2013/04/10 Small / Medium Power Lighting LED Driver NU502 80mA Single channel LED Driver Features Applications 诚信联１３２－４９８２－７１７０ Up to 80mA single channel constant current regulator 1.6V ~ 18V wide supply voltage range supports self power structure in lighting application Current set by an external resistor Minimized 0.6V (80mA) dropout voltage Fast current rising and falling Built in 15V Zener diode for bias and high voltage protection Less than ±4% Chip to Chip current skew Less than ±0.5%/V load (or line) regulation General LED lighting Decoration lighting for architecture LED torch / flash light RGB lighting RGB display / indicator Package Type SOT 23-6 125°C ~160°C junction temperature current ramp down thermal protect -40℃ ~ 85℃ ambient operating temperature Cascade-able for higher voltage drop applications Product Description NU502 is a small/medium power linear current regulation component that can be easily used in various LED lighting applications. It is equipped the excellent feature of good load/line regulation capability, minimized chip current skew, stable output current in high power or load voltage fluctuating environment that can be used in wide area of LED lighting source to maintain the uniformity of light intensity. Except for the power supply function, the VDD pin of NU502 is output enable (OE), and can be used in digital PWM controlled circuits for more precise current adjustment in gray level applications. Terminal Description Pin name A special cascade mode is also provided by NU502. In high power supply voltage and low LED load dropout voltage application, two or more NU502 can be connected in series to share redundant high voltage. With the exclusive voltage sharing technology of NUMEN tech., the extra redundant voltage that exceeds the preset threshold voltage (Viboost) can be shared by next NU502. VZ Function Zener Diode GND Ground REXT Current setting Resistor OPT Current sink Mode Cascade / Normal mode selection VDD Power supply With the feature of wide power supply range design and ultra low IDD consumption, the NU502 supports the self powered structure in LED lighting applications. In this structure, the NU502 no need to be provided a dedicate power circuit even the system power voltage is much higher than the maximum operation voltage of NU502. The VDD power can be gotten from the proper position in LED series of system. -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 2013/04/10 Small / Medium Power Lighting LED Driver NU502 80mA Single channel LED Driver Block Diagram VLOAD VDD Load Mode OPT VZ Vrefence GND REXT Ideal IV characteristic VMODE = VOPT (cascade mode) VMODE = GND (default, normal mode) IOPT IOPT Iboost Is Is Vt Viboost Vt VOPT VOPT Mode Mode Pin Current boost Leakage (Max.) Condition Cascade mode VMODE = VOPT +5%~+11%* IOPT 55uA Normal mode VMODE = GND - 0.5uA VDD = 0V, VOPT = 15V Maximum Ratings (T = 25°C) Characteristic Symbol Rating Unit VDD 0 ~ 20 V VMODE -0.2 ~ VDD V VZ -0.2 ~ 18 V Output voltage(Output enable) VOPT_Enable -0.2 ~ 16 V Output voltage(Output disable) VOPT_Disable -0.2 ~ 20 V Output current IOPT 0 ~ 120 mA Power Dissipation (Ta=25°C) PD 0.25 W Supply voltage Input voltage -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. NU502 Thermal Resistance (On PCB, Ta=25°C) RTH(j-a) 400 °C /W Operating temperature TOPR -40~+85 °C Storage temperature TSTG -55~+150 °C Electrical Characteristics and Recommended Operating Conditions Characteristic Symbol Supply voltage VDD Condition Room Temp. VOPT = 1V Min. Typ. 1.6 Max. Unit 18 V VOPT_Enable VDD>1.6V, VOPT*IOPT≦0.25W 15 V VOPT_Disable VDD < 0.8V 18 V Supply current IDD VDD≦18V 100 uA Minimum dropout voltage VOUT Output current IOPT Leakage ILeakage Zener break down voltage VZ Zener current IZ Line regulation %/VDD Load regulation Output voltage VDD ≧ 3V 75 IS≦20mA 0.3 IS≦80mA 0.6 VDD ≧ 3V VDD = 0V, VOPT = 15V V 80 VMODE = VOPT 45 VMODE = GND 55 0.5 Room Temp. 15 mA uA V 20 mA 13V > VDD > 3V ±0.5 %/V %/VP 15V > VOPT > 0.4V, VMODE = GND ±0.5 %/V Thermal regulation %/10℃ VDD = 3V, VOPT = 1V, Temperature < 125℃ 0 %/10℃ Output ramp down temperature T1 Output enabled 125 Shutdown temperature T2 IOPT=0 160 Current boost voltage Viboost VMODE = VOPT 11 Current boost Iboost VMODE = VOPT 5 Chip current skew ISkew VDD = 3V, VOPT = 1V -1 ℃ 13 V 7 11 % * IOPT 2 4 % Typ. Max. Unit Switching Characteristics (T = 25°C) Characteristic Symbol Condition Min. Propagation Delay Time VDD from “L” to “H” tpLH VOPT= 1V, VDD = 0V → 3V 0.5 1 uS Output current rising time tRise VOPT= 1V, VDD = 0V → 3V 0.8 1.5 uS Propagation Delay Time VDD from “H” to “L” tpHL VOPT= 1V, VDD = 3V → 0V 30 100 nS Output current falling time tFall VOPT= 1V, VDD = 3V → 0V 100 300 nS -3- 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. NU502 Timing Waveform 50% VDD 50% tpLH OPT tpHL 90% 50% 10% 90% 50% 10% tRise tFall Test Circuit VLOAD RLoad Function Generator VDD Mode OPT NU502 RD GND R EXT VZ R EXT Output Current Setting The output current of NU502 is set by an external resistor (REXT). The output current can be figured out by following equation. I OPT 0.155V REXT 0.14 Thermal protection When junction temperature is more than thermal protection temperature (~125°C), the output current of NU502 will start to decrease to lower down the power dissipation on chip. If the junction temperature reach 160°C, the output current will almost shut down. The output current will restore in the same way when the temperature decrease. IOPT IOPT2 IOPT1 IOPT0 T1 T0 State Normal (T0 ↔ T1) Thermal protect (T1 ↔ T2) Unit Temperature -40 ↔ 125 125 ↔ 160 ℃ IOPT variation -0.8 -28 %/10℃ Temperature T2 -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. NU502 Output I/V Curve Normal mode output I/V Curve VDD = 3V 100 IOPT (mA) 80 5mA 60 40 20mA 20 60mA 0 80mA 0.1 0.160.18 0.2 0.220.24 0.3 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 12 14 VOPT (V) Cascade mode output I/V Curve VDD = 3V 100 14.5 13.5 12.5 11.5 10.5 9.5 8.5 7.5 6.5 5.5 4.5 3.5 2.5 1.5 80mA 0.5 0 0.3 60mA 0.24 20 0.22 20mA 0.2 40 0.18 5mA 0.16 60 0.1 IOPT (mA) 80 VOPT (V) VDD = 3V 90 80 70 60 50 40 30 20 10 Normal mode 80mA 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0.58 0.56 0.53 0.51 0.45 0.35 0.2 Cascade mode 80mA 0.1 IOPT (mA) Output difference between cascade mode and normal mode VOPT (V) -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. NU502 IOPT vs. VDD IOPT (mA) 100 80 VOPT = 1V 60 5mA 40 20mA 20 60mA 80mA 18 16 14 12 10.5 9.5 8.5 7.5 6.5 5.5 4.5 3.5 2.5 1.9 1.7 1.5 1.3 1.1 0 VDD (V) IDD vs. VDD 80 IDD (uA) 60 40 20 0 0.5 0.8 1.1 1.4 2.1 2.4 3.5 5 6.5 8 9.5 11 14 17 VDD (V) IOPT (mA) IOPT vs. Temperature VDD = 3V 100 90 80 70 60 50 40 30 20 10 0 VOPT = 1V 80mA -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 165 Temperature (℃) -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. NU502 Typical Application Circuit DC power general lighting AC 110V/220V general lighting application VLED (≦60V) RIN LED stream LED stream VDD VDD Mode OPT NU502 NU502 C (Option) 0.1u VZ Mode OPT VZ GND R EXT C VDD GND R EXT R EXT 0.1u R EXT DC PWM dimming application DC PWM dimming application (No leakage current) VLED (≦18V) VLED (≦60V) LED stream LED stream Function Generator Function Generator VDD VDD Mode OPT Mode OPT NU502 NU502 VZ VZ GND R EXT GND R EXT R EXT R EXT -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. NU502 Cascade application VLED VDD Mode OPT VLED NU502 C (Option) VZ VLED GND R EXT R EXT VDD VF (total) Mode OPT t NU502 C (Option) VZ GND R EXT R EXT By cascade mode, two or more NU502 in series can absorb higher voltage variation in lighting system. Each NU502 can share about 12 volts redundant. The total voltage variation range that system can work is calculated by following equation. VLED(max)≒12 * N(NU502) + VF(total) Where VLED(max) is the system power voltage, N(NU502) is the number of NU502 and VF(total) is the total forward voltage of all LEDs. -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. NU502 Package Dimensions SOT23-6 -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. NU502 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. - 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