austriamicrosystems A S 11 0 1 , A S 11 0 2 , A S 11 0 3 , A S 11 0 4 Data Sheet Low-Dropout LED Drivers 1 General Description 2 Key Features The AS110x family are LED drivers providing matched current source bias for any color LED, including white and blue. LED current is programmable using an external resistor. ! The AS1101 LED currents are typical 460 x ISET (per LED) at an LED cathode voltage of 150mV and typical 650 x ISET at an LED cathode voltage of 1V. ! The AS1102, AS1103, and AS1104 LED currents are typical 230 x ISET (per LED) at an LED cathode voltage of 150mV and typical 325 x ISET at an LED cathode voltage of 1V where ISET is the current through the external resistor connected to the CTRL pin. The AS110x family can drive up to 4 high-current LEDs. 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 devices are pin-to-pin compatible to the FAN5611, FAN5612 and FAN5614. The AS1101, AS1102, and AS1103 are available in a 6-pin SC70 package; the AS1104 is available in a 8-pin MSOP package. ! ! ! ! ! ! ! ! ! ! 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) Pin-to-Pin Compatible to FAN5611, FAN5612, and FAN5614 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. Figure 1. Typical Application Diagrams 2 Diode Control with On/Off 3 Diode Control with On/Off VIN VIN I1/I2 ISET CTRL VSET(3V) RSET ISET VSET(3V) AS1101 ON ENABLE I3/I4 I3 CTRL RSET 4 Diode Control I1 AS1102 ON ENABLE GND I2 GND 4 Diode Control with On/Off VIN VIN ISET I4 CTRL VSET(3V) RSET I3 I2 AS1103 GND www.austriamicrosystems.com I1 ISET I4 CTRL VSET(3V) RSET ENABLE Revision 1.3 ON I3 I2 I1 AS1104 GND 1 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Operating Conditions 4 Absolute Maximum Ratings Stresses beyond those listed in Table 1 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 Table 2 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 1. Absolute Maximum Ratings Parameter Min Max Unit VI1, VI2, VI3, VI4, CTRL and ON Voltage to GND -0.3 5 V 200 mW SC70-6 250 mW MSOP-8 100 mA 260 °C 150 °C 150 °C Power Dissipated by Device at TAMB = 85°C I1, I2, I3, I4 Steady State Current Package Body Temperature † Junction Temperature Storage Temperature -65 Electrostatic Discharge Protection (ESD) Level 2 kV Comment 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”. 4.1 Operating Conditions Table 2. Recommended Operating Conditions Parameter Min Typ Max Unit LED Cathode Voltage 0.15 0.6 3.6 V 2.2 3.0 3.6 V 0 0.2 0.5 V -40 25 85 °C Enable Voltage ON Mode Enable Voltage OFF Mode Ambient Temperature † † † Comments Not applicable to AS1103. www.austriamicrosystems.com Revision 1.3 2 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Electrical Characteristics – AS1101 5 DC Electrical Characteristics 5.1 Electrical Characteristics – AS1101 Conditions: TAMB = 25°C (unless otherwise noted). Table 3. Electrical Characteristics – AS1101 Parameter Symbol Conditions Min ISET Range ISET VON = 3V 25 Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 150mV, VON = 3V 350 500 650 Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 150mV, VON = 3V 315 450 585 Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 150mV, VON = 3V 295 420 545 Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 600mV, VON = 3V 435 620 805 Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 600mV, VON = 3V 425 610 795 Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 600mV, VON = 3V 415 590 765 Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 1000mV, VON = 3V 470 670 870 Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 1000mV, VON = 3V 460 660 860 Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 1000mV, VON = 3V 440 630 820 LED-to-LED Current Matching Match VON = 3V -3 ISET in OFF Mode ISET,OFF VCTRL = 3V, VSAT = 3V, VON = 0V IIN in OFF Mode IIN,OFF VCTRL = 3V, VSAT = 3V, VON = 0V, TAMB = 25°C † † EFF VIN = 3V, VON = 3V Max Units 150 µA 3 % 0.1 1 µA 0.1 1 µA VCTRL = 3V, VSAT = 3V, VON = 0V Peak Efficiency Typ 4 95 % Efficiency = (VIN - VSAT) / VIN. Information parameter, guaranteed by design. www.austriamicrosystems.com Revision 1.3 3 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Electrical Characteristics – AS1102, AS1103, AS1104 5.2 Electrical Characteristics – AS1102, AS1103, AS1104 Conditions: TAMB = 25°C (unless otherwise noted). Table 4. Electrical Characteristics – AS1102, AS1103, AS1104 Parameter Symbol Conditions Min ISET Range ISET VON = 3V 25 Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 150mV, VON = 3V 175 250 325 Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 150mV, VON = 3V 170 240 310 Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 150mV, VON = 3V 145 210 275 Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 600mV, VON = 3V 215 310 405 Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 600mV, VON = 3V 215 305 395 Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 600mV, VON = 3V 205 295 385 Output Current Multiplication Ratio OCMR ISET = 25µA, VSAT = 1000mV, VON = 3V 235 335 435 Output Current Multiplication Ratio OCMR ISET = 40µA, VSAT = 1000mV, VON = 3V 230 330 430 Output Current Multiplication Ratio OCMR ISET = 75µA, VSAT = 1000mV, VON = 3V 220 315 410 LED-to-LED Current Matching Match VON = 3V -3 ISET,OFF VCTRL = 3V, VSAT = 3V, VON = 0V IIN,OFF VCTRL = 3V, VSAT = 3V, VON = 0V, TAMB = 25°C ISET in OFF Mode IIN in OFF Mode 1 2 3 EFF VIN = 3V, VON = 3V Max Units 150 µA 3 % 0.1 1 µA 0.1 1 µA VCTRL = 3V, VSAT = 3V, VON = 0V Peak Efficiency Typ 2 95 % 1. Not applicable to AS1103. 2. Not applicable to AS1103. 3. Efficiency = (VIN - VSAT) / VIN. Information parameter, guaranteed by design. www.austriamicrosystems.com Revision 1.3 4 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet 6 Typical Performance Characteristics ISET vs V SET (RSET = 30k Ω) 100 90 80 70 60 50 40 30 20 10 0 100 90 80 70 60 50 40 30 20 10 0 ISET in µA ISET (µA) ISET vs V CTRL 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 0.0 0.5 1.0 1.5 V CTRL (V) AS1101 ILED vs V SAT 2.5 3.0 3.5 4.0 AS1102-AS1104 ILED vs V SAT 30 35 30 ISET = 100µA 25 ISET = 50µA 25 ILED (mA) ILED (mA) 2.0 V SET (V) 20 ISET = 25µA 15 20 ISET = 50µA 15 10 10 5 5 ISET = 25µA 0.0 0.2 0.4 0.6 0.8 1.0 0.0 0.2 0.4 V SAT (V) AS1102-AS1104 0.6 0.8 1.0 V SAT (V) AS1102-AS1104 ILED vs RSET ILED vs RSET 35 22 30 20 25 16 Vsat=0.6V 14 Vsat=0.5V 12 Vsat=0.4V 10 Vsat=0.3V ILED (mA) ILED ( mA) 18 Vsat=1V Vsat=0.6V 20 Vsat=0.3V 15 Vsat=0.15V 10 8 5 6 4 0 20 40 60 80 100 120 140 0 160 0 RSET (k Ω ) AS1101 ILED vs RSET 20 40 60 80 100 120 RSET (k Ω ) 140 160 180 200 ILED vs Te m pe rature (V LED = 0.25V, ISET = 50µA) 22 20 13 18 12.5 14 Vsat=0.30V 12 Vsat=0.25V 10 Vsat=0.20V 8 Vsat=0.15V 6 Vsat=0.10V 4 12 11.5 Vsat=0.05V 2 10 20 30 ILED in mA ILED (mA) 16 40 50 60 70 80 90 100 -40 0 20 40 60 80 11 100 Te m pe rature (°C) RSET (k Ω ) www.austriamicrosystems.com -20 Revision 1.3 5 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet OCM R vs ISET AS1102 - AS1104 700 350 600 300 500 250 OCMR OCMR AS1101 400 300 200 150 200 100 100 50 0 OCM R vs ISET 0 0 20 40 60 80 100 120 140 160 0 ISET (µA) 20 40 60 80 100 120 140 160 ISET (µA) Figure 2. Control Voltage Transient Response CH2: LED Current (10mA/Div) CH1: Control Voltage (2V/Div) Figure 3. Enable Voltage Transient Response CH2: LED Current (10mA/Div) CH1: Enable Voltage (2V/Div) www.austriamicrosystems.com Revision 1.3 6 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet 7 Application Information Figure 4. Typical Application Diagrams 2 Diode Control with On/Off 3 Diode Control with On/Off VIN VIN I1/I2 ISET CTRL VSET(3V) ON I3 ISET VSET(3V) AS1101 RSET ENABLE I3/I4 I2 CTRL AS1102 RSET ON ENABLE GND 4 Diode Control I1 GND 4 Diode Control with On/Off VIN VIN I4 ISET I3 CTRL VSET(3V) RSET I2 I1 I4 ISET AS1103 I3 CTRL VSET(3V) ON ENABLE I1 AS1104 RSET GND I2 GND Figure 5. Performance Characteristics ILED vs ISET AS1102 - AS1104 90 45 80 40 70 60 35 30 ILED (mA) ILED (mA) AS1101 50 40 30 20 10 25 20 15 10 5 0 0 0 20 40 60 80 100 120 140 160 0 20 40 ISET (µA) 60 80 100 120 140 160 ISET (µA) AS1102 - AS1104 AS1101 vs Res is tor ILED vs V IN 60 60 50 50 AS1101 40 30 20 LED Type 1 40 ILED (mA) ILED (mA) ILED vs ISET LED Type 2 30 20 Resistor 10 10 0 0 3.0 3.5 4.0 4.5 5.0 3.0 V IN (V) www.austriamicrosystems.com 3.5 4.0 4.5 5.0 V IN (V) Revision 1.3 7 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Setting the LED Current 7.1 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 4) according to the formula: ILED = OCMR x (VSET - VCTRL) RSET (EQ 1) For VSET = 3V and a specific LED current, the RSET value can be determined using the diagram shown in Section 6 Typical Performance Characteristics on page 5. For any other option, the value of ISET can be determined using the graph “ISET vs. VCTRL” on page 7. LED Brightness can also be adjusted by driving pin ENABLE or pin CTRL with a PWM signal. www.austriamicrosystems.com Revision 1.3 8 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Pin Descriptions and Assignments 8 Pinout and Packaging 8.1 Pin Descriptions and Assignments Table 5. Pin Descriptions Pin (See Figure 6) Name Description CTRL Sets LED current; connect to external resistor. I1 Connect to cathode of LED. I2 Connect to cathode of LED. I3 Connect to cathode of LED. I4 Connect to cathode of LED. GND Ground ON Device Enable Input. Figure 6. Pin Assignment – (Top View) CTRL 1 I1/I2 2 N/C 3 AS1101 6 ON CTRL 1 5 I3/I4 I2 2 4 GND I1 3 AS1102 6 ON CTRL 1 5 I3 I2 2 4 GND I1 3 AS1103 6 I3 5 I4 4 GND 6-Pin SC70 Packages ON 1 I3 2 8 N/C 7 CTRL AS1104 I4 3 6 I2 GND 4 5 I1 8-Pin MSOP Package www.austriamicrosystems.com Revision 1.3 9 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Package Drawings and Markings 8.2 Package Drawings and Markings Figure 7. 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 e www.austriamicrosystems.com Max 0.65 BSC D 1.80 2.20 0.30 b 0.15 E 1.15 1.35 HE 1.80 2.40 Q1 0.10 0.40 A2 0.80 1.00 A1 0.00 0.10 A 0.80 1.10 c 0.10 0.18 L 0.10 0.30 L1 0.26 0.46 Revision 1.3 10 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Package Drawings and Markings Figure 8. MSOP-8 Package Notes: 1. 2. 3. 4. 5. 6. All dimensions are in millimeters (angles 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; dimensions D and E1 are for bottom package. Cross section A-A to be determined at 0.18 to 0.22mm from the leadtip. Dimension D and D2 does not include mold flash, protrusions, or gate burrs. 7. Dimension E1 and E2 does not include inter-lead flash or protrusion. MSOP-8 Package Outline Symbol Millimeters ± Tolerance Symbol Millimeters ± Tolerance A 1.10 Max b 0.33 +0.07 to -0.08 A1 0.10 ±0.05 b1 0.30 ±0.05 A2 0.86 ±0.05 c 0.18 ±0.05 D 3.00 ±0.10 c1 0.15 +0.03 to -0.02 D2 2.95 ±0.10 θ1 3.0 ±3.0 E 4.90 ±0.15 θ2 12.0 ±3.0 E1 3.00 ±0.10 θ3 12.0 ±3.0 E2 2.95 ±0.10 L 0.55 ±0.15 E3 0.51 ±0.13 L1 0.95 BSC - E4 0.51 ±0.18 aaa 0.10 - R 0.15 +0.15 to -0.08 bbb 0.08 - R1 0.15 +0.15 to -0.08 ccc 0.25 - t1 0.31 ±0.08 e .5 BSC t2 0.41 ±0.08 S .525 BSC www.austriamicrosystems.com Revision 1.3 11 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet 9 Ordering Information Part Number Package Type Delivery Form Description Dual LED driver with enable. SC70-6 Tape and Reel Tube Triple LED driver with enable. AS1101 AS1102 AS1103 AS1104 Quad LED driver with enable. MSOP-8 www.austriamicrosystems.com Quad LED driver. Revision 1.3 12 - 13 austriam i c r o systems AS1101, AS1102, AS1103, AS1104 Data Sheet Copyrights Copyright © 1997-2005, 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. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 e-mail: [email protected] For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com austriamicrosystems – www.austriamicrosystems.com Revision 1.3 a leap ahead 13 - 13