原厂授极一级代理商 深圳市诚信联科技有限公司，联系人：古小姐，电话０７５５－８６０９１９６３ １３２４９８２７１７０ Ｑ：１２６２３１４６７５ １１３９１９６８０６ 2012/09/13 NU511 High Constant Current LED Driver Datasheet 1.2A Single Channel LED Driver Features Applications 100mA~1.2A, single channel constant current regulator Output current adjustable by external resistor 3V ~ 12V wide range supply voltage 1MHz OE dimming support 400Hz VDD dimming support 0V ~ 17V output sustain voltage low output voltage dropout 0.2V dropout at 150mA output 0.6V dropout at 1.2A output Minimized IDD consumption 160℃ half power thermal protect Less than ±4% chip current skew Less than 0.5%/V line regulation Less that 1%/V load regulation Green package General LED Lighting Decoration lighting for architecture LCD back lighting Street lamp Package Type TO252-5L NU511 XXXX Product Description The NU511 is a single channel, open drain, linear constant current LED driver. With up to 1.2A driving current and maximum 1Mhz PWM dimming control support, NU511 can be used for 0.5W to 3W high power LED string in general or architecture decoration lighting applications. REXT Out Gnd VDD OE Terminal Description The capability of wide power supply range makes NU511 work stably in uncertain power supply applications. When the power supply voltage is changed or fluctuating, the output current still remain unchanged. With this dedicate designed function, the VDD power can be derived easily from the whole lighting system. Pin # 1 2 3 4 5 The output current of NU511 is set by an external resistor. While in full current output, the NU511 only need about 0.6V drop on output channel. The minimized voltage drop will increase the working range that limited by LED forward voltage variation in lighting system, to enhance the system efficiency and lower the heat generation from NU511. Pin name REXT OUT Gnd VDD OE Function R external Output Ground Power Output enable Protection Circuit 8KV output channel ESD protection -1- Ver.03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Maximum Ratings (T = 25°C) Characteristic Symbol Rating Unit Supply voltage VDD 3.0 ~ 16 V Output voltage VOUT -0.2 ~ 20 V Input voltage VOE -0.2 ~ VDD V Output current IOUT 1.4 A Ground terminal current IGND 1.4 A Power Dissipation (On PCB) PD 3.2 W RTH(j-a) 42 °C /W Operating temperature TOPR -40 ~ +130 °C Storage temperature TSTG -55 ~ +150 °C Thermal Resistance Electrical Characteristics and Recommended Operating Conditions Characteristic Symbol Condition Min. Typ. Max. Unit Supply voltage VDD Room Temp. 3 - 12 V Output sustain voltage Vomax IOUT = 0A - - 17 V Output current IOUT - 100 - 1200 mA VDD = 5V, IOUT = 150mA 0.2 - - V VDD = 5V, IOUT = 350mA 0.3 - - V VDD = 5V, IOUT = 1200mA 0.6 - - V Output drop out voltage VOUT Chip to chip current skew VDD >=3V dIOUT2 IOUTn = 1200mA - ±2 ±3.5 % Leakage ILeakage VOUT = 7V - - 1 uA VDD < 5V - 0.7*VDD - VDD >= 5V - - 3.5 VDD < 5V - 0.3*VDD - VDD >= 5V - - 1.5 VIH OE Input voltage VIL V Pull down resistor (OE) RPD - 400 500 700 KΩ Line regulation %/VDD 3V < VDD < 12V - - 0.5 △%/V Load regulation %/VOUT 0.5V < VOUT < 8V - - 1 △%/V Operating Temperature TOPR Ambient temperature -40 - 85 °C Thermal protect (Junction temperature) THalfP Half current output - 160 - °C Thermal regulation %/10℃ - - - 0.5 △%/10℃ REXT = Open, Output off - 0.3 1 mA IOUT = 365mA, Output on 2 4 4.5 mA IOUT = 700mA, Output on - 4.7 - mA IOUT = 1000mA, Output on - 5.0 - mA VDD < 12V 5 - 24 V Supply current System voltage IDD VLED -2- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Switching Characteristics (T = 25°C) Characteristic Symbol Condition Min. Typ. Max. Unit Propagation Delay Time (OE from “L” to “H”) tpLH VDD=4V, VOUT=1V, IOUT=120mA, OE= 0V → 4V 200 280 360 nS Output current rising time (OE from “L” to “H”) tOERise VDD=4V, VOUT=1V, IOUT=120mA, OE= 0V → 4V 30 50 80 nS Propagation Delay Time (OE from “H” to “L”) tpHL VDD=4V, VOUT=1V, IOUT=120mA, OE= 4V → 0V 560 620 680 nS Output current falling time (OE from “H” to “L”) tOEFall VDD=4V, VOUT=1V, IOUT=120mA, OE= 4V → 0V 60 90 130 nS Propagation Delay Time ( VDD from “L” to “H”) tpON VOUT=1V, IOUT=120mA, VDD=OE= 0V → 3V - 30 - uS Output current rising time ( VDD from “L” to “H”) tVDDRise VOUT=1V, IOUT=120mA, VDD=OE= 0V → 3V - 5 Propagation Delay Time ( VDD from “H” to “L”) tpOFF VOUT=1V, IOUT=120mA, VDD=OE= 3V → 0V - 3 Output current falling time ( VDD from “H” to “L”) tVDDFall VOUT=1V, IOUT=120mA, VDD=OE= 3V → 0V - 5 uS - uS uS Timing Waveform OE 50% VDD 50% tpLH 90% 50% 10% TOERise 50% tpON tpHL 90% 50% 10% VOUT 50% tpOFF 90% 50% 10% VOUT 90% 50% 10% TVDDRise TOEFall OE timing diagram TVDDFall VDD timing diagram (VDD=VOE) -3- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Test Circuit VDD VDD VLED VLED OUT OUT VDD VDD Function Generator OE OE NU511 NU511 REXT GND REXT GND OE dimming and IOUT test circuit VDD dimming test circuit Block Diagram VDD REXT Internal power LDO OUT IOUT Regulator OE Equivalent Circuits for Inputs There is only one OE input terminal to which a pull down resistor is connected. While OE is high voltage, the output channel is turned on. VDD OE -4- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Output Current Setting The output current of each channel of NU511 is set by an external resistor (REXT). The relationship between output current and external resistor is shown in the figure or calculated from the equation following. 1.40 1.20 I OUTn Iout (A) 1.00 590 R EXT 0.80 0.60 0.40 0.20 500 660 820 980 1140 1300 1460 1620 1780 1940 2100 2260 2420 2580 2740 2900 3060 3220 3380 3540 3700 3860 4020 4180 4340 4500 4660 4820 4980 5140 5300 5460 0.00 Rext (ohm) I/V Curve IOUT vs. VOUT curve (Single channel) VDD = 5V 1400 REXT=490Ω , IOUT=1.2A 1200 IOUT 1000 800 REXT=0.9K, IOUT=650mA 600 400 REXT=1.8K, IOUT=325mA REXT=2.4K, IOUT=243mA 200 REXT=7.2K, IOUT=81mA 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VOUT -5- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Typical Application Circuit General lighting application 1 Dimming application General lighting application 2 -6- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Note: 1. For the heat consideration on driver, VOUT of NU511 should be minimized. The power calculation equation is shown as bellow. VOUT = VLED – VF * n PD = VOUT * IOUT Where VOUT is the voltage on output pins, IOUT is output current of NU511, VF is voltage drop of LED and n is the number of LEDs. In some higher VOUT applications, to series a proper resistor in output current path can decrease the VOUT and get less heat generation from NU511. 2. For the efficiency consideration, higher VLED voltage and more LEDs in current path will get higher electrical efficiency. With the wide range supply voltage design and self powering structure like the lighting application circuit on previous page, NU511 can be used in maximum 24V (VLED) power system. 3. More LED in series, the total voltage drop variation on LEDs will increase. This variation is derived from the different VF bins of LEDs and LED temperature rising while system is working. That probably increases PD. So, it is another trade off to select the proper VLED voltage and the number of LEDs in system. The more output current is driving, the less LED in series is better. Power Dissipation 3.5 Power Dissipation (W) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperature (degree C) -7- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Package Dimensions Taping Specification PACKAGE Q’TY/REEL TO252-5 3,000 ea -8- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805 NumEn Tech. NU511 Restrictions on product use NUMEN Tech. reserves the right to update these specifications in the future. The information contained herein is subject to change without notice. NUMEN Technology will continually working to improve the quality and reliability of its products. Nevertheless, semiconductor device in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing NUMEN products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such NUMEN products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that NUMEN products are used within specified operating ranges as set forth in the most recent NUMEN products specifications. The NUMEN products listed in this document are intended for usage in general electronics applications (lighting system, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These NUMEN products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of NUMEN products listed in this document shall be made at the customer’s own risk. -9- Ver. 03 Please visit http://www.numen-tech.com for more patent information. th 3F., No. 96, Sec. 1, Jiafong 6 Road, Jhubei City, Hsinchu County 302, Taiwan. TEL: +886-3-658-9936 FAX: +886-3-550-2805