原厂授权一级代理，深圳市诚信联科技有限公司 古小姐，０７５５－８６０９１９６３ １３２－４９８２－７１７０ Ｑ：１２６２３１４６７５ １１３９１９６８０６ 台湾数能的ＮＵ３１１恒流驱动芯片，全电压输入，宽电压输出，适合１２串至２４串，一根电源搞定，不需要再调参数 2012/12/12 NU311 Lighting LED Driver Data sheet High Power Factor & Accuracy Constant Current LED Driver Features Applications High Power Factor by One Cycle Control E26/27, T5/T8 LED Lamp Accuracy Constant Current Others LED Lighting Applications Low BOM Cost Linear Dimming on DIM Pin Average Current / Fixed Frequency Control Gate Output Voltage Clamp LED Open Protection (OVP) LED Short Protection (SCP) Over Current Protection (OCP) Internal OTP Protection 300mA Driving Capability for OUT Pin Fast Start Current Package Type SOT 26 Product Description Pin Description The NU311 is a highly-integrated, low startup current, average current mode, one cycle control PFC and fixed switching frequency PWM controller. These Pin functions enable the LED driver to easily meet the No. accuracy average LED current and high power factor 1 VCC Power Supply Pin requirements. The integrated functions also include the 2 GND Ground Pin 3 OUT Name Function The Output Driver for Driving The External LED short protection, open protection, and internal over MOSFET temperature protection. The COMP pin controls the duty Dimming Control Pin by Input a DC by connected an RC compensation network to ground and 4 DIM Voltage forming the closed loop feedback control. To protect the external power MOSFET from being damaged by supply 5 COMP 6 CS over voltage, the NU311 OUT pin voltage is clamped to Feedback Compensation Network Current Sense Pin, Connect to Sense The about 15V. MOSFET Current The NU311 improves the performance and reduces the cost of the LED driver. It is a 6-pin SOT-26 package. -1- Ver. 01 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. NU311 Block Diagram VCC UVLO Internal Bias & Vref All Blocks 15V/ 7V Vref OK VCC OK VCCOVP + 31.5 V EN 40us debounce - Over -temperature protection OTP Protection OCP CS + 0.8V - COMP V-V R + VREF Q Driver stage OUT + - R - Current Waveform modulation S OSC DIM Dimming Function GND Maximum Ratings (T = 25°C) Characteristic Symbol Rating Unit VCC 0 ~ 30 V VDIM, VCOMP,VCS -0.3 ~ 7 V Output voltage(OUT) VOUT 15 V Power Dissipation (Ta=25°C) PD 0.25 W RTH(j-a) 250 °C /W ESD Voltage Protection, Human Body Model ESDHUM 2 KV ESD Voltage Protection, Machine Model ESDMACH 200 V Junction Temperature Tj 150 °C Operating temperature TOPR -20~+85 °C Lead Temperature(soldering,10 sec) TLEAD +260 °C Storage temperature TSTG -65~+150 °C Supply voltage Output voltage(DIM,COMP,CS) Thermal Resistance (On PCB, Ta=25°C) -2- Ver. 01 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. NU311 Electrical Characteristics and Recommended Operating Conditions Electrical Characteristics (VCC = 15.0V & TA = +25℃, unless otherwise specified.) Parameter Pin Min. Typ. Max. Unit SUPPLY VOLTAGE Startup Current (VCC=UVLO on - 1V) 1 8 15 uA Operating Current (with 1nF load on OUT pin), Vcomp = 2.5V 1 2 3 mA 1 0.7 1 mA Operating Current (with 1nF load on OUT pin), Protection Tripped (OCP, OVP, SCP, OTP) UVLO(off) 1 6 7 8 V UVLO(on) 1 14 15 16 V OVP Level on VCC Pin 1 29.5 31.5 33.5 V OVP De-Bounce Time 1 40 us VOLTAGE FEEDBACK Feedback Reference Voltage 5 0.195 0.200 0.205 V Tran-Conductance 5 120 uS Output Sink Current 5 12 uA Output Source Current 5 12 uA CURRENT SENSING Input Over Voltage Protection 6 0.7 0.80 0.9 V Open Loop Voltage, CS Pin Open 6 5 V Leading-Edge Blanking Time 6 410 nS Delay to Output 6 100 220 nS 45 48 KHz SWITCHING FREQUENCY Switching Frequency - 42 Maximum Duty - 90 Frequency Jitter Range % +/-4 % Temp. Stability (-40°C ~ 125°C) - 6 % Voltage Stability (VCC = 11V~25V) - 1 % GATE DRIVER OUTPUT Rising Time, Load Capacitance = 1000pF 3 160 320 nS Falling Time, Load Capacitance = 1000pF 3 80 160 nS VGATE-Clamp (VCC = 25V ) 3 13.5 15 V DIM INPUT SECTION Saturation Threshold Voltage 4 3.0 Linear Dimming Range 4 0.3 LED Current off Threshold Voltage 4 -3- V 3.0 V 0.5 V Ver. 01 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. NU311 4 Current Source 270 300 330 uA OTP SECTION OTP Trip Point - 150 ℃ OTP Release Point - 130 ℃ OTP Threshold Level - 20 ℃ OTP De-Bounce Time - 80 uS Note: 1. OVP, OCP, SCP, OTP: Auto Recovery Type -4- Ver. 01 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. NU311 Typical Performance Characteristics -5- Ver. 01 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. NU311 Application Information Start-up Current The typical start-up current is around 8uA. Very low start-up current allows the PWM controller to increase the value of start-up resistor and then reduce the power dissipation on it. UVLO (Under Voltage Lockout) A hysteresis UVLO comparator is implemented in NU311, then the turn-on and turn-off thresholds level are fixed at 15V and 7V respectively. This hysteresis ensures that the start-up capacitor will be adequate to supply the chip during start-up. For quickly startup the LED driver, the start-up resistor should be matched with the startup capacitor. Due to the low UVLO on level, so the turn-on delay time will also never greater than the general PWM IC. -6- Ver. 01 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. NU311 Vcc UVLO (on) 15V UVLO (off) 7V Oscillator The maximum duty-cycle of internal oscillator is up to 90% for driving high LED voltage string. The frequency of the oscillator is fixed to 45KHz by internal setting. LEB (Leading-Edge Blanking) Each time the power MOSFET is switched on, a turn-on spike will inevitably occur at the sense resistor. To avoid fault trigger, a 410ns leading-edge blanking time is built in. Conventional RC filtering can therefore be omitted. During this blanking period, the current-limit comparator is disabled and can not switch off the gate driver. OCP (Over Current Protection) The NU311 has an over current protection function on CS pin. An internal circuit detects the current level, when the current is larger than a threshold level, the gate output will keep on low level. Then VCC decreases below UVLO off level, the controller resets again. OVP (Over Voltage Protection) on VCC To prevent the LED driver from being damaged, the NU311 is implemented an OVP function on VCC. When the VCC voltage is higher than the OVP threshold voltage 31.5V, the output gate driver circuit will be shut down immediately to stop the switching of power MOSFET. The VCC pin OVP function is an auto recovery type protection (latch off type optional). If the OVP condition happens, the pulses will be stopped and never recovery unless the VCC pin voltage is down to the UVLO off level. The NU311 is working in an auto-recovery mode. VCC OVP Tripped OVP UVLO on UVLO off t OUT Switching Non- Switching Switching t -7- Ver. 01 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. NU311 Gate Clamp/Soft Driving Driver is clamped to 15V by an internal clamping circuit. Those damages usually come from undesired over-voltage gate signals. Under the conditions listed below, the gate output will turn off immediately to protect the power circuit. The NU311 also has soft driving function to minimize EMI. Over Temperature Protection/Dimming Function Saturation DIM pin VH_ TH 3.0V Linear Dimmimg range NTC 0.3V VL_ TH Latch off mode The NTC thermistor is setting as an external OTP protection. In the DIM pin, there is one comparator for latch-off mode protection. While the voltage on this pin is lower than 0.3V, the NU311 will shut down. When the voltage is in the range of 0.3 to 3.0V, the NU311 is operating on the linear dimming range. While the voltage is higher than 3.0V, the NU311 is operating on the normal status. It also could let this Pin open when the function is not required for the user. -8- Ver. 01 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. NU311 Application Circuits AC input EMI Filter VCC GND UVLO OUT 15V/7V COMP DIM VREF Dimming Control Logic CS NTC GND LED -9- Ver. 01 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. NU311 Package Dimensions SOT26 SOT-26 SYMBOL MILLIMETERS MIN. INCHES MAX. A MIN. MAX. 1.45 0.057 A1 0.00 0.15 0.000 0.006 A2 0.90 1.30 0.035 0.051 b 0.30 0.50 0.012 0.020 c 0.08 0.22 0.003 0.009 D 2.70 3.10 0.106 0.122 E 2.60 3.00 0.102 0.118 E1 1.40 1.80 0.055 0.071 e 0.95 BSC 0.037 BSC e1 1.90 BSC 0.075 BSC L 0.30 0.60 o θ 0 8 o 0.012 o 0 0.024 8 o Note: 1. Followed from JEDEC TO-178 AB. 2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 10 mil per side - 10 - Ver. 01 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. NU311 Carrier Tape & Reel Dimensions SOT26 Application SOT-26 A H T1 C d D W E1 F 178.0±2.00 50 MIN. 8.4+2.00 -0.00 13.0+0.50 -0.20 1.5 MIN. 20.2 MIN. 8.0±0.30 1.75±0.10 3.5±0.05 P0 P1 P2 D0 D1 T A0 B0 K0 4.0±0.10 4.0±0.10 2.0±0.05 1.5+0.10 -0.00 1.0 MIN. 0.6+0.00 -0.40 3.20±0.20 3.10±0.20 1.50±0.20 Application Carrier Width Cover Tape Width Devices Per Reel SOT -26 8 5.3 3000 Unit: mm Tape and Specification Reel SOT26 Direction of feed - 11 - Ver. 01 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. NU311 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. - 12 - Ver. 01 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