AS1101 AMSCO | Alldatasheet
Document overview
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- PDF pages: 13
Technical content
1 General Description
650 x ISET at an LED cathode voltage of 1V. resistor connected to the CTRL pin. The AS110x family can drive up to 4 high-current LEDs. abled, the supply current drops to less than 1µA. Figure 1. Typical Application Diagrams
2 Key Features
3 Applications
DVD players, and consumer electronics.
4 Diode Control with On/Off
3 Diode Control with On/Off
4 Diode Control
2 Diode Control with On/Off
4 Absolute Maximum Ratings
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. ture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”.
4.1 Operating Conditions
Table 1. Absolute Maximum Ratings Norm: MIL-STD883E 3015 methods. Table 2. Recommended Operating Conditions
5.1 Electrical Characteristics – AS1101
Conditions: TAMB = 25°C (unless otherwise noted). Efficiency = (VIN - VSAT) / VIN. Information parameter, guaranteed by design. Table 3. Electrical Characteristics – AS1101
5.2 Electrical Characteristics – AS1102, AS1103, AS1104
Conditions: TAMB = 25°C (unless otherwise noted). Table 4. Electrical Characteristics – AS1102, AS1103, AS1104
- Not applicable to AS1103.
- Not applicable to AS1103.
- Efficiency = (V IN - VSAT) / VIN. Information parameter, guaranteed by design.
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6 Typical Performance Characteristics
V CT RL (V) ISET (µA) AS1102-AS1104 I LED vs V SAT V SAT (V) ILED (mA) ISET = 100µA ISET = 50µA ISET = 25µA AS1101 ILED vs V SAT VSAT (V) ILED (mA) ISET = 50µA ISET = 25µA AS1102-AS1104 I LED vs RSET 0 20 40 60 80 100 120 140 160 R SET (k Ω) ILED ( mA) Vsat=0.6V Vsat=0.5V Vsat=0.4V Vsat=0.3V AS1102-AS1104 I LED vs RSET 0 20 40 60 80 100 120 140 160 180 200 RSET (k Ω) ILED (mA) Vsat=1V Vsat=0.6V Vsat=0.3V Vsat=0.15V AS1101 ILED vs RSET 10 20 30 40 50 60 70 80 90 100 RSET (k Ω) ILED (mA) Vsat=0.30V Vsat=0.25V Vsat=0.20V Vsat=0.15V Vsat=0.10V Vsat=0.05V ILED vs Tem perature (V LED = 0.25V, ISET = 50µA) 11.5 12.5 -40 -20 0 20 40 60 80 100 Temperature (°C) ILED in mA ISET vs V SET (RSET = 30kΩ) 100 V SET (V) ISET in µA
7 Application Information
Figure 4. Typical Application Diagrams Figure 5. Performance Characteristics
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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: 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. ILED = OCMR x (VSET - VCTRL) RSET (EQ 1)
8 Pinout and Packaging
8.1 Pin Descriptions and Assignments
Figure 6. Pin Assignment – (Top View) Table 5. Pin Descriptions 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.
5 I14GND
8.2 Package Drawings and Markings
Figure 7. SC70-6 Package
- All dimensions are in millimeters.
- Dimensions are inclusive of plating.
- Dimensions are exclusive of mold flash and metal burrs.
- All specifications comply with JEITA SC88 and JEDEC-MO-203.
Figure 8. MSOP-8 Package
- 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.
- Dimension E1 and E2 does not include inter-lead flash or protrusion.
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9 Ordering Information
Part Number Package Type Delivery Form Description AS1101 SC70-6 Tape and Reel Tube Dual LED driver with enable. AS1102 Triple LED driver with enable. AS1103 Quad LED driver. AS1104 MSOP-8 Quad LED driver with enable.
www.austriamicrosystems.com Revision 1.3 13 - 13 AS1101, AS1102, AS1103, AS1104 austria micro systems 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, trans- lated, 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. austriami- crosystems 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 life- sustaining 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 tech- nical 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: info@austriamicrosystems.com For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com austria micro systems – a leap ahead