SSMG501 Series Elektronische Bauelemente Low Power Constant Current LED Driver RoHS Compliant Product A suffix of “-C” specifies halogen or lead -free DESCRIPTION SSMG501 is a simple general purpose current regulation component that can be easily used in various LED lighting applications. With the excellent load/line regulation and minimized chip current skew, SSMG501 keep LED’s current very stable even when power or load fluctuate in a wide range and make intensity very uniform in large area of LED light source. Except power supply function, the VDD pin of SSMG501 is output enable (OE) also, and can be used in digital PWM controlled circuit to achieve more precise current adjusting in gray level applications. The minimized power supply voltage let SSMG501 be used as a current regulative diode (CRD) when VDD and VP pin are tight together. This application makes SSMG501 very easy to be used. Just like a diode, when this diode is inserted in LED series, the current in circuit is regulated. In high supply voltage and low LED load voltage application, two or more single channel SSMG501 can be connected in series to share redundant high voltage. the extra redundant voltage can be share by each SSMG501 by a reasonable mechanism. This special capability let SSMG501 very suit for the usage of wide range power supply that many liner type LED drivers cannot work. SOT-23 FEATURES 18mA~30mA constant current regulator Self power structure, no extra power supply is needed 0.4V~17V output voltage 2µS/2µS current rising/falling time Cascade-able for higher voltage application No external current setting resistor is needed 1.6V~12V supply voltage PWM dimming by VDD pin -40℃~120℃ junction operating temperature Less than 1%/V load(or line) regulation APPLICATIONS General LED Lighting LED back lighting LED torch/flashing RGB lighting A L 3 3 C B Top View 1 1 K 2 E 2 D F G REF. A B C D E F Millimeter Min. Max. 2.70 3.10 2.10 3.00 1.20 1.80 0.89 1.40 1.78 2.04 0.30 0.50 H REF. G H J K L J Millimeter Min. Max. 0.09 0.18 0.45 0.70 0.08 0.25 0.89 1.02 MARKING CODE SSMG501-18: 1A18 SSMG501-20: 1A20 SSMG501-25: 1A25 SSMG501-30: 1A30 Note: 18, 20, 25, 30 = Output Current(mA) PACKAGE INFORMATION Weight: 0.07800g (Approximately) http://www.SeCoSGmbH.com/ 11-Dec-2009 Rev. B Any changes of specification will not be informed individually. Page 1 of 4 SSMG501 Series Low Power Constant Current LED Driver Elektronische Bauelemente BLOCK DIAGRAMS PER CHANNEL AND IDEAL IV CHARACTERISTICS TERMINAL DESCRIPTION Pin name Function VDD Power supply VP Current in VN Current out Pin # 2 1 3 ABSOLUTE MAXIMUM RATINGS (TA = 25°C) SYMBOL RATINGS UNIT Supply Voltage PARAMETER VDD 0 ~ 17 V Output Voltage VP -0.2 ~ 20 V Output Current IPN IS** +10% mA Power Dissipation PD 250 mW ℃/W Thermal Resistance RθJA 300 Operating Temperature TOPR -40 ~ +85 ℃ Storage Temperature TSTG -55 ~ +150 ℃ ELECTRICAL CHARACTERISTICS AND RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL CONDITION Supply Voltage VDD Room Temp. 1.6 - 12 V Supply Current IDD - 100 150 250 µA VDD=5V, IP≒ IS** 0.4 - 17 V Output Voltage VP VDD=3V, IP≒ IS** 0.45 - 17 V VDD=1.7V, IP≒IS** 1.2 - 17 V Output Current MIN TYP MAX UNIT IS Spec 15 - 30 mA Leakage ILeakage 0.4V > VDD > 0V, VP=15V 1 - 5 µA Line Regulation %/VDD 12V > VDD > 1.6V - - ±1 %/V Load Regulation %/VP 10V > VP > 1.6V - - ±1 %/V %/10℃ VDD=VP=2V - - ±0.5 %/10℃ Thermal Regulation Threshold Voltage Viboost IP=IS*1.1 11 12 13 V Current Boost Iboost VP=Viboost 7 10 13 %* IS ** Is is output saturation current. SWITCHING CHARACTERISTICS (TA = 25°C) SYMBOL CONDITION MIN TYP MAX UNIT Propagation Delay Time VDD “L” →”H” PARAMETER tpLH VP=1V, VDD=0V→3V - 1 - µS Output Current Rising Time tRise VP=1V, VDD=0V→3V - 1.5 5 µS Propagation Delay Time VDD “H” →”L” tpHL VP=1V, VDD=3V→0V - 1 - µS Output Current Falling Time tFall VP=1V, VDD=3V→0V - 1.5 5 µS http://www.SeCoSGmbH.com/ 11-Dec-2009 Rev. B Any changes of specification will not be informed individually. Page 2 of 4 SSMG501 Series Low Power Constant Current LED Driver Elektronische Bauelemente TEST CIRCUIT TIMING WAVEFORM 1AXX CHARACTERISTIC CURVE Line Regulation Load Regulation 25 Output Current IPN (mA) Output Current IPN (mA) 25 20 15 10 20 15 VPN =2V Center Current =20mA 10 5 5 0 1 0 0 2 4 6 8 10 12 14 16 1.1 1.3 1.4 1.5 17 2 3 4 5 6 7 8 10 12 14 Supply Voltage VDD (V) Output Voltage VPN (V) IDD vs. VDD (Room Temp.) IDD vs. Temperature 180 250 160 200 140 IDD (µA) IDD (µA) 120 100 80 150 100 60 40 50 20 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 6 7 8 Supply Voltage VDD (V) http://www.SeCoSGmbH.com/ 11-Dec-2009 Rev. B 9 10 12 15 16 17 -40 0 30 50 70 90 110 120 130 Temperature (℃ ℃) Any changes of specification will not be informed individually. Page 3 of 4 SSMG501 Series Elektronische Bauelemente Low Power Constant Current LED Driver APPLICATION CIRCUITS ● 5V PWM Lighting Application ● High Voltage Drop Application 1AXX 1AXX 1AXX ● 12V Lighting Application ● Parallel Application 1AXX 1AXX 1AXX ● 36V Lighting Application LED Vf = 3.3 V ~ 3.5 V VDD = 35.5 V ~ 40 V http://www.SeCoSGmbH.com/ 11-Dec-2009 Rev. B Any changes of specification will not be informed individually. Page 4 of 4