AS1111A-BWLT

AS1111 Low–Dropout LED Drivers General Description The AS1111A/AS1111B/AS1111C 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 AS1111A LED currents are 460 x I SET (per LED, typ) at an LED cathode voltage (V SAT ) of 150mV and 650 x ISET (typ) at a V SAT of 1V, where I SET is the current through RSET connected to pin CTRL. The AS1111B & AS1111C LED currents are 230 x I SET (per LED, typ) at a V SAT of 150mV and 325 x ISET (typ) at a V SAT of 1V. All AS1111 versions incorporate a chip-enable feature via pin EN. When the devices are disabled, the supply current drops down to less than 1μA. The AS1111A and AS1111B are available in a 6-pin WL-CSP package with 0.4mm pitch. The AS1111C is available in an 8-pin MLPD (2x2mm) package with 0.5mm pitch. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS1111, Low–Dropout LED Drivers are listed below: Figure 1: Added Value of Using AS1111 Benefits Features High efficient • Ultra Low Voltage Drop: less than 150mV Supports a variety of end applications • Analog and PWM Brightness Control • Up to 80mA per LED (AS1111A) • Up to 40mA per LED (AS1111B, AS1111C) Extended battery life • Active-Low Shutdown Mode • Low Shutdown Current: less than 1μA Suitable for EMF sensitive environment • No electromagnetic interference • No switching noise Small PCB area • Less external components needed Cost effective, small package • 6-pin WL-CSP with 0.4mm pitch • 8-pin MLPD (2x2mm) with 0.5mm pitch ams Datasheet [v1-06] 2015-Apr-07 Page 1 Document Feedback AS1111 − General Description Applications The AS1111 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. Application Diagram The typical application diagram of this device for reference is shown below: Figure 2: AS1111 Typical Application Diagram VIN VSAT VSET 3.0V RSET ON I1/I2 I3/I4 CTRL AS1111A EN OFF GND VIN VSAT VSET 3.0V RSET ON I1 I2 I3 CTRL AS1111B EN OFF GND VIN VSAT VSET 3.0V RSET ON I1 I2 I3 I4 CTRL EN AS1111C OFF GND Page 2 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Pin Assignment Pin Assignment Figure 3: Pin Assignment of AS1111A/B and AS1111C 1 8 AS1111C 2 7 MLPD 8-pin 2x2mm Exposed pad: GND 3 4 9 6 5 Pin Assignment: Shows the TOP through view pin assignment of the AS1111A/B and AS1111C. Pin Description Figure 4: Pin Description of AS1111 Pin Number Pin Name Description AS1111A AS1111B AS1111C A2 A2 4 GND Ground. Connect to GND B2 - - GND Ground. Connect to GND (AS1111A) B3 B3 7 CTRL Control. Sets the LED current; connect to external resistor RSET B1 B1 1 EN Enable. Device enable/PWM Input. 1 = Normal Operation 0 = Shutdown - A3 5 I1 Input1. Connect to cathode of LED1 (AS1111B&C) - B2 6 I2 Input2. Connect to cathode of LED2 (AS1111B&C) - A1 2 I3 Input3. Connect to cathode of LED3 (AS1111B&C) ams Datasheet [v1-06] 2015-Apr-07 Page 3 Document Feedback AS1111 − Pin Assignment Pin Number Pin Name Description AS1111A AS1111B AS1111C A3 - - I1/I2 Input1/2. Connect to cathode of LED1 (AS1111A) A1 - - I3/I4 Input3/4. Connect to cathode of LED2 (AS1111A) - - 3 I4 Input4. Connect to cathode of LED4 (AS1111C) 8 NC Not Connected. (AS1111C) - - 9 Exposed Pad. Connect this pad to the GND plane on the PCB to maximize power dissipation (AS1111C) Pin Description: Shows the pin number, name and description of every pin. Page 4 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings Figure 5: Absolute Maximum Ratings Symbol Parameter Min Max Units Comments Electrical Parameters Supply Voltage to Ground 5V pins -0.3 5.0 V Input Current (latch-up immunity) -100 100 mA Applicable for pins: I1, I2, I3, I4, I1/I2, I3/I4, CTRL, EN Norm: JEDEC JESD78 Electrostatic Discharge ESDHBM Electrostatic Discharge HBM ±2 kV Norm: JEDEC JESD22-A114F Temperature Ranges and Storage Conditions TA RTHJA (1) Operating Temperature -40 Junction to Ambient Thermal Resistance TJ Junction Temperature TSTRG Storage Temperature Range TBODY Package Body Temperature RHNC Relative Humidity non-condensing MSL Moisture Sensitivity Level (WL-CSP & MLPD) -55 5 1 85 °C 60 °C/W MLPD 95 °C/W WL-CSP 125 °C WL-CSP 125 °C 260 °C 85 % Norm: IPC/JEDEC J-STD-020 (2) Represents an unlimited floor life time Note(s) and/or Footnote(s): 1. Junction-to-ambient thermal resistance is very dependent on application and board-layout. In situations where high maximum power dissipation exists, special attention must be paid to thermal dissipation during board design. 2. The reflow peak soldering temperature (body temperature) is specified according to IPC/JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification for Non-hermetic Solid State Surface Mount Devices.” ams Datasheet [v1-06] 2015-Apr-07 Page 5 Document Feedback AS1111 − Electrical Characteristics Electrical Characteristics All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Figure 6: Electrical Characteristics Symbol Note Min Typ Max Unit Cathode Voltage at pins I1, I2, I3, I4, I1/I2, I3/I4 0.15 0.6 3.6 V VEN_HIGH Enable Voltage High pin EN 2.2 3.6 V VEN_LOW Enable Voltage Low pin EN 0 0.5 V ISET range VEN = 3V 25 150 μA ISET in OFF mode VCTRL = 3V, VSAT = 3V, VEN = 0V 0.1 1 μA VCTRL = 3V, VSAT = 3V, VEN = 0V, TAMB = 25°C 0.1 1 μA VCTRL = 3V, VSAT = 3V, VEN = 0V, TAMB = -40°C to 85°C (for AS1111A) 4 μA VCTRL = 3V, VSAT = 3V, VEN = 0V, TAMB = -40°C to 85°C 2 μA VSAT ISET ISET_OFF IIN_OFF Parameter IIN in OFF mode Eff (1) Peak Efficiency VIN = 3V, VEN = 3V 95 Match LED to LED Current Matching VEN = 3V -3 % 3 % Electrical Characteristics: Shows the Electrical Characteristics of the LED Driver. TAMB = –40 to 85°C (unless otherwise specified) Note(s) and/or Footnote(s): 1. Efficiency = (VIN – V SAT )/VIN. Guaranteed by design. Page 6 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Electrical Characteristics Figure 7: Output Current Multiplication Ratio AS1111A AS1111B AS1111C ISET = 25μA, VSAT = 150mV, VEN = 3V 350 500 650 ISET = 40μA, VSAT = 150mV, VEN = 3V 335 480 625 ISET = 75μA, VSAT = 150mV, VEN = 3V 295 420 545 ISET = 25μA, VSAT = 600mV, VEN = 3V 435 620 805 ISET = 40μA, VSAT = 600mV, VEN = 3V 425 610 795 ISET = 75μA, VSAT = 600mV, VEN = 3V 415 590 765 ISET = 25μA, VSAT = 1V, VEN = 3V 470 670 870 ISET = 40μA, VSAT = 1V, VEN = 3V 460 660 860 ISET = 75μA, VSAT = 1V, VEN = 3V 440 630 820 ISET = 25μA, VSAT = 150mV, VEN = 3V 175 250 325 ISET = 40μA, VSAT = 150mV, VEN = 3V 170 240 310 ISET = 75μA, VSAT = 150mV, VEN = 3V 145 210 275 ISET = 25μA, VSAT = 600mV, VEN = 3V 220 310 405 ISET = 40μA, VSAT = 600mV, VEN = 3V 215 305 395 ISET = 75μA, VSAT = 600mV, VEN = 3V 205 295 385 ISET = 25μA, VSAT = 1V, VEN = 3V 235 335 435 ISET = 40μA, VSAT = 1V, VEN = 3V 230 330 430 ISET = 75μA, VSAT = 1V, VEN = 3V 220 315 410 Output Current Multiplication Ratio: Shows the OCMR of the LED Driver for setting of ISET and different Cathode Voltages VSAT. TAMB = –40 to 85°C (unless otherwise specified) ams Datasheet [v1-06] 2015-Apr-07 Page 7 Document Feedback AS1111 − Typical Operating Characteristics Typical Operating Characteristics Figure 8: SET Current vs. CTRL Voltage Figure 9: SET Current vs. SET Voltage, RSET = 30kΩ Page 8 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Typical Operating Characteristics Figure 10: LED Current vs. SAT Voltage Figure 11: OCMR vs. SET Current 700 350 600 300 AS1111A 400 300 AS1111B AS1111C 250 OCMR OCMR 500 200 150 200 100 100 50 0 0 0 20 40 60 80 100 120 140 160 ISET (µA) ams Datasheet [v1-06] 2015-Apr-07 0 20 40 60 80 100 120 140 160 ISET (µA) Page 9 Document Feedback AS1111 − Typical Operating Characteristics Figure 12: LED Current vs. SET Resistor, VSET = 3V Figure 13: LED Current vs. SET Resistor, VSET = 3V Page 10 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Typical Operating Characteristics Figure 14: LED Current vs. Temperature, VLED = -0.25V, ISET = 50μA Figure 15: LED Current vs. SET Current ams Datasheet [v1-06] 2015-Apr-07 Page 11 Document Feedback AS1111 − Typical Operating Characteristics Figure 16: VSET Voltage Transient Response 1V/Div 20mA/Div 1us/Div Figure 17: VEN Voltage Transient Response 1V/Div 20mA/Div 1us/Div Page 12 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Detailed Description Detailed Description Setting of the LED Current The current going into the LEDs is approximately OCMR times greater than the current I SET. The LED current is controlled by V SET and R SET according to the formula: (EQ1) V SET – V CTRL I LED = OCMR ⋅ ------------------------------------R SET For V SET = 3V and a specific LED current, the value of R SET can be determined using the graphs shown in Figure 12 and Figure 13. For any other option, the value of ISET can be determined using the graph in Figure 8. LED brightness can also be adjusted by driving pin EN or pin CTRL with a PWM signal. ams Datasheet [v1-06] 2015-Apr-07 Page 13 Document Feedback AS1111 − Package Drawings & Mark ings Package Drawings & Markings Figure 18: MLPD-8 2x2mm 0.5mm Pitch Package Drawing RoHS Green Ref Min Nom Max A 0.51 0.55 0.60 A1 0.00 0.02 0.05 A3 0.15 REF L 0.225 0.325 0.425 b 0.18 0.25 0.30 D 2.00 BSC E 2.00 BSC e 0.50 BSC D2 1.45 1.60 1.70 E2 0.75 0.90 1.00 aaa - 0.15 - bbb - ccc 0.10 - 0.10 - ddd - 0.05 - eee - 0.08 - fff - 0.10 - N 8 Note(s) and/or Footnote(s): 1. Dimensioning and Tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. Angles are in degrees. 3. Coplanarity applies to the exposed heat slug as well as the terminal. 4. Radius on terminal is optional. 5. N is the total number of terminals. Page 14 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Package Drawings & Markings Figure 19: WL-CSP-6 0.4mm Pitch Package Drawing RoHS Green Note(s) and/or Footnote(s): 1. Pin1 = A1 2. ccc Coplanarity 3. All dimensions are in μm ams Datasheet [v1-06] 2015-Apr-07 Page 15 Document Feedback AS1111 − Package Drawings & Mark ings Figure 20: AS1111A & AS1111B Package Marking WL-CSP YY XXXX XXXX Figure 21: AS1111C Package Marking MLPD package AAR XXX Figure 22: AS1111 Package Code YY XXXX AAR XXX Marking for WL-CSP Tracecode for WL-CSP Marking for MLPD Tracecode for MLPD Page 16 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Ordering & Contact Information Ordering & Contact Information Figure 23: Ordering Information Ordering Code Marking Description Delivery Form Package AS1111A-BWLT CY Dual LED driver with enable and 80mA LED current per channel Tape & Reel 6-pin WL-CSP 0.4mm pitch AS1111B-BWLT CZ Triple LED driver with enable and 40mA LED current per channel Tape & Reel 6-pin WL-CSP 0.4mm pitch AS1111C-BDFT AAR Quad LED driver with enable and 40mA LED current per channel Tape & Reel MLPD-8lead (2mm x 2mm) Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: ams_sales@ams.com For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com ams Datasheet [v1-06] 2015-Apr-07 Page 17 Document Feedback AS1111 − RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Page 18 Document Feedback ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Copyrights & Disclaimer Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 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. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams 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 ams AG rendering of technical or other services. ams Datasheet [v1-06] 2015-Apr-07 Page 19 Document Feedback AS1111 − Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) Page 20 Document Feedback Product Status Definition Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs ams Datasheet [v1-06] 2015-Apr-07 AS1111 − Revision Information Revision Information Changes from 1-01 (2013-Nov) to current revision 1-06 (2015-Apr-07) Page 1-01 (2013-Nov) to 1-03 (2014-Dec-03) Content was updated to the latest ams design Updated Figure 3 3 1-03 (2014-Dec-03) to 1-04 (2015-Mar-20) Updated caption below Figure 3 3 Updated Figure 5 5 Updated Figure 11 9 Updated Figure 16 & Figure 17 12 1-04 (2015-Mar-20) to 1-05 (2015-Apr-06) Updated Figure 5 5 Updated Figures 16 & 17 12 1-05 (2015-Apr-06) to 1-06 (2015-Apr-07) Updated text under General Description 1 Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision. 2. Correction of typographical errors is not explicitly mentioned. ams Datasheet [v1-06] 2015-Apr-07 Page 21 Document Feedback AS1111 − Content Guide Content Guide Page 22 Document Feedback 1 1 2 2 General Description Key Benefits & Features Applications Block Diagram 3 3 Pin Assignment Pin Description 4 6 8 Absolute Maximum Ratings Electrical Characteristics Typical Operating Characteristics 13 13 Detailed Description Setting of the LED Current 14 17 18 19 20 21 Package Drawings & Markings Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information ams Datasheet [v1-06] 2015-Apr-07