AS1101

A S 11 0 1 , A S 11 0 2 , A S 11 0 3 , A S 11 0 4 Low-Dropout LED Drivers D a ta S he e t 1 General Description The AS1101/AS1102/AS1103/AS1104 are LED drivers designed to match current source bias for any color LED, including white and blue. The devices can drive up to 4 high-current LEDs, and the LED current is programmable using an external resistor (RSET). The AS1101 LED currents are 460 x ISET (per LED, typ) at an LED cathode voltage (VSAT) of 150mV and 650 x ISET (typ) at a VSAT of 1V, where ISET is the current through RSET connected to pin CTRL. The AS1102, AS1103, and AS1104 LED currents are 230 x ISET (per LED, typ) at a VSAT of 150mV and 325 x ISET (typ) at a VSAT of 1V. The AS1101, AS1102, and AS1104 incorporate a chipenable feature via pin ON. When the devices are disabled, the supply current drops to less than 1µA. The AS1101, AS1102, and AS1103 are available in a 6-pin SC70 package; the AS1104 is available in a 8-pin MSOP package. 2 Key Features ! ! LED Drivers for Parallel-Connected LEDs Ultra-Low Voltage Drop: Less Than 150mV (for Liion Battery Support) Analog and PWM Brightness Control Up to 80mA per LED (AS1101) Up to 40mA per LED (AS1102, AS1103, AS1104) No Electromagnetic Interference, No SwitchingNoise Current-Matching Requires No External Components Active-Low Shutdown Mode (AS1101, AS1102, and AS1103) Low Shutdown-Current: Less Than 1µA SC70-6 Package (AS1101, AS1102, and AS1103) MSOP-8 Package (AS1104) ! ! ! ! ! ! ! ! ! 3 Applications The AS110x devices are ideal for LED displays and keyboard backlights, as well as lighting management units for battery powered audio devices such as MP3 and CD players, mobile and cordless phones, PDAs, portable DVD players, and consumer electronics. 3 Diode Control with Enable VIN Figure 1. Typical Application Diagrams 2 Diode Control with Enable VIN I1/I2 VSAT ISET VSET (3V) RSET CTRL ON GND I3/I4 ISET VSET (3V) I1 VSAT I2 I3 AS1101 RSET CTRL ON AS1102 GND ENABLE ENABLE 4 Diode Control VIN VIN 4 Diode Control with Enable I1 VSAT I2 ISET VSET (3V) RSET CTRL I3 I4 ISET VSET (3V) I1 VSAT I2 I3 I4 AS1103 GND RSET CTRL ON AS1104 GND ENABLE www.austriamicrosystems.com Revision 1.5 1 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - P i n o u t 4 Pinout Pin Assignments Figure 2. Pin Assignments – (Top View) CTRL 1 6 ON CTRL 1 6 ON CTRL 1 6 I3 I1/I2 N/C 2 AS1101 5 I3/I4 GND I2 I1 2 AS1102 5 I3 GND I2 I1 2 AS1103 5 I4 GND 3 4 3 4 3 4 6-Pin SC70 ON 1 8 N/C I3 I4 GND 2 7 CTRL I2 I1 AS1104 3 4 6 5 8-Pin MSOP Pin Descriptions Table 1. Pin Descriptions Pin Number Pin Name CTRL I1 I2 (see Figure 2) I3 I4 GND ON Connect to cathode of LED. Connect to cathode of LED. Connect to cathode of LED. Connect to cathode of LED. Ground Device Enable Input. Description Sets LED current; connect to external resistor. www.austriamicrosystems.com Revision 1.5 2 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those listed in Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter VI1, VI2, VI3, VI4, CTRL and ON Voltage to GND Power Dissipated by Device at TAMB = 85°C I1, I2, I3, I4 Steady State Current Package Body Temperature Junction Temperature Storage Temperature Electrostatic Discharge Protection (ESD) Level † † Min -0.3 Max 5 200 250 100 260 150 Unit V mW mW mA ºC ºC ºC kV Comment SC70-6 MSOP-8 -65 2 150 Human Body Model; Norm: MIL-STD883E 3015 methods. The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020C “Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. Operating Conditions Table 3. Recommended Operating Conditions Parameter LED Cathode Voltage Enable Voltage ON Mode Enable Voltage OFF Mode Ambient Temperature † † † Min 0.15 2.2 0 -40 Typ 0.6 3.0 0.2 25 Max 3.6 3.6 0.5 85 Unit V V V ºC Comments Not applicable to AS1103. www.austriamicrosystems.com Revision 1.5 3 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics AS1101 Electrical Characteristics TAMB = 25°C (unless otherwise noted). Table 4. Electrical Characteristics – AS1101 Parameter ISET Range Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio LED-to-LED Current Matching ISET in OFF Mode Symbol ISET OCMR OCMR OCMR OCMR OCMR OCMR OCMR OCMR OCMR Match ISET,OFF Conditions VON = 3V ISET = 25µA, VSAT = 150mV, VON = 3V ISET = 40µA, VSAT = 150mV, VON = 3V ISET = 75µA, VSAT = 150mV, VON = 3V ISET = 25µA, VSAT = 600mV, VON = 3V ISET = 40µA, VSAT = 600mV, VON = 3V ISET = 75µA, VSAT = 600mV, VON = 3V ISET = 25µA, VSAT = 1000mV, VON = 3V ISET = 40µA, VSAT = 1000mV, VON = 3V ISET = 75µA, VSAT = 1000mV, VON = 3V VON = 3V VCTRL = 3V, VSAT = 3V, VON = 0V VCTRL = 3V, VSAT = 3V, VON = 0V, TAMB = 25ºC VCTRL = 3V, VSAT = 3V, VON = 0V Peak Efficiency † † Min 25 350 335 295 435 425 415 470 460 440 -3 Typ Max Units 150 µA 500 480 420 620 610 590 670 660 630 650 625 545 805 795 765 870 860 820 3 % µA 0.1 0.1 1 1 IIN in OFF Mode IIN,OFF µA 4 95 % η VIN = 3V, VON = 3V Efficiency = (VIN - VSAT)/VIN. Information parameter, guaranteed by design. AS1102, AS1103, AS1104 Electrical Characteristics TAMB = 25°C (unless otherwise noted). Table 5. Electrical Characteristics – AS1102, AS1103, AS1104 Parameter ISET Range Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio Output Current Multiplication Ratio www.austriamicrosystems.com Symbol ISET OCMR OCMR OCMR OCMR OCMR OCMR OCMR OCMR OCMR Conditions VON = 3V ISET = 25µA, VSAT = 150mV, VON = 3V ISET = 40µA, VSAT = 150mV, VON = 3V ISET = 75µA, VSAT = 150mV, VON = 3V ISET = 25µA, VSAT = 600mV, VON = 3V ISET = 40µA, VSAT = 600mV, VON = 3V ISET = 75µA, VSAT = 600mV, VON = 3V ISET = 25µA, VSAT = 1000mV, VON = 3V ISET = 40µA, VSAT = 1000mV, VON = 3V ISET = 75µA, VSAT = 1000mV, VON = 3V Revision 1.5 Min 25 175 170 145 215 215 205 235 230 220 250 240 210 310 305 295 335 330 315 Typ Max Units 150 325 310 275 405 395 385 435 430 410 4 - 13 µA AS1101/AS1102/AS1103/AS1104 Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s Table 5. Electrical Characteristics – AS1102, AS1103, AS1104 Parameter LED-to-LED Current Matching ISET in OFF Mode 1 Symbol Match ISET,OFF Conditions VON = 3V VCTRL = 3V, VSAT = 3V, VON = 0V VCTRL = 3V, VSAT = 3V, VON = 0V, TAMB = 25°C VCTRL = 3V, VSAT = 3V, VON = 0V Min -3 Typ Max Units 3 % µA 0.1 0.1 1 1 IIN in OFF Mode 1 IIN,OFF µA 2 95 % Peak Efficiency 2 η VIN = 3V, VON = 3V 1. Not applicable to AS1103. 2. Efficiency = (VIN - VSAT) / VIN. Information parameter, guaranteed by design. www.austriamicrosystems.com Revision 1.5 5 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - T y p i c a l P e r f o r m a n c e C h a r a c t e r i s t i c s 7 Typical Performance Characteristics Figure 3. Set Current vs. VCTRL 100 90 80 70 Figure 4. Set Current vs.VSET; RSET = 30kΩ 100 90 80 70 ISET (µA) e ISET (µA) e 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 60 50 40 30 20 10 0 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VCTRL (V) Figure 5. AS1101 ILED vs. VSAT 35 30 ISET = 50µA VSET (V) Figure 6. AS1102, AS1103, AS1104 ILED vs. VSAT 30 ISET = 100µA 25 ILED (mA) e ILED (mA) e 25 20 15 10 5 0.0 0.2 0.4 0.6 0.8 1.0 ISET = 25µA 20 15 ISET = 50µA 10 ISET = 25µA 5 0.0 0.2 0.4 0.6 0.8 1.0 VSAT (V) Figure 7. AS1101 OMCR vs. ISET 700 600 500 VSAT (V) Figure 8. AS1102, AS1103, AS1104 OMCR vs. ISET 350 300 250 OCMR 300 200 100 0 0 20 40 60 80 100 120 140 160 OCMR 400 200 150 100 50 0 0 20 40 60 80 100 120 140 160 ISET (µA) ISET (µA) www.austriamicrosystems.com Revision 1.5 6 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - T y p i c a l P e r f o r m a n c e C h a r a c t e r i s t i c s Figure 9. AS1102, AS1103, AS1104 ILED vs. RSET, VSET = 3V 22 20 18 VSAT = .5V VSAT = 0.5V VSAT = .6V VSAT = 0.6V Figure 10. AS1102, AS1103, AS1104 ILED vs. RSET; VSET = 3V 35 VSAT = 1V 30 VSAT = 0.6V ILED (mA) e 14 12 VSAT = 0.4V VSAT = .4V 10 8 6 4 0 20 40 60 80 100 120 140 160 VSAT = .3V VSAT = 0.3V ILED (mA) e 16 25 20 15 10 VSAT = 0.3V 5 0 0 VSAT = 0.15V 20 40 60 80 100 120 140 160 180 200 RSET (kΩ) Figure 11. AS1101 ILED vs. RSET; VSET = 3V 22 20 18 16 VSAT = 0.15V VSAT = 0.30V VSAT = 0.25V RSET (kΩ) Figure 12. ILED vs. Temp; VLED = -0.25V, ISET = 50µA 13 12.5 ILED (mA) e 14 12 10 8 6 4 2 10 20 30 40 50 60 70 80 90 100 VSAT = 0.10V VSAT = 0.05V ILED (mA) e VSAT = 0.20V 12 11.5 11 -40 -20 0 20 40 60 80 100 RSET (kΩ) Figure 13. AS1101 ILED vs. ISET 90 80 70 Temperature (°C) Figure 14. AS1102, AS1103, AS1104 ILED vs. ISET 45 40 35 30 ILED (mA) e 60 40 30 20 10 0 0 20 40 60 80 100 120 140 160 ILED (mA) e 50 25 20 15 10 5 0 0 20 40 60 80 100 120 140 160 ISET (µA) ISET (µA) www.austriamicrosystems.com Revision 1.5 7 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - T y p i c a l P e r f o r m a n c e C h a r a c t e r i s t i c s Figure 15. AS1101 vs. RSET 60 50 40 AS11011 Figure 16. AS1102, AS1103, AS1104 ILED vs. VIN 60 50 40 30 20 10 0 LED Type 1 LED Type 2 ILED (mA) e 30 20 10 0 3.0 3.5 4.0 RSET 4.5 5.0 ILED (mA) e 3.0 3.5 4.0 4.5 5.0 VIN (V) Figure 17. Control Voltage Transient Response VIN (V) Figure 18. Enable Voltage Transient Response LED Current LED Current 10mA/Div Enable Voltage CTRL Voltage 2V/Div 1µs/Div 1µs/Div www.austriamicrosystems.com Revision 1.5 2V/Div 10mA/Div 8 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - A p p l i c a t i o n I n f o r m a t i o n 8 Application Information Figure 19. Typical Application Diagrams 2 Diode Control with Enable VIN VIN 3 Diode Control with Enable I1/I2 VSAT ISET VSET (3V) RSET CTRL ON GND I3/I4 ISET VSET (3V) I1 VSAT I2 I3 AS1101 RSET CTRL ON AS1102 GND ENABLE ENABLE 4 Diode Control VIN VIN 4 Diode Control with Enable I1 VSAT I2 ISET VSET (3V) RSET CTRL I3 I4 ISET VSET (3V) I1 VSAT I2 I3 I4 AS1103 GND RSET CTRL ON AS1104 GND ENABLE Setting the LED Current The current going into the LEDs is approximately OCMR times greater then the current ISET. LED current is controlled by VSET and RSET (see Figure 19) according to the formula: ILED = OCMR x (VSET - VCTRL)/RSET (EQ 1) For VSET = 3V and a specific LED current, the value of RSET can be determined using the graphs shown in Figure 9, Figure 10, and Figure 11 on page 7. For any other option, the value of ISET can be determined using the graph in Figure 3 on page 6. Note: LED brightness can also be adjusted by driving pin ENABLE or pin CTRL with a PWM signal. www.austriamicrosystems.com Revision 1.5 9 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 9 Package Drawings and Markings Figure 20. SC70-6 Package Notes: 1. All dimensions are in millimeters. 2. Dimensions are inclusive of plating. 3. Dimensions are exclusive of mold flash and metal burrs. 4. All specifications comply with JEITA SC88 and JEDEC-MO-203. Symbol Min Max e D b E HE Q1 A2 A1 A c L Lj 1.80 0.15 1.15 1.80 0.10 0.80 0.00 0.80 0.10 0.10 0.26 0.65 BSC 2.20 0.30 1.35 2.40 0.40 1.00 0.10 1.10 0.18 0.30 0.46 www.austriamicrosystems.com Revision 1.5 10 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s Figure 21. MSOP-8 Package Symbol Millimeters ± Tolerance Symbol Millimeters ± Tolerance A A1 A2 D D2 E E1 E2 E3 E4 R R1 t1 t2 Notes: 1.10 0.10 0.86 3.00 2.95 4.90 3.00 2.95 0.51 0.51 0.15 0.15 0.31 0.41 Max ±0.05 ±0.08 ±0.10 ±0.10 ±0.15 ±0.10 ±0.10 ±0.13 ±0.13 +0.15 to -0.08 +0.15 to -0.08 ±0.08 ±0.08 b b1 c c1 θ1 θ2 θ3 0.33 0.30 0.18 0.15 3.0º 12.0º 12.0º 0.55 0.95 BSC 0.10 0.08 0.25 .65 BSC .525 BSC +0.07 to -0.08 ±0.05 ±0.05 +0.03 to -0.02 ±3.0º ±3.0º ±3.0º ±0.15 L L1 aaa bbb ccc e S 1. 2. 3. 4. 5. 6. 7. All dimensions are in millimeters (angle in degrees), unless otherwise specified. Datums B and C to be determined at datum plane H. Dimensions D and E1 are to be determined at datum plane H. Dimensions D2 and E2 are for top package and D and E1 are for bottom package. Cross section A-A to be determined at 0.13 to 0.25mm from the lead tip. Dimensions D and D2 do not include mold flash, protrusion, or gate burrs. Dimension E1 and E2 do not include interlead flash or protrusion. www.austriamicrosystems.com Revision 1.5 11 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet - O r d e r i n g I n f o r m a t i o n 10 Ordering Information Part Number Marking Description Package Type Delivery Form AS1101-T AS1102-T AS1103-T AS1104-T AS1104 JO1 JO2 JO3 JO4 Dual LED driver with enable. Triple LED driver with enable. Quad LED driver. Quad LED driver with enable. MSOP-8 Tape and Reel Tubes SC70-6 Tape and Reel www.austriamicrosystems.com Revision 1.5 12 - 13 AS1101/AS1102/AS1103/AS1104 Data Sheet Copyrights Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. 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Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com Revision 1.5 13 - 13