Small / Medium Power Lighting LED Driver. 80mA Single channel LED Driver

Transcription

1 Small / Medium Power Lighting LED Driver 216/1/11 8mA Single channel LED Driver Features Up to 8mA single channel constant current regulator 1.6V ~ 18V wide supply voltage range supports self-power structure in lighting application urrent set by an external resistor Minimized.6V (8mA) dropout voltage Fast current rising and falling Built in 15ener diode for bias and high voltage protection Less than ±5% hip to hip current skew Less than ±.5%/V load (or line) regulation 125 ~16 junction temperature current ramp down thermal protect -4 ~ 85 ambient operating temperature ascade-able for higher voltage drop applications Product Description 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 is output enable (OE), and can be used in digital PWM controlled circuits for more precise current adjustment in gray level applications. A special cascade mode is also provided by. In high power supply voltage and low LED load dropout voltage application, two or more 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. With the feature of wide power supply range design and ultra low I DD consumption, the supports the self powered structure in LED lighting applications. In this structure, the no need to be provided a dedicate power circuit even the system power voltage is much higher than the maximum operation voltage of. The power can be gotten from the proper position in LED series of system. Applications General LED lighting Decoration lighting for architecture LED torch / flash light RGB lighting RGB display / indicator Package Type SOT 23-6 (8mA) (Part No.: ST) R EXT Terminal Description Pin name R EXT Mode Zener Diode Ground Function urrent setting Resistor urrent sink ascade / Normal mode selection Power supply Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

2 Block Diagram V LOAD Load Mode Vrefence R EXT Ideal IV characteristic V MODE = V (cascade mode) V MODE = or Floating I I Is Iboost Is Vt Viboost V Vt V Mode Mode Pin urrent boost Leakage (Max.) ascade mode V MODE = V +5%~+11%* I 55uA Normal mode V MODE = / Floating -.5uA Maximum Ratings (T = 25 ) haracteristic Symbol Rating Unit Supply voltage ~ 2 V Input voltage V MODE -.2 ~ V -.2 ~ 18 V Output voltage(output enable) V _Enable -.2 ~ 16 V Output voltage(output disable) V _Disable -.2 ~ 2 V Output current I 12 ma Power Dissipation (Ta=25 ) PD.4 W Thermal Resistance (On PB, Ta=25 ) R TH(j-a) 3 /W Operating temperature T OPR -4~+85 Storage temperature T STG -55~ Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

3 Electrical haracteristics and Recommended Operating onditions haracteristic Symbol ondition Min. Typ. Max. Unit Supply voltage Room Temp. V = 1V V Supply voltage rising and falling speed *1 Output voltage spd V _Enable 5V us > 5V > 1.6V, V P D P D_recomd V _Disable <.8V V Supply current I DD 18V ua Minimum dropout voltage V OUT 3V I S 2mA I S 8mA Output current I 3V ma urrent set voltage V > 1.6V, Room Temp mv Leakage I Leakage = V, V = 15V V MODE = V V MODE = Zener break down voltage Room Temp V Zener current I Z ma Line regulation %/ 13V > > 3V - - ±.5 %/V 15V > V Load regulation %/V >.4V, P - - ±.5 %/V V MODE = V Thermal regulation %/1 DD = 3V, V = 1V, -1 - %/1 Temperature < 125 Output ramp down T1 Output enabled temperature Shutdown temperature T2 I = urrent boost voltage V iboost V MODE = V V urrent boost I boost V MODE = V, V varies from 11V to 13V hip current skew I Skew = 3V, V = 1V % Power Dissipation P D_recomd Room Temp W *1 For the stable reason, the rising and falling speed of supply voltage (VDD) on should be slower when higher VDD than 5V is adopted. Fast and high VDD transition will bring the timing of output current instable. Please refer to typical application circuit in this specification for proper using. V ua % * I Switching haracteristics (T = 25 ) haracteristic Symbol ondition Min. Typ. Max. Unit Propagation Delay Time from L to H t plh V = 1V, = V 3V.5 1 us Output current rising time t Rise V = 1V, = V 3V us Propagation Delay Time from H to L t phl V = 1V, = 3V V 3 1 ns Output current falling time t Fall V = 1V, = 3V V 1 3 ns Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

4 Timing Waveform 5% 5% t plh 9% 5% 1% t phl 9% 5% 1% t Rise t Fall Test ircuit V LOAD Function Generator R Load R D Output urrent Setting The output current of is set by an external resistor (R EXT). The output current can be figured out by following equation. I R EXT.16V.14 Thermal protection When junction temperature is more than thermal protection temperature (~125 ), the output current of will start to decrease to lower down the power dissipation on chip. If the junction temperature reach 16, the output current will almost shut down. The output current will restore in the same way when the temperature decrease. I State Normal (T T1) Thermal protect (T1 T2) Unit I 2 I 1 Temperature I variation %/1 I T T1 T2 Temperature Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

5 Output current Iopt(mA) Output current Iopt(mA) Output current Iopt(mA) NumEn Tech. Output I/V urve 1 Normal mode load regulation = 3V mA 4mA 6mA 8mA 2 Output voltage V (V) ascade mode load regulation = 3V 5mA 2mA 6mA 8ma Output voltage V (V) Output difference between cascade mode and normal mode = 3V Normal mode 8mA ascade mode 8mA Output voltage V (V) Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

6 Output current I (ma) Output current I (ma) Output current Iopt(mA) NumEn Tech. 1 Line regulation V = 1V mA 4mA 6mA 8mA 2 Supply voltage (V) 8 I DD vs. V = 1V Supply voltage (V) I vs. Temperature Temperature ( ) = 3V V = 1V 8mA Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

7 Typical Application ircuit D power general lighting D power dimming application V LED ( 6V) V LED.47uF LED stream (Option).47uF LED stream Mode 1nF ~ 1nF 1nF ~ 1nF PWM signal R G 5K RG: power supply transition slow down resistor D PWM dimming application V LED ( 6V) D PWM dimming application (No leakage current) V LED ( 18V).47uF LED stream.47uf LED stream Function Generator (VDD 5V) Function Generator (VDD 5V) (option).1uf (option).1uf Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

8 ascade application VLED.47uF VLED 1nF ~ 1nF V LED VF (total) t 1nF ~ 1nF By cascade mode, two or more in series can absorb higher voltage variation in lighting system. Each can share about 12 volts redundant. The total voltage variation range that system can work is calculated by following equation. VLED (max) 12 * N () + VF (total) Where V LED(max) is the system power voltage, N () is the number of and VF (total) is the total forward voltage of all LEDs. Note: Generally, The capacitance of capacitor when self-power structure is used is about the same as LED typical current. For example, if the typical current of LED is 2mA, the capacitance is about 2nF. The capacitance can be adjusted according to the requirement of real applications Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX:

9 Package Dimensions SOT 23-6 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 Ver.5 3F., No. 96, Sec. 1, Jiafong 6 th Road, Jhubei ity, Hsinchu ounty 32, Taiwan. TEL: FAX: