description 1 ISEN Constant current control input. 2 ADIM Analog dimming input. 3 PWM PWM dimming input. 4 GND Ground. 5 VCC Supply voltage input. 6 VSEN Constant voltage control input 7 DC5V 5V LDO output 8 OUT Open-drain output. Connects this pin to opto-coupler. ISEN 1 ADIM 2 PWM 3 GND 4 ADT6051 Pin No. 8 OUT 7 DC5V 6 VSEN 5 VCC SIMPLIFIED BLOCK DIAGRAM • • • VCC • • DC5V • 5V Regulator VCCOVP 1V • VSEN OUT • ISEN • • • 1V 5V 0.3V • • 600kohm • • • Dimming control GND • PWM 150kohm • OTP ADIM 100kohm • * This specifications are subject to be changed without notice DEC. 15. 2014 2/4 http://www.ad-tech.co.kr Dimmable Constant Current / Constant Voltage IC ADT6051 ABSOLUTE MAXIMUM RATINGS (Note1) Parameter Symbol Rating Units Ground Voltage GND -0.3 V Power Voltage VCC -0.3 ~ 60 V Open Drain Output OUT -0.3 ~ 60 V All Other pins DC5V, VSEN, ISEN, PWM, ADIM -0.3 ~ 6 V Junction Temperature TJ -40 ~ 150 ℃ Storage Temperature TSTG -65 ~ 150 ℃ Thermal Resistance (Note2) θJA 150 ℃/W Note1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Note2. Measured on JESD51-7, 4-layer PCB ELECTRICAL CHARACTERISTICS (VCC = 15V, Ta=25°C , unless otherwise specified) Parameter Conditions Symbol Min. Typ. VCC 8 15 55 V VCCOVP 55 58.5 - V VCCLEDOFF 8.5 10 11.5 V ICC - 0.5 1.0 mA PWM input high level VPWMH 1.5 - - V PWM input low level VPWML - - 0.8 V PWM dimming frequency FPWM 0.1 - 100 kHz PWM duty range DPWM 10 - 100 % Threshold duty (LED OFF) (Note3) DOFF 3.7 6.7 9.7 % Threshold duty (LED ON) (Note3) DON 7 10 13 % Power supply operating range Device supply PWM dimming VCC OVP LED off VCC V(ADIM)=0V VCC quiescent current V(ISEN)=V(VSEN)=0V Pull up current Analog dimming V(PWM)=0V IPULLUP - 9 15 uA Analog dimming input voltage VADIM 0.1 - 1.0 V Threshold voltage (LED OFF) VOFF 37 67 97 mV Threshold voltage (LED ON) VON 70 100 130 mV IADIM -3 0 3 uA GMISEN - 9.5 - V/A Pin input current V(ADIM)=1V Transconductance, Sink current only (Note3) Current control loop Current sensing reference voltage I(OUT)=100uA VISEN 297 300 303 mV Pin input current V(ISEN)=5V IISEN -1 0 1 uA GMVSEN - 5.2 - V/A Transconductance, Sink current only (Note3) Voltage control loop Output stage DC 5V output Temperature protection Max. Units Voltage sensing reference voltage I(OUT)=100uA VVSEN 0.95 1.00 1.05 V Pin input current V(VSEN)=5V IVSEN -1 0 1 uA Lower output voltage, Sink current only I(OUT)=1mA, V(ISEN)=1V VOL - 0.7 1.1 V Output short circuit current. V(OUT)=5V, V(ISEN)=1V IOUTMAX 3 6 10 mA DC 5V output voltage I(DC5V)=5mA VDC5V 4.5 5.0 5.5 V Output short circuit current. V(DC5V)=0V IDC5Vmax 8 16 24 mA OTP - 150 - ℃ OTPHYS - 40 - ℃ Over temperature protection (Note3) OTP hysteresis (Note3) Note 3 : The parameter is guaranteed by design. It is not tested in production. * This specifications are subject to be changed without notice DEC. 15. 2014 3/4 http://www.ad-tech.co.kr Dimmable Constant Current / Constant Voltage IC ADT6051 PACKAGE DIMENSTION * This specifications are subject to be changed without notice DEC. 15. 2014 4/4 http://www.ad-tech.co.kr