SSMG501 SECOS | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 4

Technical content

Low Power Constant Current LED Driver 11-Dec-2009 Rev. B Page 1 of 4 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. 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.

FEATURES

/circle6 18mA~30mA constant current regulator /circle6 Self power structure, no extra power supply is needed /circle6 0.4V~17V output voltage /circle6 2 µS/2 µS current rising/falling time /circle6 Cascade-able for higher voltage application /circle6 No external current setting resistor is needed /circle6 1.6V~12V supply voltage /circle6 PWM dimming by V DD pin /circle6 -40 ℃~120 ℃ junction operating temperature /circle6 Less than 1%/V load(or line) regulation

APPLICATIONS

/circle6 General LED Lighting /circle6 LED back lighting /circle6 LED torch/flashing /circle6 RGB lighting 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) SOT -23 A 2.70 3.10 G 0.09 0.18 B 2.10 3.00 H 0.45 0.70 C 1.20 1.80 J 0.08 0.25 D 0.89 1.40 K - - E 1.78 2.04 L 0.89 1.02 F 0.30 0.50 Top View A L C B D G H JF K E 1 2

Low Power Constant Current LED Driver 11-Dec-2009 Rev. B Page 2 of 4 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. BLOCK DIAGRAMS PER CHANNEL AND IDEAL I V CHARACTERISTICS TERMINAL DESCRIPTION Pin name Function Pin # VDD Power supply 2 VP Current in 1 VN Current out 3 ABSOLUTE MAXIMUM RATINGS (T A = 25° C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V DD 0 ~ 17 V Output Voltage V P -0.2 ~ 20 V Output Current I PN IS +10% mA Power Dissipation P D 250 mW Thermal Resistance R θJA 300 /W ℃ Operating Temperature T OPR -40 ~ +85 ℃ Storage Temperature T STG -55 ~ +150 ℃ ELECTRICAL CHARACTERISTICS AND RECOMMENDED OPERATIN G CONDITIONS PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT Supply Voltage V DD Room Temp. 1.6 - 12 V Supply Current I DD - 100 150 250 µA VDD =5V, I P I≒ S 0.4 - 17 V VDD =3V, I P I≒ S 0.45 - 17 V Output Voltage V P VDD =1.7V, I P I≒ S 1.2 - 17 V Output Current I S Spec 15 - 30 mA Leakage ILeakage 0.4V > V DD > 0V, V P=15V 1 - 5 µA Line Regulation %/V DD 12V > V DD > 1.6V - - ±1 %/V Load Regulation %/V P 10V > V P > 1.6V - - ±1 %/V Thermal Regulation %/10 ℃ V DD =VP=2V - - ±0.5 %/10 ℃ Threshold Voltage V iboost I P=IS*1.1 11 12 13 V Current Boost I boost V P=Viboost 7 10 13 %* IS ** Is is output saturation current. SWITCHING CHARACTERISTICS (T A = 25° C) PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT Propagation Delay Time VDD “L” → ”H” t pLH VP=1V, VDD=0V → 3V - 1 - µS Output Current Rising Time t Rise VP=1V, VDD=0V → 3V - 1.5 5 µS Propagation Delay Time VDD “H” → ”L” t pHL VP=1V, VDD=3V → 0V - 1 - µS Output Current Falling Time t Fall VP=1V, VDD=3V → 0V - 1.5 5 µS

Low Power Constant Current LED Driver 11-Dec-2009 Rev. B Page 3 of 4 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. TEST CIRCUIT TIMING WAVEFORM CHARACTERISTIC CURVE 1AXX Load Regulation Output Voltage VPN (V) Output Current IPN (mA) 0 2 4 6 8 10 12 14 16 17 Line Regulation Supply Voltage VDD (V) Output Current IPN (mA) 1 1.1 1.3 1.4 1.5 2 3 4 5 6 7 8 10 12 14 VPN =2V Center Current =20mA IDD vs. V DD (Room Temp.) Supply Voltage V DD (V) IDD ( µA) 180 160 140 120 100 IDD vs. Temperature Temperature ( ℃℃ ℃℃) IDD ( µA) 250 200 150 100 -40 0 30 50 70 90 110 120 130

Low Power Constant Current LED Driver 11-Dec-2009 Rev. B Page 4 of 4 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. APPLICATION CIRCUITS

  • 5V PWM Lighting Application ● High Voltage Drop Application
  • 12V Lighting Application ● Parallel Application
  • 36V Lighting Application LED V f = 3.3 V ~ 3.5 V V DD = 35.5 V ~ 40 V 1AXX 1AXX 1AXX 1AXX 1AXX 1AXX