AS1110 AMSCO [austriamicrosystems AG], AS1110 Datasheet
AS1110
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AS1110 Summary of contents
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... AS1110 tan Driver with Diagnost ics 1 General Description The AS1110 is designed to drive LEDs through a fast serial interface and features 16 output constant current drivers and an on-chip diagnostic read-back function. The high clock-frequency (up to 50MHz), adjustable out- ...
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... AS1110 Data Sheet Contents 1 General Description ................................................................................................................................ 1 2 Key Features .......................................................................................................................................... 1 3 Applications ............................................................................................................................................ 1 4 Pinout ..................................................................................................................................................... 3 Pin Assignments ..................................................................................................................................................... 3 Pin Descriptions ..................................................................................................................................................... 3 5 Absolute Maximum Ratings .................................................................................................................... 4 6 Electrical Characteristics ........................................................................................................................ 5 Switching Characteristics ....................................................................................................................................... 6 7 Typical Operating Characteristics ........................................................................................................... 7 8 Detailed Description ............................................................................................................................... 8 Serial Interface ....................................................................................................................................................... 9 Timing Diagrams .................................................................................................................................................... 9 Error-Detection Mode ........................................................................................................................................... 11 Global Error Mode ................................................................................................................................................ 11 Error Detection Functions ...
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... Ground Serial Data Input Serial Data Clock. The rising edge of the CLK signal is used to clock data into and out of the AS1110 shift register. In error mode, the rising edge of the CLK signal is used to switch error modes. Serial Data Load Output Current Drivers. These pins are used as LED drivers or for input sense for diagnostic modes ...
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... AS1110 Data Sheet - Absolute Maximum Ratings Stresses beyond those listed in Table 2 and functional operation of the device at these or any other conditions beyond those indicated in Characteristics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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... AS1110 Data Sheet - Electrical Characteristics V = +3.0 to +5.5V -40 to +85ºC (unless otherwise specified). DD AMB Table 3. Electrical Characteristics Symbol Parameter V Supply Voltage DD V Output Voltage DS I OUT I Output Current ...
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... P3,ON Propagation Delay Time t P3,OFF External Resistor Reaction Time t REXT2,1 External Resistor Reaction Time t REXT2 multiple AS1110 devices are cascaded and t transfer between two cascaded LED drivers. www.austriamicrosystems.com Condition R = Open‚ OUTN0:15 = Off EXT R = 744Ω‚ OUTN0:15 = Off EXT R = 372Ω‚ OUTN0:15 = Off ...
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... AS1110 Data Sheet - Typical Operating Characteristics Figure 3. Output Current vs EXT 0.8V 25° AMB 100 10 1 100 1000 Ω REXT ( ) Figure 5. Output Current vs ...
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... Data Sheet - Detailed Description The AS1110 is designed to drive LEDs through a fast serial interface and 16 constant-current output drivers. Furthermore, the AS1110 provides diagnostics for detecting open- or shorted-LEDs, as well as over-temperature con- ditions for LED display systems, especially LED traffic sign applications. ...
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... AS1110 Data Sheet - Serial Interface Data accesses are made serially via pins SDI and SDO. At each CLK rising edge, the signal present at pin SDI is shifted into the first bit of the internal shift register and the other bits are shifted ahead of the first bit. The MSB is the first bit to be clocked in ...
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... AS1110 Data Sheet - Figure 10. Data Input Timing Diagram OEN LD CLK Data Bit Data Bit Data Bit SDI0 15 14 Old Data Old Data SDO0 Bit 15 Bit 14 Figure 11. Data Input Example Timing Diagram Time ...
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... LEDs that are switched on during test time. To switch between error-detection modes clock pulses are needed (see Table Note: To test all LEDs, a test pattern that turns on all LEDs must be input to the AS1110. Global Error Mode Global error mode is entered when error-detection mode is started. Clock pulses during this period are used to select ...
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... Data Sheet - there are multiple AS1110s in a chain, the error flag will be gated through all devices. To get a valid result at the end of the chain, a logic 1 must be applied to the SDI input of the first device of the chain. If one device produces an error ...
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... AS1110s in a chain) via pin SDO. At the same time new data can be written into the shift register, which is loaded on the next rising edge of pin LD. This pattern is shown at the output drivers, at the falling edge of OEN. ...
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... Timing Diagrams on page Detailed Open-LED Error Report Example Consider a case where three AS1110s are cascaded in one chain indicates a LED is on indicates a LED is off, and an X indicates an open LED. The open-LED test is only applied to LEDs that are turned on. This test is used with a test pattern where all LEDs are on at test time ...
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... For detailed timing information see Timing Diagrams on page Detailed Shorted-LED Error Report Example Consider a case where three AS1110s are cascaded in one chain indicates a LED is on indicates a LED is off, and an X indicates a shorted LED. This test is used on-the-fly. IC1:[11111XX111111111] IC2:[1111111111111111] IC3:[X100011111111111] IC1 has two shorted LEDs which are switched on, IC3 has one shorted LED switched off due to input ...
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... To disable shutdown mode a 1 must be placed at SDI after the 3rd clock pulse. The shutdown/wakeup information will be latched through if multiple AS1110 devices are in a chain. At the rising edge of the 4th clock pulse the shutdown bit will be read out and the AS1110 will shutdown or wakeup. ...
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... Current Error Detection with Low-Current Diagnosis Mode This unique feature of the AS1110 uses an internal all 1s test pattern for a flicker free diagnosis of all LEDs. This error detection mode can be started at the end of each input cycle Figure 19. Low-Current Diagnosis Mode with Internal All 1s Test Pattern – 64 Cascaded AS1110s ...
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... Cascading Devices To cascade multiple AS1110 devices, pin SDO must be connected to pin SDI of the next AS1110 each rising edge of CLK the LSB of the shift register will be written into the shift register SDI of the next AS1110 in the chain. Note: When n*AS1110 devices are in one chain, n*16 clock pulses are needed to latch-in the input data. ...
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... Switching-Noise Reduction LED drivers are frequently used in switch-mode applications which normally exhibit switching noise due to parasitic inductance on the PCB. Load Supply Voltage Considering the package power dissipation limits (see EQ 4:6), the AS1110 should be operated within the range 0.4 to 1.0V. DS For example ...
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... AS1110 Data Sheet - Figure 22. Voltage Reducer using Resistor (Left) and Zener Diode (Right) Voltage Supply } V DROP V LED AS1110 www.austriamicrosystems.com Voltage Supply { V DROP AS1110 Revision 1.00 V LED ...
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... AS1110 Data Sheet - Package Drawings and Markings The AS1110 is available in a 28-pin QFN (5x5mm) package and a 24-pin SSOP package. Figure 23. 28-pin QFN (5x5mm) Packagee D INDEX AREA D/2 (D/2 xE/2) 4 aaa C 2x ...
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... AS1110 Data Sheet - Figure 24. 24-pin SSOP Package Symbol Min Max A 1.35 1.75 A1 0.10 0.25 A2 1.37 1.57 b 0.20 0.30 C 0.19 0.25 D 8.55 8.74 E 5.79 6.20 E1 3.81 3.99 e 0.635 BSC h 0.22 0.49 L 0.40 1.27 θ 0º 8º www.austriamicrosystems.com Revision 1. ...
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... The device is available as the standard products shown in Table 9. Ordering Information Type Constant-Current, 16-Channel LED Driver with AS1110-BSSU Constant-Current, 16-Channel LED Driver with AS1110-BSST Constant-Current, 16-Channel LED Driver with AS1110-BQFR Constant-Current, 16-Channel LED Driver with AS1110-BQFT www.austriamicrosystems.com Table 9. Description Delivery Form Diagnostics Tape and Reel Diagnostics Diagnostics ...
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... AS1110 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, 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. ...